diff --git a/e2e/.env-local b/e2e/.env-local
index 77e443bb..797e8cdd 100644
--- a/e2e/.env-local
+++ b/e2e/.env-local
@@ -1,10 +1,36 @@
-# E2E Test Configuration
-SERVER_EVM_ADDRESS=
-SERVER_SVM_ADDRESS=
-SERVER_STELLAR_ADDRESS=
-CLIENT_EVM_PRIVATE_KEY=
-CLIENT_SVM_PRIVATE_KEY=
-CLIENT_STELLAR_PRIVATE_KEY=
-FACILITATOR_EVM_PRIVATE_KEY=
-FACILITATOR_SVM_PRIVATE_KEY=
-FACILITATOR_STELLAR_PRIVATE_KEY=
+# E2E Environment Template
+# Copy to .env and fill in real values.
+
+# Client wallets
+CLIENT_EVM_PRIVATE_KEY=0x...
+CLIENT_SVM_PRIVATE_KEY=...
+CLIENT_APTOS_PRIVATE_KEY=...
+CLIENT_STELLAR_PRIVATE_KEY=...
+CLIENT_TRON_PRIVATE_KEY=...
+
+# Server payment addresses
+SERVER_EVM_ADDRESS=0x...
+SERVER_SVM_ADDRESS=...
+SERVER_APTOS_ADDRESS=...
+SERVER_STELLAR_ADDRESS=...
+SERVER_TRON_ADDRESS=...
+EVM_FACILITATOR_ADDRESS=0x...
+TRON_FACILITATOR_ADDRESS=...
+
+# Facilitator wallets
+FACILITATOR_EVM_PRIVATE_KEY=0x...
+FACILITATOR_SVM_PRIVATE_KEY=...
+FACILITATOR_APTOS_PRIVATE_KEY=...
+FACILITATOR_STELLAR_PRIVATE_KEY=...
+FACILITATOR_TRON_PRIVATE_KEY=...
+
+# Optional network overrides
+# EVM_NETWORK=eip155:97
+# TRON_NETWORK=tron:nile
+
+# Optional RPC overrides
+# BSC_TESTNET_RPC_URL=https://bsc-testnet-rpc.publicnode.com
+# TRON_NILE_RPC_URL=https://nile.trongrid.io
+# SOLANA_DEVNET_RPC_URL=https://api.devnet.solana.com
+# APTOS_TESTNET_RPC_URL=https://fullnode.testnet.aptoslabs.com/v1
+# STELLAR_TESTNET_RPC_URL=https://soroban-testnet.stellar.org
diff --git a/e2e/README.md b/e2e/README.md
index ea77517d..d3977cfc 100644
--- a/e2e/README.md
+++ b/e2e/README.md
@@ -101,12 +101,15 @@ SERVER_EVM_ADDRESS=0x...            # Where servers receive EVM payments
 SERVER_SVM_ADDRESS=...              # Where servers receive Solana payments
 SERVER_APTOS_ADDRESS=0x...          # Where servers receive Aptos payments
 SERVER_STELLAR_ADDRESS=...          # Where servers receive Stellar payments
+SERVER_TRON_ADDRESS=...             # Where servers receive TRON payments
+TRON_FACILITATOR_ADDRESS=...        # TRON facilitator address for Permit2 (base58)
 
 # Facilitator wallets (for payment verification/settlement)
 FACILITATOR_EVM_PRIVATE_KEY=0x...   # EVM private key for facilitator
 FACILITATOR_SVM_PRIVATE_KEY=...     # Solana private key for facilitator
 FACILITATOR_APTOS_PRIVATE_KEY=...   # Aptos private key for facilitator (hex string)
 FACILITATOR_STELLAR_PRIVATE_KEY=... # Stellar private key for facilitator
+FACILITATOR_TRON_PRIVATE_KEY=...    # TRON private key for facilitator
 ```
 
 ### Account Setup Instructions
diff --git a/e2e/clients/axios/index.ts b/e2e/clients/axios/index.ts
index 3e919bed..ec0f0312 100644
--- a/e2e/clients/axios/index.ts
+++ b/e2e/clients/axios/index.ts
@@ -1,6 +1,7 @@
 import { config } from "dotenv";
 import axios from "axios";
 import { wrapAxiosWithPayment, decodePaymentResponseHeader } from "@bankofai/x402-axios";
+import { decodePaymentRequiredHeader } from "@bankofai/x402-core/http";
 import { createPublicClient, http } from "viem";
 import { privateKeyToAccount } from "viem/accounts";
 import { bscTestnet } from "viem/chains";
@@ -107,11 +108,31 @@ axiosWithPayment
     process.exit(0);
   })
   .catch(error => {
+    const status = error.response?.status || 500;
+    const headers = error.response?.headers || {};
+    const paymentRequiredHeader = headers["payment-required"] || headers["x-payment"];
+    const paymentResponseHeader = headers["payment-response"] || headers["x-payment-response"];
+
+    let paymentRequired = undefined;
+    let paymentResponse = undefined;
+    if (paymentRequiredHeader) {
+      try {
+        paymentRequired = decodePaymentRequiredHeader(paymentRequiredHeader);
+      } catch {}
+    }
+    if (paymentResponseHeader) {
+      try {
+        paymentResponse = decodePaymentResponseHeader(paymentResponseHeader);
+      } catch {}
+    }
+
     console.error(
       JSON.stringify({
         success: false,
         error: error.message || "Request failed",
-        status_code: error.response?.status || 500,
+        status_code: status,
+        payment_required: paymentRequired,
+        payment_response: paymentResponse,
       }),
     );
     process.exit(1);
diff --git a/e2e/clients/httpx/main.py b/e2e/clients/httpx/main.py
index 359d6794..a6eeb12e 100644
--- a/e2e/clients/httpx/main.py
+++ b/e2e/clients/httpx/main.py
@@ -8,12 +8,14 @@
 
 # Import from new x402 package
 from bankofai.x402 import x402Client
-from bankofai.x402.http import decode_payment_response_header
+from bankofai.x402.http import decode_payment_response_header, decode_payment_required_header
 from bankofai.x402.http.clients import x402_httpx_transport
 from bankofai.x402.mechanisms.evm import EthAccountSigner
 from bankofai.x402.mechanisms.evm.exact import register_exact_evm_client
 from bankofai.x402.mechanisms.svm import KeypairSigner
 from bankofai.x402.mechanisms.svm.exact import register_exact_svm_client
+from bankofai.x402.mechanisms.tron.signers import ClientTronSigner
+from bankofai.x402.mechanisms.tron.exact import register_exact_tron_client
 import httpx
 
 # Load environment variables
@@ -22,6 +24,8 @@
 # Get environment variables
 evm_private_key = os.getenv("EVM_PRIVATE_KEY")
 svm_private_key = os.getenv("SVM_PRIVATE_KEY")
+tron_private_key = os.getenv("TRON_PRIVATE_KEY")
+tron_rpc_url = os.getenv("TRON_RPC_URL")
 base_url = os.getenv("RESOURCE_SERVER_URL")
 endpoint_path = os.getenv("ENDPOINT_PATH")
 
@@ -54,9 +58,17 @@ async def main():
         svm_signer = KeypairSigner.from_base58(svm_private_key)
         register_exact_svm_client(client, svm_signer)
 
+    # Register TRON exact scheme if private key is available
+    if tron_private_key:
+        tron_signer = ClientTronSigner(
+            private_key=tron_private_key,
+            full_node=tron_rpc_url or "https://nile.trongrid.io",
+        )
+        register_exact_tron_client(client, tron_signer)
+
     # Create httpx client with x402 payment transport and increased timeout
-    # Set timeout to 30 seconds to handle busy servers during test runs
-    timeout = httpx.Timeout(30.0, connect=10.0)
+    # Set timeout to 90 seconds to handle slow on-chain settlement during test runs
+    timeout = httpx.Timeout(90.0, connect=10.0)
     async with httpx.AsyncClient(
         base_url=base_url,
         timeout=timeout,
@@ -76,6 +88,7 @@ async def main():
                 "data": response_data,
                 "status_code": response.status_code,
                 "payment_response": None,
+                "payment_required": None,
             }
 
             # Check for payment response header (V2: PAYMENT-RESPONSE, V1: X-PAYMENT-RESPONSE)
@@ -86,6 +99,13 @@ async def main():
                 payment_response = decode_payment_response_header(payment_header)
                 result["payment_response"] = payment_response.model_dump()
 
+            payment_required_header = response.headers.get("PAYMENT-REQUIRED") or response.headers.get(
+                "X-PAYMENT"
+            )
+            if payment_required_header:
+                payment_required = decode_payment_required_header(payment_required_header)
+                result["payment_required"] = payment_required.model_dump()
+
             # Output structured result as JSON for proxy to parse
             print(json.dumps(result))
             exit(0)
diff --git a/e2e/clients/httpx/pyproject.toml b/e2e/clients/httpx/pyproject.toml
index 7e610938..0049e5b0 100644
--- a/e2e/clients/httpx/pyproject.toml
+++ b/e2e/clients/httpx/pyproject.toml
@@ -5,7 +5,7 @@ description = "Python httpx client for x402 e2e tests"
 requires-python = ">=3.10"
 dependencies = [
     "python-dotenv>=1.0.0",
-    "bankofai.x402[httpx,evm,svm,extensions]"
+    "bankofai.x402[httpx,evm,svm,tron,extensions]"
 ]
 
 [build-system]
diff --git a/e2e/clients/httpx/test.config.json b/e2e/clients/httpx/test.config.json
index fcdeb61f..064fbcf5 100644
--- a/e2e/clients/httpx/test.config.json
+++ b/e2e/clients/httpx/test.config.json
@@ -4,14 +4,18 @@
   "language": "python",
   "protocolFamilies": [
     "evm",
-    "svm"
+    "svm",
+    "tron"
   ],
   "x402Versions": [
     1,
     2
   ],
   "evm": {
-    "transferMethods": ["eip3009"]
+    "transferMethods": ["eip3009", "permit2"]
+  },
+  "tron": {
+    "transferMethods": ["transferWithAuthorization", "permit2"]
   },
   "description": "Python httpx client with x402 v2 payment hooks",
   "environment": {
@@ -21,7 +25,9 @@
     ],
     "optional": [
       "EVM_PRIVATE_KEY",
-      "SVM_PRIVATE_KEY"
+      "SVM_PRIVATE_KEY",
+      "TRON_PRIVATE_KEY",
+      "TRON_RPC_URL"
     ]
   }
-}
\ No newline at end of file
+}
diff --git a/e2e/clients/httpx/uv.lock b/e2e/clients/httpx/uv.lock
index 23ab287f..22cbdd0f 100644
--- a/e2e/clients/httpx/uv.lock
+++ b/e2e/clients/httpx/uv.lock
@@ -1,5 +1,9 @@
 version = 1
 requires-python = ">=3.10"
+resolution-markers = [
+    "python_full_version == '3.14.*'",
+    "python_full_version != '3.14.*'",
+]
 
 [[package]]
 name = "aiohappyeyeballs"
@@ -166,6 +170,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/7f/9c/36c5c37947ebfb8c7f22e0eb6e4d188ee2d53aa3880f3f2744fb894f0cb1/anyio-4.12.0-py3-none-any.whl", hash = "sha256:dad2376a628f98eeca4881fc56cd06affd18f659b17a747d3ff0307ced94b1bb", size = 113362 },
 ]
 
+[[package]]
+name = "asn1crypto"
+version = "1.5.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/de/cf/d547feed25b5244fcb9392e288ff9fdc3280b10260362fc45d37a798a6ee/asn1crypto-1.5.1.tar.gz", hash = "sha256:13ae38502be632115abf8a24cbe5f4da52e3b5231990aff31123c805306ccb9c", size = 121080 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/c9/7f/09065fd9e27da0eda08b4d6897f1c13535066174cc023af248fc2a8d5e5a/asn1crypto-1.5.1-py2.py3-none-any.whl", hash = "sha256:db4e40728b728508912cbb3d44f19ce188f218e9eba635821bb4b68564f8fd67", size = 105045 },
+]
+
 [[package]]
 name = "async-timeout"
 version = "5.0.1"
@@ -212,13 +225,18 @@ svm = [
     { name = "solana" },
     { name = "solders" },
 ]
+tron = [
+    { name = "base58" },
+    { name = "tronpy" },
+]
 
 [package.metadata]
 requires-dist = [
-    { name = "bankofai-x402", extras = ["evm", "svm"], marker = "extra == 'mechanisms'" },
     { name = "bankofai-x402", extras = ["flask", "fastapi"], marker = "extra == 'servers'" },
     { name = "bankofai-x402", extras = ["httpx", "requests"], marker = "extra == 'clients'" },
-    { name = "bankofai-x402", extras = ["httpx", "requests", "flask", "fastapi", "evm", "svm", "mcp", "extensions"], marker = "extra == 'all'" },
+    { name = "bankofai-x402", extras = ["httpx", "requests", "flask", "fastapi", "tron", "evm", "svm", "mcp", "extensions"], marker = "extra == 'all'" },
+    { name = "bankofai-x402", extras = ["tron", "evm", "svm"], marker = "extra == 'mechanisms'" },
+    { name = "base58", marker = "extra == 'tron'", specifier = ">=2.1.1" },
     { name = "eth-abi", marker = "extra == 'evm'", specifier = ">=5.0.0" },
     { name = "eth-account", marker = "extra == 'evm'", specifier = ">=0.12.0" },
     { name = "eth-keys", marker = "extra == 'evm'", specifier = ">=0.5.0" },
@@ -234,6 +252,7 @@ requires-dist = [
     { name = "solana", marker = "extra == 'svm'", specifier = ">=0.36.0" },
     { name = "solders", marker = "extra == 'svm'", specifier = ">=0.27.0" },
     { name = "starlette", marker = "extra == 'fastapi'", specifier = ">=0.27.0" },
+    { name = "tronpy", marker = "extra == 'tron'", specifier = ">=0.6.0,<0.7.0" },
     { name = "typing-extensions", specifier = ">=4.0.0" },
     { name = "web3", marker = "extra == 'evm'", specifier = ">=7.0.0" },
 ]
@@ -268,16 +287,25 @@ name = "bankofai-x402-httpx-e2e"
 version = "0.1.0"
 source = { virtual = "." }
 dependencies = [
-    { name = "bankofai-x402", extra = ["evm", "extensions", "httpx", "svm"] },
+    { name = "bankofai-x402", extra = ["evm", "extensions", "httpx", "svm", "tron"] },
     { name = "python-dotenv" },
 ]
 
 [package.metadata]
 requires-dist = [
-    { name = "bankofai-x402", extras = ["httpx", "evm", "svm", "extensions"], editable = "../../../python/x402" },
+    { name = "bankofai-x402", extras = ["httpx", "evm", "svm", "tron", "extensions"], editable = "../../../python/x402" },
     { name = "python-dotenv", specifier = ">=1.0.0" },
 ]
 
+[[package]]
+name = "base58"
+version = "2.1.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/7f/45/8ae61209bb9015f516102fa559a2914178da1d5868428bd86a1b4421141d/base58-2.1.1.tar.gz", hash = "sha256:c5d0cb3f5b6e81e8e35da5754388ddcc6d0d14b6c6a132cb93d69ed580a7278c", size = 6528 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/4a/45/ec96b29162a402fc4c1c5512d114d7b3787b9d1c2ec241d9568b4816ee23/base58-2.1.1-py3-none-any.whl", hash = "sha256:11a36f4d3ce51dfc1043f3218591ac4eb1ceb172919cebe05b52a5bcc8d245c2", size = 5621 },
+]
+
 [[package]]
 name = "bitarray"
 version = "3.8.0"
@@ -373,6 +401,88 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/70/7d/9bc192684cea499815ff478dfcdc13835ddf401365057044fb721ec6bddb/certifi-2025.11.12-py3-none-any.whl", hash = "sha256:97de8790030bbd5c2d96b7ec782fc2f7820ef8dba6db909ccf95449f2d062d4b", size = 159438 },
 ]
 
+[[package]]
+name = "cffi"
+version = "2.0.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "pycparser", marker = "implementation_name != 'PyPy'" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/eb/56/b1ba7935a17738ae8453301356628e8147c79dbb825bcbc73dc7401f9846/cffi-2.0.0.tar.gz", hash = "sha256:44d1b5909021139fe36001ae048dbdde8214afa20200eda0f64c068cac5d5529", size = 523588 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/93/d7/516d984057745a6cd96575eea814fe1edd6646ee6efd552fb7b0921dec83/cffi-2.0.0-cp310-cp310-macosx_10_13_x86_64.whl", hash = "sha256:0cf2d91ecc3fcc0625c2c530fe004f82c110405f101548512cce44322fa8ac44", size = 184283 },
+    { url = "https://files.pythonhosted.org/packages/9e/84/ad6a0b408daa859246f57c03efd28e5dd1b33c21737c2db84cae8c237aa5/cffi-2.0.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:f73b96c41e3b2adedc34a7356e64c8eb96e03a3782b535e043a986276ce12a49", size = 180504 },
+    { url = "https://files.pythonhosted.org/packages/50/bd/b1a6362b80628111e6653c961f987faa55262b4002fcec42308cad1db680/cffi-2.0.0-cp310-cp310-manylinux1_i686.manylinux2014_i686.manylinux_2_17_i686.manylinux_2_5_i686.whl", hash = "sha256:53f77cbe57044e88bbd5ed26ac1d0514d2acf0591dd6bb02a3ae37f76811b80c", size = 208811 },
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 [[package]]
 name = "charset-normalizer"
 version = "3.4.4"
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 ]
 
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+    { url = "https://files.pythonhosted.org/packages/99/54/260053f14f74b99b645084231e1c76994134ded49407a3bba23a8ffc0ff6/coincurve-20.0.0-cp312-cp312-win_amd64.whl", hash = "sha256:eacf9c0ce8739c84549a89c083b1f3526c8780b84517ee75d6b43d276e55f8a0", size = 1198932 },
+    { url = "https://files.pythonhosted.org/packages/b4/b5/c465e09345dd38b9415f5d47ae7683b3f461db02fcc03e699b6b5687ab2b/coincurve-20.0.0-cp312-cp312-win_arm64.whl", hash = "sha256:52a67bfddbd6224dfa42085c88ad176559801b57d6a8bd30d92ee040de88b7b3", size = 1193324 },
+]
+
 [[package]]
 name = "construct"
 version = "2.10.70"
@@ -1349,6 +1501,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/5b/5a/bc7b4a4ef808fa59a816c17b20c4bef6884daebbdf627ff2a161da67da19/propcache-0.4.1-py3-none-any.whl", hash = "sha256:af2a6052aeb6cf17d3e46ee169099044fd8224cbaf75c76a2ef596e8163e2237", size = 13305 },
 ]
 
+[[package]]
+name = "pycparser"
+version = "3.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/1b/7d/92392ff7815c21062bea51aa7b87d45576f649f16458d78b7cf94b9ab2e6/pycparser-3.0.tar.gz", hash = "sha256:600f49d217304a5902ac3c37e1281c9fe94e4d0489de643a9504c5cdfdfc6b29", size = 103492 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/0c/c3/44f3fbbfa403ea2a7c779186dc20772604442dde72947e7d01069cbe98e3/pycparser-3.0-py3-none-any.whl", hash = "sha256:b727414169a36b7d524c1c3e31839a521725078d7b2ff038656844266160a992", size = 48172 },
+]
+
 [[package]]
 name = "pycryptodome"
 version = "3.23.0"
@@ -1864,6 +2025,23 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/fb/12/5911ae3eeec47800503a238d971e51722ccea5feb8569b735184d5fcdbc0/toolz-1.1.0-py3-none-any.whl", hash = "sha256:15ccc861ac51c53696de0a5d6d4607f99c210739caf987b5d2054f3efed429d8", size = 58093 },
 ]
 
+[[package]]
+name = "tronpy"
+version = "0.6.2"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "base58" },
+    { name = "coincurve" },
+    { name = "eth-abi" },
+    { name = "httpx" },
+    { name = "pycryptodome" },
+    { name = "requests" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/1e/dd/7ef2690011ae8bf158c6ebf1b9a0c9b182d6c3caf53163733af9355bf000/tronpy-0.6.2.tar.gz", hash = "sha256:758bfc4f88d1e332d35b5e9e1d31173a40d8a91d2c177c218d7768f03973d45b", size = 206494 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/a0/cf/2e4f5bfefcfc9097c9fe4d8301d47ed0aeb35e91ca21ae70350d8ca02c51/tronpy-0.6.2-py3-none-any.whl", hash = "sha256:1d3f8595d372d3f0077a1f5e0a3869cd9edc58fca7dc54b1720d1ff26ade0b7a", size = 51111 },
+]
+
 [[package]]
 name = "types-requests"
 version = "2.32.4.20260107"
diff --git a/e2e/clients/mcp-python/uv.lock b/e2e/clients/mcp-python/uv.lock
index 394669e2..68de74a2 100644
--- a/e2e/clients/mcp-python/uv.lock
+++ b/e2e/clients/mcp-python/uv.lock
@@ -208,10 +208,11 @@ mcp = [
 
 [package.metadata]
 requires-dist = [
-    { name = "bankofai-x402", extras = ["evm", "svm"], marker = "extra == 'mechanisms'" },
     { name = "bankofai-x402", extras = ["flask", "fastapi"], marker = "extra == 'servers'" },
     { name = "bankofai-x402", extras = ["httpx", "requests"], marker = "extra == 'clients'" },
-    { name = "bankofai-x402", extras = ["httpx", "requests", "flask", "fastapi", "evm", "svm", "mcp", "extensions"], marker = "extra == 'all'" },
+    { name = "bankofai-x402", extras = ["httpx", "requests", "flask", "fastapi", "tron", "evm", "svm", "mcp", "extensions"], marker = "extra == 'all'" },
+    { name = "bankofai-x402", extras = ["tron", "evm", "svm"], marker = "extra == 'mechanisms'" },
+    { name = "base58", marker = "extra == 'tron'", specifier = ">=2.1.1" },
     { name = "eth-abi", marker = "extra == 'evm'", specifier = ">=5.0.0" },
     { name = "eth-account", marker = "extra == 'evm'", specifier = ">=0.12.0" },
     { name = "eth-keys", marker = "extra == 'evm'", specifier = ">=0.5.0" },
@@ -227,6 +228,7 @@ requires-dist = [
     { name = "solana", marker = "extra == 'svm'", specifier = ">=0.36.0" },
     { name = "solders", marker = "extra == 'svm'", specifier = ">=0.27.0" },
     { name = "starlette", marker = "extra == 'fastapi'", specifier = ">=0.27.0" },
+    { name = "tronpy", marker = "extra == 'tron'", specifier = ">=0.6.0,<0.7.0" },
     { name = "typing-extensions", specifier = ">=4.0.0" },
     { name = "web3", marker = "extra == 'evm'", specifier = ">=7.0.0" },
 ]
diff --git a/e2e/clients/requests/main.py b/e2e/clients/requests/main.py
index 654611d3..17f43e63 100644
--- a/e2e/clients/requests/main.py
+++ b/e2e/clients/requests/main.py
@@ -13,6 +13,8 @@
 from bankofai.x402.mechanisms.evm.exact import register_exact_evm_client
 from bankofai.x402.mechanisms.svm import KeypairSigner
 from bankofai.x402.mechanisms.svm.exact import register_exact_svm_client
+from bankofai.x402.mechanisms.tron.signers import ClientTronSigner
+from bankofai.x402.mechanisms.tron.exact import register_exact_tron_client
 
 # Load environment variables
 load_dotenv()
@@ -20,6 +22,8 @@
 # Get environment variables
 evm_private_key = os.getenv("EVM_PRIVATE_KEY")
 svm_private_key = os.getenv("SVM_PRIVATE_KEY")
+tron_private_key = os.getenv("TRON_PRIVATE_KEY")
+tron_rpc_url = os.getenv("TRON_RPC_URL")
 base_url = os.getenv("RESOURCE_SERVER_URL")
 endpoint_path = os.getenv("ENDPOINT_PATH")
 
@@ -52,6 +56,14 @@ def main():
         svm_signer = KeypairSigner.from_base58(svm_private_key)
         register_exact_svm_client(client, svm_signer)
 
+    # Register TRON exact scheme if private key is available
+    if tron_private_key:
+        tron_signer = ClientTronSigner(
+            private_key=tron_private_key,
+            full_node=tron_rpc_url or "https://nile.trongrid.io",
+        )
+        register_exact_tron_client(client, tron_signer)
+
     # Create a session with x402 payment handling
     session = x402_requests(client)
 
diff --git a/e2e/clients/requests/pyproject.toml b/e2e/clients/requests/pyproject.toml
index 70d362b8..0f0f30d2 100644
--- a/e2e/clients/requests/pyproject.toml
+++ b/e2e/clients/requests/pyproject.toml
@@ -5,7 +5,7 @@ description = "Python requests client for x402 e2e tests"
 requires-python = ">=3.10"
 dependencies = [
     "python-dotenv>=1.0.0",
-    "bankofai.x402[requests,evm,svm,extensions]"
+    "bankofai.x402[requests,evm,svm,tron,extensions]"
 ]
 
 [build-system]
diff --git a/e2e/clients/requests/test.config.json b/e2e/clients/requests/test.config.json
index 009e3eb0..9258aa42 100644
--- a/e2e/clients/requests/test.config.json
+++ b/e2e/clients/requests/test.config.json
@@ -4,14 +4,18 @@
   "language": "python",
   "protocolFamilies": [
     "evm",
-    "svm"
+    "svm",
+    "tron"
   ],
   "x402Versions": [
     1,
     2
   ],
   "evm": {
-    "transferMethods": ["eip3009"]
+    "transferMethods": ["eip3009", "permit2"]
+  },
+  "tron": {
+    "transferMethods": ["transferWithAuthorization", "permit2"]
   },
   "description": "Python requests client with x402 v2 HTTP adapter",
   "environment": {
@@ -21,7 +25,9 @@
     ],
     "optional": [
       "EVM_PRIVATE_KEY",
-      "SVM_PRIVATE_KEY"
+      "SVM_PRIVATE_KEY",
+      "TRON_PRIVATE_KEY",
+      "TRON_RPC_URL"
     ]
   }
-}
\ No newline at end of file
+}
diff --git a/e2e/clients/requests/uv.lock b/e2e/clients/requests/uv.lock
index ddb812b8..33ca65e0 100644
--- a/e2e/clients/requests/uv.lock
+++ b/e2e/clients/requests/uv.lock
@@ -1,5 +1,9 @@
 version = 1
 requires-python = ">=3.10"
+resolution-markers = [
+    "python_full_version == '3.14.*'",
+    "python_full_version != '3.14.*'",
+]
 
 [[package]]
 name = "aiohappyeyeballs"
@@ -166,6 +170,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/38/0e/27be9fdef66e72d64c0cdc3cc2823101b80585f8119b5c112c2e8f5f7dab/anyio-4.12.1-py3-none-any.whl", hash = "sha256:d405828884fc140aa80a3c667b8beed277f1dfedec42ba031bd6ac3db606ab6c", size = 113592 },
 ]
 
+[[package]]
+name = "asn1crypto"
+version = "1.5.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/de/cf/d547feed25b5244fcb9392e288ff9fdc3280b10260362fc45d37a798a6ee/asn1crypto-1.5.1.tar.gz", hash = "sha256:13ae38502be632115abf8a24cbe5f4da52e3b5231990aff31123c805306ccb9c", size = 121080 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/c9/7f/09065fd9e27da0eda08b4d6897f1c13535066174cc023af248fc2a8d5e5a/asn1crypto-1.5.1-py2.py3-none-any.whl", hash = "sha256:db4e40728b728508912cbb3d44f19ce188f218e9eba635821bb4b68564f8fd67", size = 105045 },
+]
+
 [[package]]
 name = "async-timeout"
 version = "5.0.1"
@@ -212,13 +225,18 @@ svm = [
     { name = "solana" },
     { name = "solders" },
 ]
+tron = [
+    { name = "base58" },
+    { name = "tronpy" },
+]
 
 [package.metadata]
 requires-dist = [
-    { name = "bankofai-x402", extras = ["evm", "svm"], marker = "extra == 'mechanisms'" },
     { name = "bankofai-x402", extras = ["flask", "fastapi"], marker = "extra == 'servers'" },
     { name = "bankofai-x402", extras = ["httpx", "requests"], marker = "extra == 'clients'" },
-    { name = "bankofai-x402", extras = ["httpx", "requests", "flask", "fastapi", "evm", "svm", "mcp", "extensions"], marker = "extra == 'all'" },
+    { name = "bankofai-x402", extras = ["httpx", "requests", "flask", "fastapi", "tron", "evm", "svm", "mcp", "extensions"], marker = "extra == 'all'" },
+    { name = "bankofai-x402", extras = ["tron", "evm", "svm"], marker = "extra == 'mechanisms'" },
+    { name = "base58", marker = "extra == 'tron'", specifier = ">=2.1.1" },
     { name = "eth-abi", marker = "extra == 'evm'", specifier = ">=5.0.0" },
     { name = "eth-account", marker = "extra == 'evm'", specifier = ">=0.12.0" },
     { name = "eth-keys", marker = "extra == 'evm'", specifier = ">=0.5.0" },
@@ -234,6 +252,7 @@ requires-dist = [
     { name = "solana", marker = "extra == 'svm'", specifier = ">=0.36.0" },
     { name = "solders", marker = "extra == 'svm'", specifier = ">=0.27.0" },
     { name = "starlette", marker = "extra == 'fastapi'", specifier = ">=0.27.0" },
+    { name = "tronpy", marker = "extra == 'tron'", specifier = ">=0.6.0,<0.7.0" },
     { name = "typing-extensions", specifier = ">=4.0.0" },
     { name = "web3", marker = "extra == 'evm'", specifier = ">=7.0.0" },
 ]
@@ -268,16 +287,25 @@ name = "bankofai-x402-requests-e2e"
 version = "0.1.0"
 source = { virtual = "." }
 dependencies = [
-    { name = "bankofai-x402", extra = ["evm", "extensions", "requests", "svm"] },
+    { name = "bankofai-x402", extra = ["evm", "extensions", "requests", "svm", "tron"] },
     { name = "python-dotenv" },
 ]
 
 [package.metadata]
 requires-dist = [
-    { name = "bankofai-x402", extras = ["requests", "evm", "svm", "extensions"], editable = "../../../python/x402" },
+    { name = "bankofai-x402", extras = ["requests", "evm", "svm", "tron", "extensions"], editable = "../../../python/x402" },
     { name = "python-dotenv", specifier = ">=1.0.0" },
 ]
 
+[[package]]
+name = "base58"
+version = "2.1.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/7f/45/8ae61209bb9015f516102fa559a2914178da1d5868428bd86a1b4421141d/base58-2.1.1.tar.gz", hash = "sha256:c5d0cb3f5b6e81e8e35da5754388ddcc6d0d14b6c6a132cb93d69ed580a7278c", size = 6528 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/4a/45/ec96b29162a402fc4c1c5512d114d7b3787b9d1c2ec241d9568b4816ee23/base58-2.1.1-py3-none-any.whl", hash = "sha256:11a36f4d3ce51dfc1043f3218591ac4eb1ceb172919cebe05b52a5bcc8d245c2", size = 5621 },
+]
+
 [[package]]
 name = "bitarray"
 version = "3.8.0"
@@ -373,6 +401,88 @@ wheels = [
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 ]
 
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+version = "2.0.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "pycparser", marker = "implementation_name != 'PyPy'" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/eb/56/b1ba7935a17738ae8453301356628e8147c79dbb825bcbc73dc7401f9846/cffi-2.0.0.tar.gz", hash = "sha256:44d1b5909021139fe36001ae048dbdde8214afa20200eda0f64c068cac5d5529", size = 523588 }
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+    { url = "https://files.pythonhosted.org/packages/b3/3a/898f5c12469b292042608dd0702bcb0420ec32bac6b1ca2a0dd790f922bd/coincurve-20.0.0-cp311-cp311-win_arm64.whl", hash = "sha256:594b840fc25d74118407edbbbc754b815f1bba9759dbf4f67f1c2b78396df2d3", size = 1193318 },
+    { url = "https://files.pythonhosted.org/packages/8f/24/e1bf259dd57186fbdc7cec51909db320884162cfad5ec72cbaa63573ff9d/coincurve-20.0.0-cp312-cp312-macosx_10_9_x86_64.whl", hash = "sha256:4df4416a6c0370d777aa725a25b14b04e45aa228da1251c258ff91444643f688", size = 1255671 },
+    { url = "https://files.pythonhosted.org/packages/0a/c5/1817f87d1cd5ff50d8537fe60fb96f66b76dd02da885d970952e6189a801/coincurve-20.0.0-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:1ccc3e4db55abf3fc0e604a187fdb05f0702bc5952e503d9a75f4ae6eeb4cb3a", size = 1255565 },
+    { url = "https://files.pythonhosted.org/packages/90/9f/35e15f993717ed1dcc4c26d9771f073a1054af26808a0f421783bb4cd7e0/coincurve-20.0.0-cp312-cp312-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:ac8335b1658a2ef5b3eb66d52647742fe8c6f413ad5b9d5310d7ea6d8060d40f", size = 1191953 },
+    { url = "https://files.pythonhosted.org/packages/4a/3d/6a9bc32e69b738b5e05f5027bace1da6722352a4a447e495d3c03a601d99/coincurve-20.0.0-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:c7ac025e485a0229fd5394e0bf6b4a75f8a4f6cee0dcf6f0b01a2ef05c5210ff", size = 1194425 },
+    { url = "https://files.pythonhosted.org/packages/1a/a6/15424973dc47fc7c87e3c0f8859f6f1b1032582ee9f1b85fdd5d1e33d630/coincurve-20.0.0-cp312-cp312-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:e46e3f1c21b3330857bcb1a3a5b942f645c8bce912a8a2b252216f34acfe4195", size = 1204678 },
+    { url = "https://files.pythonhosted.org/packages/6a/e7/71ddb4d66c11c4ad13e729362f8852e048ae452eba3dfcf57751842bb292/coincurve-20.0.0-cp312-cp312-musllinux_1_1_aarch64.whl", hash = "sha256:df9ff9b17a1d27271bf476cf3fa92df4c151663b11a55d8cea838b8f88d83624", size = 1215395 },
+    { url = "https://files.pythonhosted.org/packages/b9/7d/03e0a19cfff1d86f5d019afc69cfbff02caada701ed5a4a50abc63d4261c/coincurve-20.0.0-cp312-cp312-musllinux_1_1_i686.whl", hash = "sha256:4155759f071375699282e03b3d95fb473ee05c022641c077533e0d906311e57a", size = 1204552 },
+    { url = "https://files.pythonhosted.org/packages/07/cd/e9bd4ca7d931653a35c74194da04191a9aecc54b8f48a554cd538dc810e4/coincurve-20.0.0-cp312-cp312-musllinux_1_1_x86_64.whl", hash = "sha256:0530b9dd02fc6f6c2916716974b79bdab874227f560c422801ade290e3fc5013", size = 1209392 },
+    { url = "https://files.pythonhosted.org/packages/99/54/260053f14f74b99b645084231e1c76994134ded49407a3bba23a8ffc0ff6/coincurve-20.0.0-cp312-cp312-win_amd64.whl", hash = "sha256:eacf9c0ce8739c84549a89c083b1f3526c8780b84517ee75d6b43d276e55f8a0", size = 1198932 },
+    { url = "https://files.pythonhosted.org/packages/b4/b5/c465e09345dd38b9415f5d47ae7683b3f461db02fcc03e699b6b5687ab2b/coincurve-20.0.0-cp312-cp312-win_arm64.whl", hash = "sha256:52a67bfddbd6224dfa42085c88ad176559801b57d6a8bd30d92ee040de88b7b3", size = 1193324 },
+]
+
 [[package]]
 name = "construct"
 version = "2.10.70"
@@ -1349,6 +1501,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/5b/5a/bc7b4a4ef808fa59a816c17b20c4bef6884daebbdf627ff2a161da67da19/propcache-0.4.1-py3-none-any.whl", hash = "sha256:af2a6052aeb6cf17d3e46ee169099044fd8224cbaf75c76a2ef596e8163e2237", size = 13305 },
 ]
 
+[[package]]
+name = "pycparser"
+version = "3.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/1b/7d/92392ff7815c21062bea51aa7b87d45576f649f16458d78b7cf94b9ab2e6/pycparser-3.0.tar.gz", hash = "sha256:600f49d217304a5902ac3c37e1281c9fe94e4d0489de643a9504c5cdfdfc6b29", size = 103492 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/0c/c3/44f3fbbfa403ea2a7c779186dc20772604442dde72947e7d01069cbe98e3/pycparser-3.0-py3-none-any.whl", hash = "sha256:b727414169a36b7d524c1c3e31839a521725078d7b2ff038656844266160a992", size = 48172 },
+]
+
 [[package]]
 name = "pycryptodome"
 version = "3.23.0"
@@ -1864,6 +2025,23 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/fb/12/5911ae3eeec47800503a238d971e51722ccea5feb8569b735184d5fcdbc0/toolz-1.1.0-py3-none-any.whl", hash = "sha256:15ccc861ac51c53696de0a5d6d4607f99c210739caf987b5d2054f3efed429d8", size = 58093 },
 ]
 
+[[package]]
+name = "tronpy"
+version = "0.6.2"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "base58" },
+    { name = "coincurve" },
+    { name = "eth-abi" },
+    { name = "httpx" },
+    { name = "pycryptodome" },
+    { name = "requests" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/1e/dd/7ef2690011ae8bf158c6ebf1b9a0c9b182d6c3caf53163733af9355bf000/tronpy-0.6.2.tar.gz", hash = "sha256:758bfc4f88d1e332d35b5e9e1d31173a40d8a91d2c177c218d7768f03973d45b", size = 206494 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/a0/cf/2e4f5bfefcfc9097c9fe4d8301d47ed0aeb35e91ca21ae70350d8ca02c51/tronpy-0.6.2-py3-none-any.whl", hash = "sha256:1d3f8595d372d3f0077a1f5e0a3869cd9edc58fca7dc54b1720d1ff26ade0b7a", size = 51111 },
+]
+
 [[package]]
 name = "types-requests"
 version = "2.32.4.20260107"
diff --git a/e2e/facilitators/python/main.py b/e2e/facilitators/python/main.py
index 1e82d86f..59a6d45c 100644
--- a/e2e/facilitators/python/main.py
+++ b/e2e/facilitators/python/main.py
@@ -28,6 +28,11 @@
 from bankofai.x402.mechanisms.evm.exact import register_exact_evm_facilitator
 from bankofai.x402.mechanisms.svm import FacilitatorKeypairSigner
 from bankofai.x402.mechanisms.svm.exact import register_exact_svm_facilitator
+from bankofai.x402.mechanisms.tron.signers import FacilitatorTronSigner
+from bankofai.x402.mechanisms.tron.exact import register_exact_tron_facilitator
+from bankofai.x402.extensions.trc20_approval_gas_sponsoring import (
+    create_trc20_approval_gas_sponsoring_extension,
+)
 
 from bazaar import BazaarCatalog
 
@@ -47,6 +52,8 @@
 
 if not os.environ.get("SVM_PRIVATE_KEY"):
     print("⚠️  SVM_PRIVATE_KEY not set — SVM payment support disabled")
+if not os.environ.get("TRON_PRIVATE_KEY"):
+    print("⚠️  TRON_PRIVATE_KEY not set — TRON payment support disabled")
 
 # Initialize the EVM signer from private key
 evm_rpc_url = os.environ.get("EVM_RPC_URL") or "https://bsc-testnet-rpc.publicnode.com"
@@ -63,6 +70,16 @@
     svm_signer = FacilitatorKeypairSigner(svm_keypair)
     print(f"SVM Facilitator account: {svm_signer.get_addresses()[0]}")
 
+# Initialize the TRON signer from private key (optional)
+tron_signer = None
+if os.environ.get("TRON_PRIVATE_KEY"):
+    tron_full_node = os.environ.get("TRON_RPC_URL") or "https://nile.trongrid.io"
+    tron_signer = FacilitatorTronSigner(
+        private_key=os.environ["TRON_PRIVATE_KEY"],
+        full_node=tron_full_node,
+    )
+    print(f"TRON Facilitator account: {tron_signer.get_addresses()[0]}")
+
 
 def _handle_after_verify(ctx: Any) -> None:
     """Handle after verify hook - extract discovery info and catalog."""
@@ -120,7 +137,7 @@ def _handle_after_verify(ctx: Any) -> None:
 register_exact_evm_facilitator(
     facilitator,
     evm_signer,
-    networks="eip155:97",  # BSC Testnet
+    networks=os.environ.get("EVM_NETWORK", "eip155:97"),  # BSC Testnet default
     deploy_erc4337_with_eip6492=True,
 )
 
@@ -132,6 +149,17 @@ def _handle_after_verify(ctx: Any) -> None:
         networks="solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1",  # Devnet
     )
 
+# Register TRON schemes (V1 and V2) if configured
+if tron_signer:
+    facilitator.register_extension(
+        create_trc20_approval_gas_sponsoring_extension(tron_signer)
+    )
+    register_exact_tron_facilitator(
+        facilitator,
+        tron_signer,
+        networks=os.environ.get("TRON_NETWORK", "tron:nile"),
+    )
+
 
 # Pydantic models for request/response
 class VerifyRequest(BaseModel):
diff --git a/e2e/facilitators/python/pyproject.toml b/e2e/facilitators/python/pyproject.toml
index a9785bb4..6af1caa1 100644
--- a/e2e/facilitators/python/pyproject.toml
+++ b/e2e/facilitators/python/pyproject.toml
@@ -4,7 +4,7 @@ version = "0.1.0"
 description = "Python facilitator for x402 e2e testing"
 requires-python = ">=3.10"
 dependencies = [
-    "bankofai.x402[fastapi,evm,svm,extensions]",
+    "bankofai.x402[fastapi,evm,svm,tron,extensions]",
     "python-dotenv>=1.2.1",
     "uvicorn[standard]>=0.40.0",
 ]
@@ -14,4 +14,3 @@ package = false
 
 [tool.uv.sources]
 "bankofai.x402" = { path = "../../../python/x402", editable = true }
-
diff --git a/e2e/facilitators/python/test.config.json b/e2e/facilitators/python/test.config.json
index 028f8da2..4bd4af45 100644
--- a/e2e/facilitators/python/test.config.json
+++ b/e2e/facilitators/python/test.config.json
@@ -4,7 +4,8 @@
   "language": "python",
   "protocolFamilies": [
     "evm",
-    "svm"
+    "svm",
+    "tron"
   ],
   "x402Versions": [
     1,
@@ -14,7 +15,10 @@
     "bazaar"
   ],
   "evm": {
-    "transferMethods": ["eip3009"]
+    "transferMethods": ["eip3009", "permit2"]
+  },
+  "tron": {
+    "transferMethods": ["transferWithAuthorization", "permit2"]
   },
   "environment": {
     "required": [
@@ -23,10 +27,12 @@
     ],
     "optional": [
       "SVM_PRIVATE_KEY",
+      "TRON_PRIVATE_KEY",
       "EVM_NETWORK",
       "SVM_NETWORK",
-      "EVM_RPC_URL"
+      "EVM_RPC_URL",
+      "TRON_NETWORK",
+      "TRON_RPC_URL"
     ]
   }
 }
-
diff --git a/e2e/facilitators/python/uv.lock b/e2e/facilitators/python/uv.lock
index 245695a7..14690020 100644
--- a/e2e/facilitators/python/uv.lock
+++ b/e2e/facilitators/python/uv.lock
@@ -1,5 +1,9 @@
 version = 1
 requires-python = ">=3.10"
+resolution-markers = [
+    "python_full_version == '3.14.*'",
+    "python_full_version != '3.14.*'",
+]
 
 [[package]]
 name = "aiohappyeyeballs"
@@ -175,6 +179,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/38/0e/27be9fdef66e72d64c0cdc3cc2823101b80585f8119b5c112c2e8f5f7dab/anyio-4.12.1-py3-none-any.whl", hash = "sha256:d405828884fc140aa80a3c667b8beed277f1dfedec42ba031bd6ac3db606ab6c", size = 113592 },
 ]
 
+[[package]]
+name = "asn1crypto"
+version = "1.5.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/de/cf/d547feed25b5244fcb9392e288ff9fdc3280b10260362fc45d37a798a6ee/asn1crypto-1.5.1.tar.gz", hash = "sha256:13ae38502be632115abf8a24cbe5f4da52e3b5231990aff31123c805306ccb9c", size = 121080 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/c9/7f/09065fd9e27da0eda08b4d6897f1c13535066174cc023af248fc2a8d5e5a/asn1crypto-1.5.1-py2.py3-none-any.whl", hash = "sha256:db4e40728b728508912cbb3d44f19ce188f218e9eba635821bb4b68564f8fd67", size = 105045 },
+]
+
 [[package]]
 name = "async-timeout"
 version = "5.0.1"
@@ -222,13 +235,18 @@ svm = [
     { name = "solana" },
     { name = "solders" },
 ]
+tron = [
+    { name = "base58" },
+    { name = "tronpy" },
+]
 
 [package.metadata]
 requires-dist = [
-    { name = "bankofai-x402", extras = ["evm", "svm"], marker = "extra == 'mechanisms'" },
     { name = "bankofai-x402", extras = ["flask", "fastapi"], marker = "extra == 'servers'" },
     { name = "bankofai-x402", extras = ["httpx", "requests"], marker = "extra == 'clients'" },
-    { name = "bankofai-x402", extras = ["httpx", "requests", "flask", "fastapi", "evm", "svm", "mcp", "extensions"], marker = "extra == 'all'" },
+    { name = "bankofai-x402", extras = ["httpx", "requests", "flask", "fastapi", "tron", "evm", "svm", "mcp", "extensions"], marker = "extra == 'all'" },
+    { name = "bankofai-x402", extras = ["tron", "evm", "svm"], marker = "extra == 'mechanisms'" },
+    { name = "base58", marker = "extra == 'tron'", specifier = ">=2.1.1" },
     { name = "eth-abi", marker = "extra == 'evm'", specifier = ">=5.0.0" },
     { name = "eth-account", marker = "extra == 'evm'", specifier = ">=0.12.0" },
     { name = "eth-keys", marker = "extra == 'evm'", specifier = ">=0.5.0" },
@@ -244,6 +262,7 @@ requires-dist = [
     { name = "solana", marker = "extra == 'svm'", specifier = ">=0.36.0" },
     { name = "solders", marker = "extra == 'svm'", specifier = ">=0.27.0" },
     { name = "starlette", marker = "extra == 'fastapi'", specifier = ">=0.27.0" },
+    { name = "tronpy", marker = "extra == 'tron'", specifier = ">=0.6.0,<0.7.0" },
     { name = "typing-extensions", specifier = ">=4.0.0" },
     { name = "web3", marker = "extra == 'evm'", specifier = ">=7.0.0" },
 ]
@@ -278,18 +297,27 @@ name = "bankofai-x402-e2e-facilitator-python"
 version = "0.1.0"
 source = { virtual = "." }
 dependencies = [
-    { name = "bankofai-x402", extra = ["evm", "extensions", "fastapi", "svm"] },
+    { name = "bankofai-x402", extra = ["evm", "extensions", "fastapi", "svm", "tron"] },
     { name = "python-dotenv" },
     { name = "uvicorn", extra = ["standard"] },
 ]
 
 [package.metadata]
 requires-dist = [
-    { name = "bankofai-x402", extras = ["fastapi", "evm", "svm", "extensions"], editable = "../../../python/x402" },
+    { name = "bankofai-x402", extras = ["fastapi", "evm", "svm", "tron", "extensions"], editable = "../../../python/x402" },
     { name = "python-dotenv", specifier = ">=1.2.1" },
     { name = "uvicorn", extras = ["standard"], specifier = ">=0.40.0" },
 ]
 
+[[package]]
+name = "base58"
+version = "2.1.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/7f/45/8ae61209bb9015f516102fa559a2914178da1d5868428bd86a1b4421141d/base58-2.1.1.tar.gz", hash = "sha256:c5d0cb3f5b6e81e8e35da5754388ddcc6d0d14b6c6a132cb93d69ed580a7278c", size = 6528 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/4a/45/ec96b29162a402fc4c1c5512d114d7b3787b9d1c2ec241d9568b4816ee23/base58-2.1.1-py3-none-any.whl", hash = "sha256:11a36f4d3ce51dfc1043f3218591ac4eb1ceb172919cebe05b52a5bcc8d245c2", size = 5621 },
+]
+
 [[package]]
 name = "bitarray"
 version = "3.8.0"
@@ -385,6 +413,88 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/e6/ad/3cc14f097111b4de0040c83a525973216457bbeeb63739ef1ed275c1c021/certifi-2026.1.4-py3-none-any.whl", hash = "sha256:9943707519e4add1115f44c2bc244f782c0249876bf51b6599fee1ffbedd685c", size = 152900 },
 ]
 
+[[package]]
+name = "cffi"
+version = "2.0.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "pycparser", marker = "implementation_name != 'PyPy'" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/eb/56/b1ba7935a17738ae8453301356628e8147c79dbb825bcbc73dc7401f9846/cffi-2.0.0.tar.gz", hash = "sha256:44d1b5909021139fe36001ae048dbdde8214afa20200eda0f64c068cac5d5529", size = 523588 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/93/d7/516d984057745a6cd96575eea814fe1edd6646ee6efd552fb7b0921dec83/cffi-2.0.0-cp310-cp310-macosx_10_13_x86_64.whl", hash = "sha256:0cf2d91ecc3fcc0625c2c530fe004f82c110405f101548512cce44322fa8ac44", size = 184283 },
+    { url = "https://files.pythonhosted.org/packages/9e/84/ad6a0b408daa859246f57c03efd28e5dd1b33c21737c2db84cae8c237aa5/cffi-2.0.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:f73b96c41e3b2adedc34a7356e64c8eb96e03a3782b535e043a986276ce12a49", size = 180504 },
+    { url = "https://files.pythonhosted.org/packages/50/bd/b1a6362b80628111e6653c961f987faa55262b4002fcec42308cad1db680/cffi-2.0.0-cp310-cp310-manylinux1_i686.manylinux2014_i686.manylinux_2_17_i686.manylinux_2_5_i686.whl", hash = "sha256:53f77cbe57044e88bbd5ed26ac1d0514d2acf0591dd6bb02a3ae37f76811b80c", size = 208811 },
+    { url = "https://files.pythonhosted.org/packages/4f/27/6933a8b2562d7bd1fb595074cf99cc81fc3789f6a6c05cdabb46284a3188/cffi-2.0.0-cp310-cp310-manylinux2014_aarch64.manylinux_2_17_aarch64.whl", hash = "sha256:3e837e369566884707ddaf85fc1744b47575005c0a229de3327f8f9a20f4efeb", size = 216402 },
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+
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 version = "0.4.6"
@@ -1753,6 +1905,15 @@ wheels = [
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+[[package]]
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+version = "3.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/1b/7d/92392ff7815c21062bea51aa7b87d45576f649f16458d78b7cf94b9ab2e6/pycparser-3.0.tar.gz", hash = "sha256:600f49d217304a5902ac3c37e1281c9fe94e4d0489de643a9504c5cdfdfc6b29", size = 103492 }
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 name = "pycryptodome"
 version = "3.23.0"
@@ -2619,6 +2780,23 @@ wheels = [
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+[[package]]
+name = "tronpy"
+version = "0.6.2"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "base58" },
+    { name = "coincurve" },
+    { name = "eth-abi" },
+    { name = "httpx" },
+    { name = "pycryptodome" },
+    { name = "requests" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/1e/dd/7ef2690011ae8bf158c6ebf1b9a0c9b182d6c3caf53163733af9355bf000/tronpy-0.6.2.tar.gz", hash = "sha256:758bfc4f88d1e332d35b5e9e1d31173a40d8a91d2c177c218d7768f03973d45b", size = 206494 }
+wheels = [
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+
 [[package]]
 name = "typer"
 version = "0.21.1"
diff --git a/e2e/facilitators/typescript/index.ts b/e2e/facilitators/typescript/index.ts
index 86201922..3ec21609 100644
--- a/e2e/facilitators/typescript/index.ts
+++ b/e2e/facilitators/typescript/index.ts
@@ -44,9 +44,12 @@ import { ExactSvmSchemeV1 } from "@bankofai/x402-svm/exact/v1/facilitator";
 import { NETWORKS as SVM_V1_NETWORKS } from "@bankofai/x402-svm/v1";
 import { createEd25519Signer, type FacilitatorStellarSigner } from "@bankofai/x402-stellar";
 import { ExactStellarScheme } from "@bankofai/x402-stellar/exact/facilitator";
+import { createFacilitatorTronSigner } from "@bankofai/x402-tron";
+import { registerExactTronScheme } from "@bankofai/x402-tron/exact/facilitator";
 import crypto from "crypto";
 import dotenv from "dotenv";
 import express from "express";
+import { TronWeb } from "tronweb";
 import { createWalletClient, http, publicActions, Chain } from "viem";
 import { privateKeyToAccount } from "viem/accounts";
 import { bscTestnet, base } from "viem/chains";
@@ -61,10 +64,13 @@ const SVM_NETWORK =
   process.env.SVM_NETWORK || "solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1";
 const APTOS_NETWORK = process.env.APTOS_NETWORK || "aptos:2";
 const STELLAR_NETWORK = process.env.STELLAR_NETWORK || "stellar:testnet";
+const TRON_NETWORK = process.env.TRON_NETWORK || "tron:nile";
 const EVM_RPC_URL = process.env.EVM_RPC_URL;
 const SVM_RPC_URL = process.env.SVM_RPC_URL;
 const APTOS_RPC_URL = process.env.APTOS_RPC_URL;
 const STELLAR_RPC_URL = process.env.STELLAR_RPC_URL;
+const TRON_RPC_URL = process.env.TRON_RPC_URL;
+const TRON_GRID_API_KEY = process.env.TRON_GRID_API_KEY;
 
 // Map CAIP-2 network IDs to viem chains
 function getEvmChain(network: string): Chain {
@@ -81,10 +87,12 @@ console.log(`🌐 EVM Network: ${EVM_NETWORK}`);
 console.log(`🌐 SVM Network: ${SVM_NETWORK}`);
 console.log(`🌐 Aptos Network: ${APTOS_NETWORK}`);
 console.log(`🌐 Stellar Network: ${STELLAR_NETWORK}`);
+console.log(`🌐 TRON Network: ${TRON_NETWORK}`);
 if (EVM_RPC_URL) console.log(`🌐 EVM RPC URL: ${EVM_RPC_URL}`);
 if (SVM_RPC_URL) console.log(`🌐 SVM RPC URL: ${SVM_RPC_URL}`);
 if (APTOS_RPC_URL) console.log(`🌐 Aptos RPC URL: ${APTOS_RPC_URL}`);
 if (STELLAR_RPC_URL) console.log(`🌐 Stellar RPC URL: ${STELLAR_RPC_URL}`);
+if (TRON_RPC_URL) console.log(`🌐 TRON RPC URL: ${TRON_RPC_URL}`);
 
 // Validate required environment variables
 if (!process.env.EVM_PRIVATE_KEY) {
@@ -95,6 +103,9 @@ if (!process.env.EVM_PRIVATE_KEY) {
 if (!process.env.SVM_PRIVATE_KEY) {
   console.warn("⚠️  SVM_PRIVATE_KEY not set — SVM payment support disabled");
 }
+if (!process.env.TRON_PRIVATE_KEY) {
+  console.warn("⚠️  TRON_PRIVATE_KEY not set — TRON payment support disabled");
+}
 
 // Initialize the EVM account from private key
 const evmAccount = privateKeyToAccount(
@@ -132,6 +143,30 @@ if (process.env.STELLAR_PRIVATE_KEY) {
   console.info(`Stellar Facilitator account: ${stellarSigner.address}`);
 }
 
+function resolveTronRpcUrl(network: string): string {
+  if (TRON_RPC_URL) {
+    return TRON_RPC_URL;
+  }
+  if (network === "tron:mainnet") {
+    return "https://api.trongrid.io";
+  }
+  if (network === "tron:shasta") {
+    return "https://api.shasta.trongrid.io";
+  }
+  return "https://nile.trongrid.io";
+}
+
+let tronSigner: ReturnType<typeof createFacilitatorTronSigner> | undefined;
+if (process.env.TRON_PRIVATE_KEY) {
+  const tronWeb = new TronWeb({
+    fullHost: resolveTronRpcUrl(TRON_NETWORK),
+    privateKey: process.env.TRON_PRIVATE_KEY,
+    headers: TRON_GRID_API_KEY ? { "TRON-PRO-API-KEY": TRON_GRID_API_KEY } : undefined,
+  });
+  tronSigner = createFacilitatorTronSigner(tronWeb, process.env.TRON_PRIVATE_KEY);
+  console.info(`TRON Facilitator account: ${tronSigner.address}`);
+}
+
 // Create a Viem client with both wallet and public capabilities
 const evmChain = getEvmChain(EVM_NETWORK);
 const viemClient = createWalletClient({
@@ -227,6 +262,12 @@ if (aptosSigner) {
 if (stellarSigner) {
   facilitator.register(STELLAR_NETWORK as Network, new ExactStellarScheme([stellarSigner]));
 }
+if (tronSigner) {
+  registerExactTronScheme(facilitator, {
+    signer: tronSigner,
+    networks: TRON_NETWORK as Network,
+  });
+}
 
 facilitator
   .registerExtension(BAZAAR)
@@ -427,6 +468,7 @@ app.get("/health", (req, res) => {
     svmNetwork: SVM_NETWORK,
     aptosNetwork: aptosAccount ? APTOS_NETWORK : "(not configured)",
     stellarNetwork: stellarSigner ? STELLAR_NETWORK : "(not configured)",
+    tronNetwork: tronSigner ? TRON_NETWORK : "(not configured)",
     facilitator: "typescript",
     version: "2.0.0",
     extensions: [BAZAAR.key],
@@ -458,9 +500,11 @@ app.listen(parseInt(PORT), () => {
 ║  EVM Network:  ${EVM_NETWORK}                          ║
 ║  SVM Network:  ${SVM_NETWORK}                          ║
 ║  Aptos Network: ${APTOS_NETWORK}                       ║
+║  TRON Network: ${TRON_NETWORK}                         ║
 ║  EVM Address:  ${evmAccount.address}                   ║
 ║  Aptos Address: ${aptosAccount ? aptosAccount.accountAddress.toStringLong().slice(0, 20) + "..." : "(not configured)"}
 ║  Stellar Address: ${stellarSigner ? stellarSigner.address : "(not configured)"} ║
+║  TRON Address: ${tronSigner ? tronSigner.address : "(not configured)"} ║
 ║  Extensions:   bazaar                                  ║
 ║                                                        ║
 ║  Endpoints:                                            ║
diff --git a/e2e/facilitators/typescript/package.json b/e2e/facilitators/typescript/package.json
index 9ae8c214..419aa768 100644
--- a/e2e/facilitators/typescript/package.json
+++ b/e2e/facilitators/typescript/package.json
@@ -20,9 +20,11 @@
     "@bankofai/x402-evm": "workspace:*",
     "@bankofai/x402-extensions": "workspace:*",
     "@bankofai/x402-stellar": "workspace:*",
+    "@bankofai/x402-tron": "workspace:*",
     "@bankofai/x402-svm": "workspace:*",
     "dotenv": "^16.4.5",
     "express": "^4.19.2",
+    "tronweb": "^6.1.0",
     "viem": "^2.21.54"
   },
   "devDependencies": {
@@ -33,4 +35,4 @@
     "tsx": "^4.19.2",
     "typescript": "^5.7.2"
   }
-}
\ No newline at end of file
+}
diff --git a/e2e/facilitators/typescript/test.config.json b/e2e/facilitators/typescript/test.config.json
index c934d421..66382b37 100644
--- a/e2e/facilitators/typescript/test.config.json
+++ b/e2e/facilitators/typescript/test.config.json
@@ -6,7 +6,8 @@
     "evm",
     "svm",
     "aptos",
-    "stellar"
+    "stellar",
+    "tron"
   ],
   "x402Versions": [
     1,
@@ -23,12 +24,16 @@
   "environment": {
     "required": [
       "PORT",
-      "EVM_PRIVATE_KEY"
+      "EVM_PRIVATE_KEY",
+      "TRON_PRIVATE_KEY"
     ],
     "optional": [
       "SVM_PRIVATE_KEY",
       "APTOS_PRIVATE_KEY",
       "STELLAR_PRIVATE_KEY",
+      "TRON_NETWORK",
+      "TRON_RPC_URL",
+      "TRON_GRID_API_KEY",
       "EVM_NETWORK",
       "SVM_NETWORK",
       "APTOS_NETWORK",
diff --git a/e2e/pnpm-lock.yaml b/e2e/pnpm-lock.yaml
index 182899e0..7c10b6b9 100644
--- a/e2e/pnpm-lock.yaml
+++ b/e2e/pnpm-lock.yaml
@@ -1363,6 +1363,9 @@ importers:
       '@bankofai/x402-core':
         specifier: workspace:*
         version: link:../../core
+      '@bankofai/x402-extensions':
+        specifier: workspace:*
+        version: link:../../extensions
       tronweb:
         specifier: ^6.1.0
         version: 6.2.2(bufferutil@4.0.9)(utf-8-validate@5.0.10)
@@ -1723,6 +1726,9 @@ importers:
       '@bankofai/x402-svm':
         specifier: workspace:*
         version: link:../../../typescript/packages/mechanisms/svm
+      '@bankofai/x402-tron':
+        specifier: workspace:*
+        version: link:../../../typescript/packages/mechanisms/tron
       '@scure/base':
         specifier: ^1.2.6
         version: 1.2.6
@@ -1735,6 +1741,9 @@ importers:
       express:
         specifier: ^4.19.2
         version: 4.21.2
+      tronweb:
+        specifier: ^6.1.0
+        version: 6.2.2(bufferutil@4.0.9)(utf-8-validate@5.0.10)
       viem:
         specifier: ^2.21.54
         version: 2.38.3(bufferutil@4.0.9)(typescript@5.8.3)(utf-8-validate@5.0.10)(zod@4.1.12)
diff --git a/e2e/scripts/permit2-approval.ts b/e2e/scripts/permit2-approval.ts
index 0cf622a0..29064ae3 100644
--- a/e2e/scripts/permit2-approval.ts
+++ b/e2e/scripts/permit2-approval.ts
@@ -25,8 +25,8 @@ import { bscTestnet } from 'viem/chains';
 
 config();
 
-// Permit2 canonical address (same on all EVM chains)
-const PERMIT2_ADDRESS = '0x000000000022D473030F116dDEE9F6B43aC78BA3';
+// BSC uses PancakeSwap's Permit2 deployment (not the canonical address).
+const PERMIT2_ADDRESS = '0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768';
 
 // Known tokens on BSC Testnet
 const TOKENS: Record<string, { address: `0x${string}`; decimals: number; name: string }> = {
diff --git a/e2e/servers/express/index.ts b/e2e/servers/express/index.ts
index 9cdc66c3..8056180b 100644
--- a/e2e/servers/express/index.ts
+++ b/e2e/servers/express/index.ts
@@ -31,6 +31,7 @@ const SVM_NETWORK = (process.env.SVM_NETWORK ||
 const APTOS_NETWORK = (process.env.APTOS_NETWORK || "aptos:2") as `${string}:${string}`;
 const STELLAR_NETWORK = (process.env.STELLAR_NETWORK || "stellar:testnet") as `${string}:${string}`;
 const EVM_PAYEE_ADDRESS = process.env.EVM_PAYEE_ADDRESS as `0x${string}`;
+const EVM_FACILITATOR_ADDRESS = process.env.EVM_FACILITATOR_ADDRESS as `0x${string}` | undefined;
 const SVM_PAYEE_ADDRESS = process.env.SVM_PAYEE_ADDRESS as string;
 const APTOS_PAYEE_ADDRESS = process.env.APTOS_PAYEE_ADDRESS as string;
 const STELLAR_PAYEE_ADDRESS = process.env.STELLAR_PAYEE_ADDRESS as string | undefined;
@@ -49,6 +50,11 @@ if (!facilitatorUrl) {
   console.error("❌ FACILITATOR_URL environment variable is required");
   process.exit(1);
 }
+if (!EVM_FACILITATOR_ADDRESS) {
+  console.warn(
+    "⚠️  EVM_FACILITATOR_ADDRESS not set — Permit2 endpoints disabled",
+  );
+}
 
 // Initialize Express app
 const app = express();
@@ -215,63 +221,69 @@ app.use(
             },
           }
         : {}),
-      // Permit2 endpoint for generic ERC-20 tokens (no EIP-2612, uses raw approve tx)
-      "GET /protected-permit2-erc20": {
-        accepts: {
-          payTo: EVM_PAYEE_ADDRESS,
-          scheme: "exact",
-          network: EVM_NETWORK,
-          assets: ["DHLU"],
-          price: {
-            amount: "1000",
-            asset: "0x375cADdd2cB68cE82e3D9B075D551067a7b4B816", // DHLU (ERC-20 approval path, no name/version)
-            extra: {
-              assetTransferMethod: "permit2",
-            },
-          },
-        },
-        extensions: {
-          ...declareErc20ApprovalGasSponsoringExtension(),
-        },
-      },
-      // Permit2 endpoint - explicitly requires Permit2 flow instead of EIP-3009
-      "GET /protected-permit2": {
-        accepts: {
-          payTo: EVM_PAYEE_ADDRESS,
-          scheme: "exact",
-          network: EVM_NETWORK,
-          assets: ["DHLU"],
-          price: {
-            amount: "1000",
-            asset: "0x375cADdd2cB68cE82e3D9B075D551067a7b4B816", // DHLU (permit2 + EIP-2612 path)
-            extra: {
-              name: "DA HULU",
-              version: "1",
-              assetTransferMethod: "permit2",
-            },
-          },
-        },
-        extensions: {
-          ...declareDiscoveryExtension({
-            output: {
-              example: {
-                message: "Permit2 endpoint accessed successfully",
-                timestamp: "2024-01-01T00:00:00Z",
-                method: "permit2",
+      ...(EVM_FACILITATOR_ADDRESS
+        ? {
+            // Permit2 endpoint for generic ERC-20 tokens (no EIP-2612, uses raw approve tx)
+            "GET /protected-permit2-erc20": {
+              accepts: {
+                payTo: EVM_PAYEE_ADDRESS,
+                scheme: "exact",
+                network: EVM_NETWORK,
+                assets: ["DHLU"],
+                price: {
+                  amount: "1000",
+                  asset: "0x375cADdd2cB68cE82e3D9B075D551067a7b4B816", // DHLU (ERC-20 approval path, no name/version)
+                  extra: {
+                    assetTransferMethod: "permit2",
+                    permit2FacilitatorAddress: EVM_FACILITATOR_ADDRESS,
+                  },
+                },
               },
-              schema: {
-                properties: {
-                  message: { type: "string" },
-                  timestamp: { type: "string" },
-                  method: { type: "string" },
+              extensions: {
+                ...declareErc20ApprovalGasSponsoringExtension(),
+              },
+            },
+            // Permit2 endpoint - explicitly requires Permit2 flow instead of EIP-3009
+            "GET /protected-permit2": {
+              accepts: {
+                payTo: EVM_PAYEE_ADDRESS,
+                scheme: "exact",
+                network: EVM_NETWORK,
+                assets: ["DHLU"],
+                price: {
+                  amount: "1000",
+                  asset: "0x375cADdd2cB68cE82e3D9B075D551067a7b4B816", // DHLU (permit2 + EIP-2612 path)
+                  extra: {
+                    name: "DA HULU",
+                    version: "1",
+                    assetTransferMethod: "permit2",
+                    permit2FacilitatorAddress: EVM_FACILITATOR_ADDRESS,
+                  },
                 },
-                required: ["message", "timestamp", "method"],
+              },
+              extensions: {
+                ...declareDiscoveryExtension({
+                  output: {
+                    example: {
+                      message: "Permit2 endpoint accessed successfully",
+                      timestamp: "2024-01-01T00:00:00Z",
+                      method: "permit2",
+                    },
+                    schema: {
+                      properties: {
+                        message: { type: "string" },
+                        timestamp: { type: "string" },
+                        method: { type: "string" },
+                      },
+                      required: ["message", "timestamp", "method"],
+                    },
+                  },
+                }),
+                ...declareEip2612GasSponsoringExtension(),
               },
             },
-          }),
-          ...declareEip2612GasSponsoringExtension(),
-        },
-      },
+          }
+        : {}),
       ...(STELLAR_PAYEE_ADDRESS
         ? {
             "GET /protected-stellar": {
@@ -353,13 +365,15 @@ app.get("/protected-aptos", (req, res) => {
  * that do NOT implement EIP-2612. The facilitator broadcasts the pre-signed
  * approve() transaction on the client's behalf before settling.
  */
-app.get("/protected-permit2-erc20", (req, res) => {
-  res.json({
-    message: "Permit2 ERC-20 approval endpoint accessed successfully",
-    timestamp: new Date().toISOString(),
-    method: "permit2-erc20-approval",
+if (EVM_FACILITATOR_ADDRESS) {
+  app.get("/protected-permit2-erc20", (req, res) => {
+    res.json({
+      message: "Permit2 ERC-20 approval endpoint accessed successfully",
+      timestamp: new Date().toISOString(),
+      method: "permit2-erc20-approval",
+    });
   });
-});
+}
 
 /**
  * Protected Permit2 endpoint - requires payment via Permit2 flow
@@ -367,13 +381,15 @@ app.get("/protected-permit2-erc20", (req, res) => {
  * This endpoint demonstrates the Permit2 payment flow.
  * Clients must have approved Permit2 to spend their USDC before accessing.
  */
-app.get("/protected-permit2", (req, res) => {
-  res.json({
-    message: "Permit2 endpoint accessed successfully",
-    timestamp: new Date().toISOString(),
-    method: "permit2",
+if (EVM_FACILITATOR_ADDRESS) {
+  app.get("/protected-permit2", (req, res) => {
+    res.json({
+      message: "Permit2 endpoint accessed successfully",
+      timestamp: new Date().toISOString(),
+      method: "permit2",
+    });
   });
-});
+}
 
 /**
  * Protected Stellar endpoint - requires payment to access
@@ -420,6 +436,12 @@ app.post("/close", (req, res) => {
   }, 100);
 });
 
+const permit2Endpoints = EVM_FACILITATOR_ADDRESS
+  ? "\n" +
+    "║  • GET  /protected-permit2     (Permit2 payment - EVM)     ║\n" +
+    "║  • GET  /protected-permit2-erc20 (Permit2 + ERC-20 approval) ║"
+  : "";
+
 // Start the server
 app.listen(parseInt(PORT), () => {
   console.log(`
@@ -439,9 +461,7 @@ app.listen(parseInt(PORT), () => {
 ║  Endpoints:                                            ║
 ║  • GET  /protected             (EIP-3009 payment - EVM)    ║
 ║  • GET  /protected-svm         (SVM payment)               ║
-║  • GET  /protected-aptos       (Aptos payment)             ║
-║  • GET  /protected-permit2     (Permit2 payment - EVM)     ║
-║  • GET  /protected-permit2-erc20 (Permit2 + ERC-20 approval) ║
+║  • GET  /protected-aptos       (Aptos payment)             ║${permit2Endpoints}
 ║  • GET  /protected-stellar     (Stellar payment)           ║
 ║  • GET  /health                (no payment required)       ║
 ║  • POST /close                 (shutdown server)           ║
diff --git a/e2e/servers/fastapi/main.py b/e2e/servers/fastapi/main.py
index 71ab554b..fadbf177 100644
--- a/e2e/servers/fastapi/main.py
+++ b/e2e/servers/fastapi/main.py
@@ -17,18 +17,25 @@
     register_exact_evm_server,
 )
 from bankofai.x402.mechanisms.svm.exact import register_exact_svm_server
+from bankofai.x402.mechanisms.tron.exact import register_exact_tron_server
 from bankofai.x402.extensions.bazaar import (
     bazaar_resource_server_extension,
     declare_discovery_extension,
     OutputConfig,
 )
+from bankofai.x402.extensions.trc20_approval_gas_sponsoring import (
+    declare_trc20_approval_gas_sponsoring_extension,
+)
 
 # Load environment variables
 load_dotenv()
 
 # Get configuration from environment
 EVM_ADDRESS = os.getenv("EVM_PAYEE_ADDRESS")
+EVM_FACILITATOR_ADDRESS = os.getenv("EVM_FACILITATOR_ADDRESS")
 SVM_ADDRESS = os.getenv("SVM_PAYEE_ADDRESS")
+TRON_ADDRESS = os.getenv("TRON_PAYEE_ADDRESS")
+TRON_FACILITATOR_ADDRESS = os.getenv("TRON_FACILITATOR_ADDRESS")
 PORT = int(os.getenv("PORT", "4021"))
 FACILITATOR_URL = os.getenv("FACILITATOR_URL")
 
@@ -38,17 +45,24 @@
 
 if not SVM_ADDRESS:
     print("Warning: SVM_PAYEE_ADDRESS not set - SVM payment endpoints disabled")
+if not TRON_ADDRESS:
+    print("Warning: TRON_PAYEE_ADDRESS not set - TRON payment endpoints disabled")
+if not TRON_FACILITATOR_ADDRESS:
+    print("Warning: TRON_FACILITATOR_ADDRESS not set - TRON Permit2 endpoints disabled")
+if not EVM_FACILITATOR_ADDRESS:
+    print("Warning: EVM_FACILITATOR_ADDRESS not set - EVM Permit2 endpoints disabled")
 
 # Network configurations (CAIP-2 format)
 EVM_NETWORK = "eip155:97"  # BSC Testnet
 SVM_NETWORK = "solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1"  # Solana Devnet
+TRON_NETWORK = os.getenv("TRON_NETWORK") or "tron:nile"
 
 app = FastAPI()
 
 # Create HTTP facilitator client
 if FACILITATOR_URL:
     print(f"Using remote facilitator at: {FACILITATOR_URL}")
-    config = FacilitatorConfig(url=FACILITATOR_URL)
+    config = FacilitatorConfig(url=FACILITATOR_URL, timeout=90.0)
     facilitator = HTTPFacilitatorClient(config)
 else:
     print("Using default facilitator")
@@ -74,6 +88,8 @@
 register_exact_evm_server(server, EVM_NETWORK)
 if SVM_ADDRESS:
     register_exact_svm_server(server, SVM_NETWORK)
+if TRON_ADDRESS:
+    register_exact_tron_server(server, TRON_NETWORK)
 
 # Register Bazaar discovery extension
 server.register_extension(bazaar_resource_server_extension)
@@ -140,6 +156,47 @@
             ),
         },
     },
+    **(
+        {
+            "GET /protected-permit2": {
+                "accepts": {
+                    "scheme": "exact",
+                    "payTo": EVM_ADDRESS,
+                    "assets": ["DHLU"],
+                    "price": {
+                        "amount": "1000",
+                        "asset": "0x375cADdd2cB68cE82e3D9B075D551067a7b4B816",
+                        "extra": {
+                            "name": "DA HULU",
+                            "version": "1",
+                            "assetTransferMethod": "permit2",
+                            "permit2FacilitatorAddress": EVM_FACILITATOR_ADDRESS,
+                        },
+                    },
+                    "network": EVM_NETWORK,
+                },
+                "extensions": {
+                    **declare_discovery_extension(
+                        output=OutputConfig(
+                            example={
+                                "message": "Access granted to Permit2 protected resource",
+                                "timestamp": "2024-01-01T00:00:00Z",
+                            },
+                            schema={
+                                "properties": {
+                                    "message": {"type": "string"},
+                                    "timestamp": {"type": "string"},
+                                },
+                                "required": ["message", "timestamp"],
+                            },
+                        )
+                    ),
+                },
+            },
+        }
+        if EVM_FACILITATOR_ADDRESS
+        else {}
+    ),
     **(
         {
             "GET /protected-svm": {
@@ -171,6 +228,82 @@
         if SVM_ADDRESS
         else {}
     ),
+    **(
+        {
+            "GET /protected-tron": {
+                "accepts": {
+                    "scheme": "exact",
+                    "payTo": TRON_ADDRESS,
+                    "price": "$0.01",
+                    "network": TRON_NETWORK,
+                    "extra": {
+                        "assetTransferMethod": "permit2",
+                        "permit2FacilitatorAddress": TRON_FACILITATOR_ADDRESS,
+                    },
+                },
+                "extensions": {
+                    **declare_discovery_extension(
+                        output=OutputConfig(
+                            example={
+                                "message": "Access granted to TRON protected resource",
+                                "timestamp": "2024-01-01T00:00:00Z",
+                            },
+                            schema={
+                                "properties": {
+                                    "message": {"type": "string"},
+                                    "timestamp": {"type": "string"},
+                                },
+                                "required": ["message", "timestamp"],
+                            },
+                        )
+                    ),
+                    **declare_trc20_approval_gas_sponsoring_extension(
+                        description="TRC-20 approval gas sponsoring (Permit2)",
+                    ),
+                },
+            },
+        }
+        if TRON_ADDRESS and TRON_FACILITATOR_ADDRESS
+        else {}
+    ),
+    **(
+        {
+            "GET /protected-tron-permit2": {
+                "accepts": {
+                    "scheme": "exact",
+                    "payTo": TRON_ADDRESS,
+                    "price": "$0.01",
+                    "network": TRON_NETWORK,
+                    "extra": {
+                        "assetTransferMethod": "permit2",
+                        "permit2FacilitatorAddress": TRON_FACILITATOR_ADDRESS,
+                    },
+                },
+                "extensions": {
+                    **declare_discovery_extension(
+                        output=OutputConfig(
+                            example={
+                                "message": "Access granted to TRON Permit2 resource",
+                                "timestamp": "2024-01-01T00:00:00Z",
+                            },
+                            schema={
+                                "properties": {
+                                    "message": {"type": "string"},
+                                    "timestamp": {"type": "string"},
+                                },
+                                "required": ["message", "timestamp"],
+                            },
+                        )
+                    ),
+                    **declare_trc20_approval_gas_sponsoring_extension(
+                        description="TRC-20 approval gas sponsoring (Permit2)",
+                    ),
+                },
+            },
+        }
+        if TRON_ADDRESS and TRON_FACILITATOR_ADDRESS
+        else {}
+    ),
 }
 
 
@@ -208,6 +341,18 @@ async def protected_endpoint_2() -> Dict[str, Any]:
     }
 
 
+@app.get("/protected-permit2")
+async def protected_permit2_endpoint() -> Dict[str, Any]:
+    """Protected endpoint that requires Permit2 payment."""
+    if shutdown_requested:
+        raise HTTPException(status_code=503, detail="Server shutting down")
+
+    return {
+        "message": "Access granted to Permit2 protected resource",
+        "timestamp": "2024-01-01T00:00:00Z",
+    }
+
+
 @app.get("/protected-svm")
 async def protected_svm_endpoint() -> Dict[str, Any]:
     """Protected endpoint that requires SVM (Solana) payment."""
@@ -220,6 +365,30 @@ async def protected_svm_endpoint() -> Dict[str, Any]:
     }
 
 
+@app.get("/protected-tron")
+async def protected_tron_endpoint() -> Dict[str, Any]:
+    """Protected endpoint that requires TRON payment."""
+    if shutdown_requested:
+        raise HTTPException(status_code=503, detail="Server shutting down")
+
+    return {
+        "message": "Access granted to TRON protected resource",
+        "timestamp": "2024-01-01T00:00:00Z",
+    }
+
+
+@app.get("/protected-tron-permit2")
+async def protected_tron_permit2_endpoint() -> Dict[str, Any]:
+    """Protected endpoint that requires TRON Permit2 payment."""
+    if shutdown_requested:
+        raise HTTPException(status_code=503, detail="Server shutting down")
+
+    return {
+        "message": "Access granted to TRON Permit2 resource",
+        "timestamp": "2024-01-01T00:00:00Z",
+    }
+
+
 @app.get("/health")
 async def health_check() -> Dict[str, Any]:
     """Health check endpoint."""
diff --git a/e2e/servers/fastapi/test.config.json b/e2e/servers/fastapi/test.config.json
index 91d3041f..4c2503dd 100644
--- a/e2e/servers/fastapi/test.config.json
+++ b/e2e/servers/fastapi/test.config.json
@@ -24,6 +24,14 @@
       "protocolFamily": "evm",
       "transferMethod": "eip3009"
     },
+    {
+      "path": "/protected-permit2",
+      "method": "GET",
+      "description": "Protected endpoint requiring Permit2 payment",
+      "requiresPayment": true,
+      "protocolFamily": "evm",
+      "transferMethod": "permit2"
+    },
     {
       "path": "/protected-svm",
       "method": "GET",
@@ -31,6 +39,22 @@
       "requiresPayment": true,
       "protocolFamily": "svm"
     },
+    {
+      "path": "/protected-tron",
+      "method": "GET",
+      "description": "Protected endpoint requiring TRON payment",
+      "requiresPayment": true,
+      "protocolFamily": "tron",
+      "transferMethod": "transferWithAuthorization"
+    },
+    {
+      "path": "/protected-tron-permit2",
+      "method": "GET",
+      "description": "Protected endpoint requiring TRON Permit2 payment",
+      "requiresPayment": true,
+      "protocolFamily": "tron",
+      "transferMethod": "permit2"
+    },
     {
       "path": "/health",
       "method": "GET",
@@ -50,8 +74,9 @@
     ],
     "optional": [
       "SVM_PAYEE_ADDRESS",
+      "TRON_PAYEE_ADDRESS",
       "PORT",
       "FACILITATOR_URL"
     ]
   }
-}
\ No newline at end of file
+}
diff --git a/e2e/servers/fastapi/uv.lock b/e2e/servers/fastapi/uv.lock
index df17c353..0d350cd2 100644
--- a/e2e/servers/fastapi/uv.lock
+++ b/e2e/servers/fastapi/uv.lock
@@ -225,10 +225,11 @@ svm = [
 
 [package.metadata]
 requires-dist = [
-    { name = "bankofai-x402", extras = ["evm", "svm"], marker = "extra == 'mechanisms'" },
     { name = "bankofai-x402", extras = ["flask", "fastapi"], marker = "extra == 'servers'" },
     { name = "bankofai-x402", extras = ["httpx", "requests"], marker = "extra == 'clients'" },
-    { name = "bankofai-x402", extras = ["httpx", "requests", "flask", "fastapi", "evm", "svm", "mcp", "extensions"], marker = "extra == 'all'" },
+    { name = "bankofai-x402", extras = ["httpx", "requests", "flask", "fastapi", "tron", "evm", "svm", "mcp", "extensions"], marker = "extra == 'all'" },
+    { name = "bankofai-x402", extras = ["tron", "evm", "svm"], marker = "extra == 'mechanisms'" },
+    { name = "base58", marker = "extra == 'tron'", specifier = ">=2.1.1" },
     { name = "eth-abi", marker = "extra == 'evm'", specifier = ">=5.0.0" },
     { name = "eth-account", marker = "extra == 'evm'", specifier = ">=0.12.0" },
     { name = "eth-keys", marker = "extra == 'evm'", specifier = ">=0.5.0" },
@@ -244,6 +245,7 @@ requires-dist = [
     { name = "solana", marker = "extra == 'svm'", specifier = ">=0.36.0" },
     { name = "solders", marker = "extra == 'svm'", specifier = ">=0.27.0" },
     { name = "starlette", marker = "extra == 'fastapi'", specifier = ">=0.27.0" },
+    { name = "tronpy", marker = "extra == 'tron'", specifier = ">=0.6.0,<0.7.0" },
     { name = "typing-extensions", specifier = ">=4.0.0" },
     { name = "web3", marker = "extra == 'evm'", specifier = ">=7.0.0" },
 ]
diff --git a/e2e/servers/flask/uv.lock b/e2e/servers/flask/uv.lock
index e100787c..6657cb69 100644
--- a/e2e/servers/flask/uv.lock
+++ b/e2e/servers/flask/uv.lock
@@ -215,10 +215,11 @@ svm = [
 
 [package.metadata]
 requires-dist = [
-    { name = "bankofai-x402", extras = ["evm", "svm"], marker = "extra == 'mechanisms'" },
     { name = "bankofai-x402", extras = ["flask", "fastapi"], marker = "extra == 'servers'" },
     { name = "bankofai-x402", extras = ["httpx", "requests"], marker = "extra == 'clients'" },
-    { name = "bankofai-x402", extras = ["httpx", "requests", "flask", "fastapi", "evm", "svm", "mcp", "extensions"], marker = "extra == 'all'" },
+    { name = "bankofai-x402", extras = ["httpx", "requests", "flask", "fastapi", "tron", "evm", "svm", "mcp", "extensions"], marker = "extra == 'all'" },
+    { name = "bankofai-x402", extras = ["tron", "evm", "svm"], marker = "extra == 'mechanisms'" },
+    { name = "base58", marker = "extra == 'tron'", specifier = ">=2.1.1" },
     { name = "eth-abi", marker = "extra == 'evm'", specifier = ">=5.0.0" },
     { name = "eth-account", marker = "extra == 'evm'", specifier = ">=0.12.0" },
     { name = "eth-keys", marker = "extra == 'evm'", specifier = ">=0.5.0" },
@@ -234,6 +235,7 @@ requires-dist = [
     { name = "solana", marker = "extra == 'svm'", specifier = ">=0.36.0" },
     { name = "solders", marker = "extra == 'svm'", specifier = ">=0.27.0" },
     { name = "starlette", marker = "extra == 'fastapi'", specifier = ">=0.27.0" },
+    { name = "tronpy", marker = "extra == 'tron'", specifier = ">=0.6.0,<0.7.0" },
     { name = "typing-extensions", specifier = ">=4.0.0" },
     { name = "web3", marker = "extra == 'evm'", specifier = ">=7.0.0" },
 ]
diff --git a/e2e/servers/mcp-python/uv.lock b/e2e/servers/mcp-python/uv.lock
index 6d6916ec..4582ea6c 100644
--- a/e2e/servers/mcp-python/uv.lock
+++ b/e2e/servers/mcp-python/uv.lock
@@ -208,10 +208,11 @@ mcp = [
 
 [package.metadata]
 requires-dist = [
-    { name = "bankofai-x402", extras = ["evm", "svm"], marker = "extra == 'mechanisms'" },
     { name = "bankofai-x402", extras = ["flask", "fastapi"], marker = "extra == 'servers'" },
     { name = "bankofai-x402", extras = ["httpx", "requests"], marker = "extra == 'clients'" },
-    { name = "bankofai-x402", extras = ["httpx", "requests", "flask", "fastapi", "evm", "svm", "mcp", "extensions"], marker = "extra == 'all'" },
+    { name = "bankofai-x402", extras = ["httpx", "requests", "flask", "fastapi", "tron", "evm", "svm", "mcp", "extensions"], marker = "extra == 'all'" },
+    { name = "bankofai-x402", extras = ["tron", "evm", "svm"], marker = "extra == 'mechanisms'" },
+    { name = "base58", marker = "extra == 'tron'", specifier = ">=2.1.1" },
     { name = "eth-abi", marker = "extra == 'evm'", specifier = ">=5.0.0" },
     { name = "eth-account", marker = "extra == 'evm'", specifier = ">=0.12.0" },
     { name = "eth-keys", marker = "extra == 'evm'", specifier = ">=0.5.0" },
@@ -227,6 +228,7 @@ requires-dist = [
     { name = "solana", marker = "extra == 'svm'", specifier = ">=0.36.0" },
     { name = "solders", marker = "extra == 'svm'", specifier = ">=0.27.0" },
     { name = "starlette", marker = "extra == 'fastapi'", specifier = ">=0.27.0" },
+    { name = "tronpy", marker = "extra == 'tron'", specifier = ">=0.6.0,<0.7.0" },
     { name = "typing-extensions", specifier = ">=4.0.0" },
     { name = "web3", marker = "extra == 'evm'", specifier = ">=7.0.0" },
 ]
diff --git a/e2e/src/clients/generic-client.ts b/e2e/src/clients/generic-client.ts
index 3485f0fc..4f69fdd7 100644
--- a/e2e/src/clients/generic-client.ts
+++ b/e2e/src/clients/generic-client.ts
@@ -24,7 +24,9 @@ export class GenericClientProxy extends BaseProxy implements ClientProxy {
           SVM_PRIVATE_KEY: config.svmPrivateKey,
           APTOS_PRIVATE_KEY: config.aptosPrivateKey,
           STELLAR_PRIVATE_KEY: config.stellarPrivateKey,
+          TRON_PRIVATE_KEY: config.tronPrivateKey,
           EVM_RPC_URL: config.evmRpcUrl || '',
+          TRON_RPC_URL: config.tronRpcUrl || '',
           RESOURCE_SERVER_URL: config.serverUrl,
           ENDPOINT_PATH: config.endpointPath,
         }
@@ -70,4 +72,4 @@ export class GenericClientProxy extends BaseProxy implements ClientProxy {
   async forceStop(): Promise<void> {
     await this.stopProcess();
   }
-} 
\ No newline at end of file
+} 
diff --git a/e2e/src/discovery.ts b/e2e/src/discovery.ts
index 2950367b..ce4532dd 100644
--- a/e2e/src/discovery.ts
+++ b/e2e/src/discovery.ts
@@ -293,8 +293,8 @@ export class TestDiscovery {
 
           // For protocols with transfer methods (EVM, TRON), check compatibility with client
           if (endpointProtocolFamily === 'evm' || endpointProtocolFamily === 'tron') {
-            const defaultMethod = endpointProtocolFamily === 'evm' ? 'eip3009' : 'tip712';
-            const endpointTransferMethod = endpoint.transferMethod || defaultMethod;
+            const defaultMethod = endpointProtocolFamily === 'evm' ? 'eip3009' : 'transferWithAuthorization';
+            const endpointTransferMethod = (endpoint as any).permit2 ? 'permit2' : (endpoint.transferMethod || defaultMethod);
             const clientTransferMethods = (endpointProtocolFamily === 'evm'
               ? client.config.evm?.transferMethods
               : client.config.tron?.transferMethods) || [defaultMethod];
@@ -310,8 +310,8 @@ export class TestDiscovery {
             const supportsVersion = f.config.x402Versions?.includes(serverVersion);
             // For protocols with transfer methods, also check compatibility
             if (endpointProtocolFamily === 'evm' || endpointProtocolFamily === 'tron') {
-              const defaultMethod = endpointProtocolFamily === 'evm' ? 'eip3009' : 'tip712';
-              const endpointTransferMethod = endpoint.transferMethod || defaultMethod;
+              const defaultMethod = endpointProtocolFamily === 'evm' ? 'eip3009' : 'transferWithAuthorization';
+              const endpointTransferMethod = (endpoint as any).permit2 ? 'permit2' : (endpoint.transferMethod || defaultMethod);
               const facilTransferMethods = (endpointProtocolFamily === 'evm'
                 ? f.config.evm?.transferMethods
                 : f.config.tron?.transferMethods) || [defaultMethod];
@@ -321,12 +321,6 @@ export class TestDiscovery {
           });
 
           for (const facilitator of matchingFacilitators) {
-            // TODO: Python SDK currently lacks Permit2 support.
-            // We skip these scenarios when using the python facilitator to avoid expected failures.
-            if (facilitator.name === 'python' && (endpoint.transferMethod === 'permit2' || (endpoint as any).permit2)) {
-              continue;
-            }
-
             scenarios.push({
               client,
               server,
diff --git a/e2e/src/facilitators/facilitator-manager.ts b/e2e/src/facilitators/facilitator-manager.ts
index e54be2da..12e1fc29 100644
--- a/e2e/src/facilitators/facilitator-manager.ts
+++ b/e2e/src/facilitators/facilitator-manager.ts
@@ -37,6 +37,7 @@ export class FacilitatorManager {
       svmPrivateKey: process.env.FACILITATOR_SVM_PRIVATE_KEY,
       aptosPrivateKey: process.env.FACILITATOR_APTOS_PRIVATE_KEY,
       stellarPrivateKey: process.env.FACILITATOR_STELLAR_PRIVATE_KEY,
+      tronPrivateKey: process.env.FACILITATOR_TRON_PRIVATE_KEY,
       networks,
     });
 
diff --git a/e2e/src/facilitators/generic-facilitator.ts b/e2e/src/facilitators/generic-facilitator.ts
index 672f758a..5191da1a 100644
--- a/e2e/src/facilitators/generic-facilitator.ts
+++ b/e2e/src/facilitators/generic-facilitator.ts
@@ -55,6 +55,7 @@ export interface FacilitatorConfig {
   svmPrivateKey?: string;
   aptosPrivateKey?: string;
   stellarPrivateKey?: string;
+  tronPrivateKey?: string;
   networks: NetworkSet;
 }
 
@@ -116,6 +117,7 @@ export class GenericFacilitatorProxy extends BaseProxy implements FacilitatorPro
       SVM_PRIVATE_KEY: config.svmPrivateKey || '',
       APTOS_PRIVATE_KEY: config.aptosPrivateKey || '',
       STELLAR_PRIVATE_KEY: config.stellarPrivateKey || '',
+      TRON_PRIVATE_KEY: config.tronPrivateKey || '',
 
       // Network configs from NetworkSet
       EVM_NETWORK: config.networks.evm.caip2,
@@ -126,6 +128,8 @@ export class GenericFacilitatorProxy extends BaseProxy implements FacilitatorPro
       APTOS_RPC_URL: config.networks.aptos.rpcUrl,
       STELLAR_NETWORK: config.networks.stellar.caip2,
       STELLAR_RPC_URL: config.networks.stellar.rpcUrl,
+      TRON_NETWORK: config.networks.tron?.caip2 || '',
+      TRON_RPC_URL: config.networks.tron?.rpcUrl || '',
     };
 
     // Pass through any additional environment variables required by the facilitator
@@ -339,6 +343,6 @@ export class GenericFacilitatorProxy extends BaseProxy implements FacilitatorPro
   }
 
   getUrl(): string {
-    return `http://localhost:${this.port}`;
+    return `http://127.0.0.1:${this.port}`;
   }
 }
diff --git a/e2e/src/sampling.ts b/e2e/src/sampling.ts
index b493975a..e30ae811 100644
--- a/e2e/src/sampling.ts
+++ b/e2e/src/sampling.ts
@@ -37,7 +37,7 @@ export class CoverageTracker {
    * including different EVM transfer methods (eip3009 vs permit2).
    */
   private getEndpointCoverageKey(serverName: string, endpointPath: string, protocolFamily: string, version: number, transferMethod?: string): string {
-    const defaultMethods: Record<string, string> = { evm: 'eip3009', tron: 'tip712' };
+    const defaultMethods: Record<string, string> = { evm: 'eip3009', tron: 'transferWithAuthorization' };
     const method = defaultMethods[protocolFamily] ? (transferMethod || defaultMethods[protocolFamily]) : '';
     return `${serverName}-${endpointPath}-${protocolFamily}${method ? `-${method}` : ''}-v${version}`;
   }
@@ -195,4 +195,3 @@ export function minimizeScenarios(scenarios: TestScenario[]): TestScenario[] {
 
   return minimized;
 }
-
diff --git a/e2e/src/servers/generic-server.ts b/e2e/src/servers/generic-server.ts
index 9d06672f..c69690cb 100644
--- a/e2e/src/servers/generic-server.ts
+++ b/e2e/src/servers/generic-server.ts
@@ -108,6 +108,11 @@ export class GenericServerProxy extends BaseProxy implements ServerProxy {
         STELLAR_RPC_URL: config.networks.stellar.rpcUrl,
         STELLAR_PAYEE_ADDRESS: config.stellarPayTo,
 
+        // TRON network config
+        TRON_NETWORK: config.networks.tron?.caip2 || '',
+        TRON_RPC_URL: config.networks.tron?.rpcUrl || '',
+        TRON_PAYEE_ADDRESS: config.tronPayTo,
+
         // Facilitator
         FACILITATOR_URL: config.facilitatorUrl || '',
       }
diff --git a/e2e/src/types.ts b/e2e/src/types.ts
index a12e2802..49da4513 100644
--- a/e2e/src/types.ts
+++ b/e2e/src/types.ts
@@ -2,7 +2,7 @@ import type { NetworkSet } from './networks/networks';
 
 export type ProtocolFamily = 'evm' | 'svm' | 'aptos' | 'stellar' | 'tron';
 export type Transport = 'http' | 'mcp';
-export type TransferMethod = 'eip3009' | 'permit2' | 'tip712';
+export type TransferMethod = 'eip3009' | 'permit2' | 'transferWithAuthorization';
 
 export interface ClientResult {
   success: boolean;
@@ -18,6 +18,7 @@ export interface ClientConfig {
   aptosPrivateKey: string;
   stellarPrivateKey: string;
   evmRpcUrl?: string;
+  tronRpcUrl?: string;
   tronPrivateKey: string;
   serverUrl: string;
   endpointPath: string;
diff --git a/e2e/test.ts b/e2e/test.ts
index 53c96a25..de99b3b3 100644
--- a/e2e/test.ts
+++ b/e2e/test.ts
@@ -129,12 +129,28 @@ async function runClientTest(
 ): Promise<ScenarioResult & { verboseLogs?: string[] }> {
   const verboseLogs: string[] = [];
 
+  const sanitizeForLogs = (value: unknown): unknown => {
+    if (Array.isArray(value)) {
+      return value.map(sanitizeForLogs);
+    }
+    if (value && typeof value === "object") {
+      const entries = Object.entries(value as Record<string, unknown>).map(([k, v]) => {
+        if (k.toLowerCase().includes("privatekey")) {
+          return [k, "<redacted>"] as const;
+        }
+        return [k, sanitizeForLogs(v)] as const;
+      });
+      return Object.fromEntries(entries);
+    }
+    return value;
+  };
+
   const bufferLog = (msg: string) => {
     verboseLogs.push(msg);
   };
 
   try {
-    bufferLog(`  📞 Running client: ${JSON.stringify(callConfig, null, 2)}`);
+    bufferLog(`  📞 Running client: ${JSON.stringify(sanitizeForLogs(callConfig), null, 2)}`);
     const result = await client.call(callConfig);
     bufferLog(`  📊 Client result: ${JSON.stringify(result, null, 2)}`);
 
@@ -238,14 +254,18 @@ async function runTest() {
   const serverSvmAddress = process.env.SERVER_SVM_ADDRESS;
   const serverAptosAddress = process.env.SERVER_APTOS_ADDRESS;
   const serverStellarAddress = process.env.SERVER_STELLAR_ADDRESS;
+  const serverTronAddress = process.env.SERVER_TRON_ADDRESS;
+  const tronFacilitatorAddress = process.env.TRON_FACILITATOR_ADDRESS;
   const clientEvmPrivateKey = process.env.CLIENT_EVM_PRIVATE_KEY;
   const clientSvmPrivateKey = process.env.CLIENT_SVM_PRIVATE_KEY;
   const clientAptosPrivateKey = process.env.CLIENT_APTOS_PRIVATE_KEY;
   const clientStellarPrivateKey = process.env.CLIENT_STELLAR_PRIVATE_KEY;
+  const clientTronPrivateKey = process.env.CLIENT_TRON_PRIVATE_KEY;
   const facilitatorEvmPrivateKey = process.env.FACILITATOR_EVM_PRIVATE_KEY;
   const facilitatorSvmPrivateKey = process.env.FACILITATOR_SVM_PRIVATE_KEY;
   const facilitatorAptosPrivateKey = process.env.FACILITATOR_APTOS_PRIVATE_KEY;
   const facilitatorStellarPrivateKey = process.env.FACILITATOR_STELLAR_PRIVATE_KEY;
+  const facilitatorTronPrivateKey = process.env.FACILITATOR_TRON_PRIVATE_KEY;
   // Env validation is deferred until after scenario filtering so we only
   // require variables for the protocol families that will actually be tested.
 
@@ -320,6 +340,9 @@ async function runTest() {
   log(`   SVM: ${networks.svm.name} (${networks.svm.caip2})`);
   log(`   APTOS: ${networks.aptos.name} (${networks.aptos.caip2})`);
   log(`   STELLAR: ${networks.stellar.name} (${networks.stellar.caip2})`);
+  if (networks.tron) {
+    log(`   TRON: ${networks.tron.name} (${networks.tron.caip2})`);
+  }
 
   if (networkMode === 'mainnet') {
     log('\n⚠️  WARNING: Running on MAINNET - real funds will be used!');
@@ -377,6 +400,12 @@ async function runTest() {
     if (!clientStellarPrivateKey) missingEnv.push('CLIENT_STELLAR_PRIVATE_KEY');
     if (!facilitatorStellarPrivateKey) missingEnv.push('FACILITATOR_STELLAR_PRIVATE_KEY');
   }
+  if (requiredFamilies.has('tron')) {
+    if (!serverTronAddress) missingEnv.push('SERVER_TRON_ADDRESS');
+    if (!tronFacilitatorAddress) missingEnv.push('TRON_FACILITATOR_ADDRESS');
+    if (!clientTronPrivateKey) missingEnv.push('CLIENT_TRON_PRIVATE_KEY');
+    if (!facilitatorTronPrivateKey) missingEnv.push('FACILITATOR_TRON_PRIVATE_KEY');
+  }
 
   if (missingEnv.length > 0) {
     errorLog('❌ Missing required environment variables for selected protocol families:');
@@ -387,7 +416,7 @@ async function runTest() {
 
   // Auto-detect Permit2 scenarios
   const hasPermit2Scenarios = filteredScenarios.some(
-    (s) => s.endpoint.transferMethod === 'permit2'
+    (s) => s.endpoint.transferMethod === 'permit2' || (s.endpoint as any).permit2
   );
 
   // Check if eip2612GasSponsoring extension should be tested
@@ -599,6 +628,8 @@ async function runTest() {
       aptosPrivateKey: clientAptosPrivateKey || '',
       stellarPrivateKey: clientStellarPrivateKey || '',
       evmRpcUrl: networks.evm.rpcUrl,
+      tronPrivateKey: clientTronPrivateKey || '',
+      tronRpcUrl: networks.tron?.rpcUrl || '',
       serverUrl: `http://localhost:${port}`,
       endpointPath: scenario.endpoint.path,
     };
@@ -679,6 +710,7 @@ async function runTest() {
     const facilitatorConfig = facilitatorName ? uniqueFacilitators.get(facilitatorName)?.config : undefined;
     const facilitatorSupportsAptos = facilitatorConfig?.protocolFamilies?.includes('aptos') ?? false;
     const facilitatorSupportsStellar = facilitatorConfig?.protocolFamilies?.includes('stellar') ?? false;
+    const facilitatorSupportsTron = facilitatorConfig?.protocolFamilies?.includes('tron') ?? false;
 
     const serverConfig: ServerConfig = {
       port,
@@ -686,6 +718,7 @@ async function runTest() {
       svmPayTo: serverSvmAddress!,
       aptosPayTo: facilitatorSupportsAptos ? (serverAptosAddress || '') : '',
       stellarPayTo: facilitatorSupportsStellar ? (serverStellarAddress || '') : '',
+      tronPayTo: facilitatorSupportsTron ? (serverTronAddress || '') : '',
       networks,
       facilitatorUrl,
     };
diff --git a/python/x402/pyproject.toml b/python/x402/pyproject.toml
index 4168f0eb..c75917e7 100644
--- a/python/x402/pyproject.toml
+++ b/python/x402/pyproject.toml
@@ -37,7 +37,7 @@ fastapi = ["fastapi[standard]>=0.115.0", "starlette>=0.27.0"]
 # Blockchain mechanisms - install based on which chains you need
 tron = [
     "base58>=2.1.1",
-    "tronpy>=0.4.0",
+    "tronpy>=0.6.0,<0.7.0",
 ]
 evm = [
     "eth-abi>=5.0.0",
diff --git a/python/x402/src/bankofai/x402/client_base.py b/python/x402/src/bankofai/x402/client_base.py
index 4bc6ed7c..6da8245b 100644
--- a/python/x402/src/bankofai/x402/client_base.py
+++ b/python/x402/src/bankofai/x402/client_base.py
@@ -5,13 +5,14 @@
 
 from __future__ import annotations
 
+import inspect
 from collections.abc import Awaitable, Callable, Generator
 from dataclasses import dataclass, field
 from typing import Any, Literal
 
 from typing_extensions import Self
 
-from .interfaces import SchemeNetworkClient, SchemeNetworkClientV1
+from .interfaces import PaymentPayloadContext, SchemeNetworkClient, SchemeNetworkClientV1
 from .schemas import (
     AbortResult,
     Network,
@@ -268,6 +269,37 @@ def get_registered_schemes(
     # Core Logic Generators (shared between async/sync)
     # ========================================================================
 
+    @staticmethod
+    def _supports_payload_context(create_payload: Callable[..., Any]) -> bool:
+        """Return whether create_payment_payload supports a context argument."""
+        try:
+            signature = inspect.signature(create_payload)
+        except (TypeError, ValueError):
+            return True
+
+        parameters = list(signature.parameters.values())
+        positional = [
+            p
+            for p in parameters
+            if p.kind
+            in (inspect.Parameter.POSITIONAL_ONLY, inspect.Parameter.POSITIONAL_OR_KEYWORD)
+        ]
+        if len(positional) >= 2:
+            return True
+        return any(p.kind == inspect.Parameter.VAR_POSITIONAL for p in parameters)
+
+    @classmethod
+    def _create_inner_payload(
+        cls,
+        create_payload: Callable[..., Any],
+        requirements: PaymentRequirements | PaymentRequirementsV1,
+        payload_context: PaymentPayloadContext,
+    ) -> Any:
+        """Call scheme payload factory with backward-compatible signature handling."""
+        if cls._supports_payload_context(create_payload):
+            return create_payload(requirements, payload_context)
+        return create_payload(requirements)
+
     def _create_payment_payload_v2_core(
         self,
         payment_required: PaymentRequired,
@@ -304,15 +336,32 @@ def _create_payment_payload_v2_core(
             client = schemes[selected.scheme]
 
             # 5. Create inner payload
-            inner_payload = client.create_payment_payload(selected)
+            payload_context = PaymentPayloadContext(extensions=payment_required.extensions)
+            inner_payload = self._create_inner_payload(
+                client.create_payment_payload,
+                selected,
+                payload_context,
+            )
+            client_extensions = None
+            if isinstance(inner_payload, tuple):
+                inner_payload, client_extensions = inner_payload
 
             # 6. Wrap into full PaymentPayload
+            merged_extensions: dict[str, Any] | None
+            base_extensions = extensions if extensions is not None else payment_required.extensions
+            if base_extensions is None:
+                base_extensions = {}
+            if client_extensions:
+                merged_extensions = {**base_extensions, **client_extensions}
+            else:
+                merged_extensions = base_extensions if base_extensions else None
+
             payload = PaymentPayload(
                 x402_version=2,
                 payload=inner_payload,
                 accepted=selected,
                 resource=resource or payment_required.resource,
-                extensions=extensions or payment_required.extensions,
+                extensions=merged_extensions,
             )
 
             # 7. Execute after hooks
@@ -374,7 +423,14 @@ def _create_payment_payload_v1_core(
             client = schemes[selected.scheme]
 
             # 5. Create inner payload
-            inner_payload = client.create_payment_payload(selected)
+            payload_context = PaymentPayloadContext(extensions=None)
+            inner_payload = self._create_inner_payload(
+                client.create_payment_payload,
+                selected,
+                payload_context,
+            )
+            if isinstance(inner_payload, tuple):
+                inner_payload = inner_payload[0]
 
             # 6. Wrap into full PaymentPayloadV1
             payload = PaymentPayloadV1(
diff --git a/python/x402/src/bankofai/x402/extensions/__init__.py b/python/x402/src/bankofai/x402/extensions/__init__.py
index ff74ea70..c7234bd9 100644
--- a/python/x402/src/bankofai/x402/extensions/__init__.py
+++ b/python/x402/src/bankofai/x402/extensions/__init__.py
@@ -36,6 +36,27 @@
 # Create alias for backward compatibility
 ValidationResult = BazaarValidationResult
 
+from .eip2612_gas_sponsoring import (  # noqa: E402
+    EIP2612_GAS_SPONSORING,
+    Eip2612GasSponsoringExtension,
+    Eip2612GasSponsoringInfo,
+    Eip2612GasSponsoringServerInfo,
+    declare_eip2612_gas_sponsoring_extension,
+    extract_eip2612_gas_sponsoring_info,
+    validate_eip2612_gas_sponsoring_info,
+)
+from .erc20_approval_gas_sponsoring import (  # noqa: E402
+    ERC20_APPROVAL_GAS_SPONSORING,
+    ERC20_APPROVAL_GAS_SPONSORING_VERSION,
+    Erc20ApprovalGasSponsoringExtension,
+    Erc20ApprovalGasSponsoringInfo,
+    Erc20ApprovalGasSponsoringServerInfo,
+    Erc20ApprovalGasSponsoringSigner,
+    create_erc20_approval_gas_sponsoring_extension,
+    declare_erc20_approval_gas_sponsoring_extension,
+    extract_erc20_approval_gas_sponsoring_info,
+    validate_erc20_approval_gas_sponsoring_info,
+)
 from .payment_identifier import (  # noqa: E402
     PAYMENT_ID_MAX_LENGTH,
     PAYMENT_ID_MIN_LENGTH,
@@ -59,6 +80,18 @@
     validate_payment_identifier,
     validate_payment_identifier_requirement,
 )
+from .trc20_approval_gas_sponsoring import (  # noqa: E402
+    TRC20_APPROVAL_GAS_SPONSORING,
+    TRC20_APPROVAL_GAS_SPONSORING_VERSION,
+    Trc20ApprovalGasSponsoringExtension,
+    Trc20ApprovalGasSponsoringInfo,
+    Trc20ApprovalGasSponsoringServerInfo,
+    Trc20ApprovalGasSponsoringSigner,
+    create_trc20_approval_gas_sponsoring_extension,
+    declare_trc20_approval_gas_sponsoring_extension,
+    extract_trc20_approval_gas_sponsoring_info,
+    validate_trc20_approval_gas_sponsoring_info,
+)
 
 __all__ = [
     # Constants
@@ -125,4 +158,34 @@
     "validate_payment_identifier_requirement",
     "PaymentIdentifierValidationResult",
     "BazaarValidationResult",
+    # EIP-2612 gas sponsoring
+    "EIP2612_GAS_SPONSORING",
+    "Eip2612GasSponsoringInfo",
+    "Eip2612GasSponsoringServerInfo",
+    "Eip2612GasSponsoringExtension",
+    "declare_eip2612_gas_sponsoring_extension",
+    "extract_eip2612_gas_sponsoring_info",
+    "validate_eip2612_gas_sponsoring_info",
+    # ERC-20 approval gas sponsoring
+    "ERC20_APPROVAL_GAS_SPONSORING",
+    "ERC20_APPROVAL_GAS_SPONSORING_VERSION",
+    "Erc20ApprovalGasSponsoringSigner",
+    "Erc20ApprovalGasSponsoringInfo",
+    "Erc20ApprovalGasSponsoringServerInfo",
+    "Erc20ApprovalGasSponsoringExtension",
+    "create_erc20_approval_gas_sponsoring_extension",
+    "declare_erc20_approval_gas_sponsoring_extension",
+    "extract_erc20_approval_gas_sponsoring_info",
+    "validate_erc20_approval_gas_sponsoring_info",
+    # TRC-20 approval gas sponsoring
+    "TRC20_APPROVAL_GAS_SPONSORING",
+    "TRC20_APPROVAL_GAS_SPONSORING_VERSION",
+    "Trc20ApprovalGasSponsoringSigner",
+    "Trc20ApprovalGasSponsoringInfo",
+    "Trc20ApprovalGasSponsoringServerInfo",
+    "Trc20ApprovalGasSponsoringExtension",
+    "create_trc20_approval_gas_sponsoring_extension",
+    "declare_trc20_approval_gas_sponsoring_extension",
+    "extract_trc20_approval_gas_sponsoring_info",
+    "validate_trc20_approval_gas_sponsoring_info",
 ]
diff --git a/python/x402/src/bankofai/x402/extensions/eip2612_gas_sponsoring/__init__.py b/python/x402/src/bankofai/x402/extensions/eip2612_gas_sponsoring/__init__.py
new file mode 100644
index 00000000..ed70f167
--- /dev/null
+++ b/python/x402/src/bankofai/x402/extensions/eip2612_gas_sponsoring/__init__.py
@@ -0,0 +1,23 @@
+"""EIP-2612 Gas Sponsoring Extension for x402 v2."""
+
+from .types import (
+    EIP2612_GAS_SPONSORING,
+    Eip2612GasSponsoringExtension,
+    Eip2612GasSponsoringInfo,
+    Eip2612GasSponsoringServerInfo,
+)
+from .utils import (
+    declare_eip2612_gas_sponsoring_extension,
+    extract_eip2612_gas_sponsoring_info,
+    validate_eip2612_gas_sponsoring_info,
+)
+
+__all__ = [
+    "EIP2612_GAS_SPONSORING",
+    "Eip2612GasSponsoringInfo",
+    "Eip2612GasSponsoringServerInfo",
+    "Eip2612GasSponsoringExtension",
+    "declare_eip2612_gas_sponsoring_extension",
+    "extract_eip2612_gas_sponsoring_info",
+    "validate_eip2612_gas_sponsoring_info",
+]
diff --git a/python/x402/src/bankofai/x402/extensions/eip2612_gas_sponsoring/types.py b/python/x402/src/bankofai/x402/extensions/eip2612_gas_sponsoring/types.py
new file mode 100644
index 00000000..969758a3
--- /dev/null
+++ b/python/x402/src/bankofai/x402/extensions/eip2612_gas_sponsoring/types.py
@@ -0,0 +1,45 @@
+"""Type definitions for the EIP-2612 Gas Sponsoring Extension."""
+
+from dataclasses import dataclass
+from typing import Any
+
+from ...interfaces import FacilitatorExtension
+
+EIP2612_GAS_SPONSORING = FacilitatorExtension(key="eip2612GasSponsoring")
+
+
+@dataclass
+class Eip2612GasSponsoringInfo:
+    from_address: str
+    asset: str
+    spender: str
+    amount: str
+    nonce: str
+    deadline: str
+    signature: str
+    version: str
+
+    @classmethod
+    def from_dict(cls, data: dict[str, Any]) -> "Eip2612GasSponsoringInfo":
+        return cls(
+            from_address=str(data.get("from", "")),
+            asset=str(data.get("asset", "")),
+            spender=str(data.get("spender", "")),
+            amount=str(data.get("amount", "")),
+            nonce=str(data.get("nonce", "")),
+            deadline=str(data.get("deadline", "")),
+            signature=str(data.get("signature", "")),
+            version=str(data.get("version", "")),
+        )
+
+
+@dataclass
+class Eip2612GasSponsoringServerInfo:
+    description: str
+    version: str
+
+
+@dataclass
+class Eip2612GasSponsoringExtension:
+    info: Eip2612GasSponsoringInfo | Eip2612GasSponsoringServerInfo
+    schema: dict[str, Any]
diff --git a/python/x402/src/bankofai/x402/extensions/eip2612_gas_sponsoring/utils.py b/python/x402/src/bankofai/x402/extensions/eip2612_gas_sponsoring/utils.py
new file mode 100644
index 00000000..5bfa932b
--- /dev/null
+++ b/python/x402/src/bankofai/x402/extensions/eip2612_gas_sponsoring/utils.py
@@ -0,0 +1,43 @@
+"""Utility helpers for the EIP-2612 Gas Sponsoring Extension."""
+
+from typing import Any
+
+from .types import EIP2612_GAS_SPONSORING, Eip2612GasSponsoringInfo
+
+
+def declare_eip2612_gas_sponsoring_extension(description: str = "EIP-2612 gas sponsoring") -> dict:
+    """Declare the EIP-2612 gas sponsoring extension in PaymentRequired."""
+    return {
+        EIP2612_GAS_SPONSORING.key: {
+            "info": {"description": description, "version": "1"},
+            "schema": {},
+        }
+    }
+
+
+def extract_eip2612_gas_sponsoring_info(
+    payment_payload_extensions: dict[str, Any] | None,
+) -> Eip2612GasSponsoringInfo | None:
+    if not payment_payload_extensions:
+        return None
+    raw = payment_payload_extensions.get(EIP2612_GAS_SPONSORING.key)
+    if not isinstance(raw, dict):
+        return None
+    info = raw.get("info")
+    if not isinstance(info, dict):
+        return None
+    return Eip2612GasSponsoringInfo.from_dict(info)
+
+
+def validate_eip2612_gas_sponsoring_info(info: Eip2612GasSponsoringInfo) -> bool:
+    required = [
+        info.from_address,
+        info.asset,
+        info.spender,
+        info.amount,
+        info.nonce,
+        info.deadline,
+        info.signature,
+        info.version,
+    ]
+    return all(bool(v) for v in required)
diff --git a/python/x402/src/bankofai/x402/extensions/erc20_approval_gas_sponsoring/__init__.py b/python/x402/src/bankofai/x402/extensions/erc20_approval_gas_sponsoring/__init__.py
new file mode 100644
index 00000000..96d68c1b
--- /dev/null
+++ b/python/x402/src/bankofai/x402/extensions/erc20_approval_gas_sponsoring/__init__.py
@@ -0,0 +1,29 @@
+"""ERC-20 Approval Gas Sponsoring Extension for x402 v2."""
+
+from .types import (
+    ERC20_APPROVAL_GAS_SPONSORING,
+    ERC20_APPROVAL_GAS_SPONSORING_VERSION,
+    Erc20ApprovalGasSponsoringExtension,
+    Erc20ApprovalGasSponsoringInfo,
+    Erc20ApprovalGasSponsoringServerInfo,
+    Erc20ApprovalGasSponsoringSigner,
+    create_erc20_approval_gas_sponsoring_extension,
+)
+from .utils import (
+    declare_erc20_approval_gas_sponsoring_extension,
+    extract_erc20_approval_gas_sponsoring_info,
+    validate_erc20_approval_gas_sponsoring_info,
+)
+
+__all__ = [
+    "ERC20_APPROVAL_GAS_SPONSORING",
+    "ERC20_APPROVAL_GAS_SPONSORING_VERSION",
+    "Erc20ApprovalGasSponsoringExtension",
+    "Erc20ApprovalGasSponsoringSigner",
+    "Erc20ApprovalGasSponsoringInfo",
+    "Erc20ApprovalGasSponsoringServerInfo",
+    "create_erc20_approval_gas_sponsoring_extension",
+    "declare_erc20_approval_gas_sponsoring_extension",
+    "extract_erc20_approval_gas_sponsoring_info",
+    "validate_erc20_approval_gas_sponsoring_info",
+]
diff --git a/python/x402/src/bankofai/x402/extensions/erc20_approval_gas_sponsoring/types.py b/python/x402/src/bankofai/x402/extensions/erc20_approval_gas_sponsoring/types.py
new file mode 100644
index 00000000..d38c4b52
--- /dev/null
+++ b/python/x402/src/bankofai/x402/extensions/erc20_approval_gas_sponsoring/types.py
@@ -0,0 +1,87 @@
+"""Type definitions for the ERC-20 Approval Gas Sponsoring Extension."""
+
+from dataclasses import dataclass
+from typing import Any, Protocol
+
+from ...interfaces import FacilitatorExtension
+
+
+class Erc20ApprovalGasSponsoringSigner(Protocol):
+    def get_addresses(self) -> list[str]: ...
+
+    def read_contract(
+        self, address: str, abi: list[dict[str, Any]], function_name: str, *args: Any
+    ) -> Any: ...
+
+    def verify_typed_data(
+        self,
+        address: str,
+        domain: dict[str, Any],
+        types: dict[str, Any],
+        primary_type: str,
+        message: dict[str, Any],
+        signature: bytes | str,
+    ) -> bool: ...
+
+    def write_contract(
+        self, address: str, abi: list[dict[str, Any]], function_name: str, *args: Any
+    ) -> str: ...
+
+    def send_transaction(self, to: str, data: bytes) -> str: ...
+
+    def wait_for_transaction_receipt(self, tx_hash: str): ...
+
+    def get_code(self, address: str) -> bytes: ...
+
+    def send_raw_transaction(self, serialized_tx: str) -> str: ...
+
+
+ERC20_APPROVAL_GAS_SPONSORING = FacilitatorExtension(key="erc20ApprovalGasSponsoring")
+ERC20_APPROVAL_GAS_SPONSORING_VERSION = "1"
+
+
+@dataclass(frozen=True)
+class Erc20ApprovalGasSponsoringExtension(FacilitatorExtension):
+    signer: Erc20ApprovalGasSponsoringSigner | None = None
+
+
+def create_erc20_approval_gas_sponsoring_extension(
+    signer: Erc20ApprovalGasSponsoringSigner,
+) -> Erc20ApprovalGasSponsoringExtension:
+    return Erc20ApprovalGasSponsoringExtension(
+        key=ERC20_APPROVAL_GAS_SPONSORING.key,
+        signer=signer,
+    )
+
+
+@dataclass
+class Erc20ApprovalGasSponsoringInfo:
+    from_address: str
+    asset: str
+    spender: str
+    amount: str
+    signed_transaction: str
+    version: str
+
+    @classmethod
+    def from_dict(cls, data: dict[str, Any]) -> "Erc20ApprovalGasSponsoringInfo":
+        return cls(
+            from_address=str(data.get("from", "")),
+            asset=str(data.get("asset", "")),
+            spender=str(data.get("spender", "")),
+            amount=str(data.get("amount", "")),
+            signed_transaction=str(data.get("signedTransaction", "")),
+            version=str(data.get("version", "")),
+        )
+
+
+@dataclass
+class Erc20ApprovalGasSponsoringServerInfo:
+    description: str
+    version: str
+
+
+@dataclass
+class Erc20ApprovalGasSponsoringExtensionInfo:
+    info: Erc20ApprovalGasSponsoringInfo | Erc20ApprovalGasSponsoringServerInfo
+    schema: dict[str, Any]
diff --git a/python/x402/src/bankofai/x402/extensions/erc20_approval_gas_sponsoring/utils.py b/python/x402/src/bankofai/x402/extensions/erc20_approval_gas_sponsoring/utils.py
new file mode 100644
index 00000000..cc28d35b
--- /dev/null
+++ b/python/x402/src/bankofai/x402/extensions/erc20_approval_gas_sponsoring/utils.py
@@ -0,0 +1,46 @@
+"""Utility helpers for the ERC-20 Approval Gas Sponsoring Extension."""
+
+from typing import Any
+
+from .types import (
+    ERC20_APPROVAL_GAS_SPONSORING,
+    ERC20_APPROVAL_GAS_SPONSORING_VERSION,
+    Erc20ApprovalGasSponsoringInfo,
+)
+
+
+def declare_erc20_approval_gas_sponsoring_extension(
+    description: str = "ERC-20 approval gas sponsoring",
+) -> dict:
+    return {
+        ERC20_APPROVAL_GAS_SPONSORING.key: {
+            "info": {"description": description, "version": ERC20_APPROVAL_GAS_SPONSORING_VERSION},
+            "schema": {},
+        }
+    }
+
+
+def extract_erc20_approval_gas_sponsoring_info(
+    payment_payload_extensions: dict[str, Any] | None,
+) -> Erc20ApprovalGasSponsoringInfo | None:
+    if not payment_payload_extensions:
+        return None
+    raw = payment_payload_extensions.get(ERC20_APPROVAL_GAS_SPONSORING.key)
+    if not isinstance(raw, dict):
+        return None
+    info = raw.get("info")
+    if not isinstance(info, dict):
+        return None
+    return Erc20ApprovalGasSponsoringInfo.from_dict(info)
+
+
+def validate_erc20_approval_gas_sponsoring_info(info: Erc20ApprovalGasSponsoringInfo) -> bool:
+    required = [
+        info.from_address,
+        info.asset,
+        info.spender,
+        info.amount,
+        info.signed_transaction,
+        info.version,
+    ]
+    return all(bool(v) for v in required)
diff --git a/python/x402/src/bankofai/x402/extensions/trc20_approval_gas_sponsoring/__init__.py b/python/x402/src/bankofai/x402/extensions/trc20_approval_gas_sponsoring/__init__.py
new file mode 100644
index 00000000..7576ca2d
--- /dev/null
+++ b/python/x402/src/bankofai/x402/extensions/trc20_approval_gas_sponsoring/__init__.py
@@ -0,0 +1,29 @@
+"""TRC-20 Approval Gas Sponsoring Extension for x402 v2."""
+
+from .types import (
+    TRC20_APPROVAL_GAS_SPONSORING,
+    TRC20_APPROVAL_GAS_SPONSORING_VERSION,
+    Trc20ApprovalGasSponsoringExtension,
+    Trc20ApprovalGasSponsoringInfo,
+    Trc20ApprovalGasSponsoringServerInfo,
+    Trc20ApprovalGasSponsoringSigner,
+    create_trc20_approval_gas_sponsoring_extension,
+)
+from .utils import (
+    declare_trc20_approval_gas_sponsoring_extension,
+    extract_trc20_approval_gas_sponsoring_info,
+    validate_trc20_approval_gas_sponsoring_info,
+)
+
+__all__ = [
+    "TRC20_APPROVAL_GAS_SPONSORING",
+    "TRC20_APPROVAL_GAS_SPONSORING_VERSION",
+    "Trc20ApprovalGasSponsoringExtension",
+    "Trc20ApprovalGasSponsoringSigner",
+    "Trc20ApprovalGasSponsoringInfo",
+    "Trc20ApprovalGasSponsoringServerInfo",
+    "create_trc20_approval_gas_sponsoring_extension",
+    "declare_trc20_approval_gas_sponsoring_extension",
+    "extract_trc20_approval_gas_sponsoring_info",
+    "validate_trc20_approval_gas_sponsoring_info",
+]
diff --git a/python/x402/src/bankofai/x402/extensions/trc20_approval_gas_sponsoring/types.py b/python/x402/src/bankofai/x402/extensions/trc20_approval_gas_sponsoring/types.py
new file mode 100644
index 00000000..7f6c3a0b
--- /dev/null
+++ b/python/x402/src/bankofai/x402/extensions/trc20_approval_gas_sponsoring/types.py
@@ -0,0 +1,83 @@
+"""Type definitions for the TRC-20 Approval Gas Sponsoring Extension."""
+
+import json
+from dataclasses import dataclass
+from typing import Any, Protocol
+
+from ...interfaces import FacilitatorExtension
+
+
+class Trc20ApprovalGasSponsoringSigner(Protocol):
+    def get_addresses(self) -> list[str]: ...
+
+    def read_contract(
+        self,
+        address: str,
+        function_name: str,
+        args: list[Any] | None = None,
+    ) -> Any: ...
+
+    def wait_for_transaction_receipt(self, tx_hash: str): ...
+
+    def send_raw_transaction(self, signed_transaction: dict[str, Any]) -> str: ...
+
+    def get_sign_weight(self, transaction: Any) -> Any: ...
+
+
+TRC20_APPROVAL_GAS_SPONSORING = FacilitatorExtension(key="trc20ApprovalGasSponsoring")
+TRC20_APPROVAL_GAS_SPONSORING_VERSION = "1"
+
+
+@dataclass(frozen=True)
+class Trc20ApprovalGasSponsoringExtension(FacilitatorExtension):
+    signer: Trc20ApprovalGasSponsoringSigner | None = None
+
+
+def create_trc20_approval_gas_sponsoring_extension(
+    signer: Trc20ApprovalGasSponsoringSigner,
+) -> Trc20ApprovalGasSponsoringExtension:
+    return Trc20ApprovalGasSponsoringExtension(
+        key=TRC20_APPROVAL_GAS_SPONSORING.key,
+        signer=signer,
+    )
+
+
+@dataclass
+class Trc20ApprovalGasSponsoringInfo:
+    from_address: str
+    asset: str
+    spender: str
+    amount: str
+    signed_transaction: dict[str, Any]
+    version: str
+
+    @classmethod
+    def from_dict(cls, data: dict[str, Any]) -> "Trc20ApprovalGasSponsoringInfo":
+        signed_tx = data.get("signedTransaction")
+        if isinstance(signed_tx, str):
+            try:
+                signed_tx = json.loads(signed_tx)
+            except Exception:
+                signed_tx = {}
+        if not isinstance(signed_tx, dict):
+            signed_tx = {}
+        return cls(
+            from_address=str(data.get("from", "")),
+            asset=str(data.get("asset", "")),
+            spender=str(data.get("spender", "")),
+            amount=str(data.get("amount", "")),
+            signed_transaction=signed_tx,
+            version=str(data.get("version", "")),
+        )
+
+
+@dataclass
+class Trc20ApprovalGasSponsoringServerInfo:
+    description: str
+    version: str
+
+
+@dataclass
+class Trc20ApprovalGasSponsoringExtensionInfo:
+    info: Trc20ApprovalGasSponsoringInfo | Trc20ApprovalGasSponsoringServerInfo
+    schema: dict[str, Any]
diff --git a/python/x402/src/bankofai/x402/extensions/trc20_approval_gas_sponsoring/utils.py b/python/x402/src/bankofai/x402/extensions/trc20_approval_gas_sponsoring/utils.py
new file mode 100644
index 00000000..68056d1a
--- /dev/null
+++ b/python/x402/src/bankofai/x402/extensions/trc20_approval_gas_sponsoring/utils.py
@@ -0,0 +1,46 @@
+"""Utility helpers for the TRC-20 Approval Gas Sponsoring Extension."""
+
+from typing import Any
+
+from .types import (
+    TRC20_APPROVAL_GAS_SPONSORING,
+    TRC20_APPROVAL_GAS_SPONSORING_VERSION,
+    Trc20ApprovalGasSponsoringInfo,
+)
+
+
+def declare_trc20_approval_gas_sponsoring_extension(
+    description: str = "TRC-20 approval gas sponsoring",
+) -> dict:
+    return {
+        TRC20_APPROVAL_GAS_SPONSORING.key: {
+            "info": {"description": description, "version": TRC20_APPROVAL_GAS_SPONSORING_VERSION},
+            "schema": {},
+        }
+    }
+
+
+def extract_trc20_approval_gas_sponsoring_info(
+    payment_payload_extensions: dict[str, Any] | None,
+) -> Trc20ApprovalGasSponsoringInfo | None:
+    if not payment_payload_extensions:
+        return None
+    raw = payment_payload_extensions.get(TRC20_APPROVAL_GAS_SPONSORING.key)
+    if not isinstance(raw, dict):
+        return None
+    info = raw.get("info")
+    if not isinstance(info, dict):
+        return None
+    return Trc20ApprovalGasSponsoringInfo.from_dict(info)
+
+
+def validate_trc20_approval_gas_sponsoring_info(info: Trc20ApprovalGasSponsoringInfo) -> bool:
+    required = [
+        info.from_address,
+        info.asset,
+        info.spender,
+        info.amount,
+        info.signed_transaction,
+        info.version,
+    ]
+    return all(bool(v) for v in required)
diff --git a/python/x402/src/bankofai/x402/http/clients/httpx.py b/python/x402/src/bankofai/x402/http/clients/httpx.py
index 80811bb3..3fcb2589 100644
--- a/python/x402/src/bankofai/x402/http/clients/httpx.py
+++ b/python/x402/src/bankofai/x402/http/clients/httpx.py
@@ -143,7 +143,8 @@ def get_header(name: str) -> str | None:
         except PaymentError:
             raise
         except Exception as e:
-            raise PaymentError(f"Failed to handle payment: {e}") from e
+            error_detail = f"{type(e).__name__}: {e}" if str(e) else type(e).__name__
+            raise PaymentError(f"Failed to handle payment: {error_detail}") from e
 
     async def aclose(self) -> None:
         """Close the underlying transport."""
diff --git a/python/x402/src/bankofai/x402/interfaces.py b/python/x402/src/bankofai/x402/interfaces.py
index 456a5974..d632f9c7 100644
--- a/python/x402/src/bankofai/x402/interfaces.py
+++ b/python/x402/src/bankofai/x402/interfaces.py
@@ -63,6 +63,13 @@ def get_extension(self, key: str) -> FacilitatorExtension | None:
         return self._extensions.get(key)
 
 
+@dataclass(frozen=True)
+class PaymentPayloadContext:
+    """Context passed to client schemes during payload creation."""
+
+    extensions: dict[str, Any] | None = None
+
+
 # ============================================================================
 # Client-Side Protocols
 # ============================================================================
@@ -98,11 +105,13 @@ def scheme(self) -> str:
     def create_payment_payload(
         self,
         requirements: PaymentRequirements,
+        context: PaymentPayloadContext | None = None,
     ) -> dict[str, Any]:
         """Create the scheme-specific inner payload dict.
 
         Args:
             requirements: The payment requirements to fulfill.
+            context: Optional context with server-declared extensions.
 
         Returns:
             Scheme-specific payload dict. x402Client wraps this into
@@ -125,11 +134,13 @@ def scheme(self) -> str:
     def create_payment_payload(
         self,
         requirements: PaymentRequirementsV1,
+        context: PaymentPayloadContext | None = None,
     ) -> dict[str, Any]:
         """Create the scheme-specific inner payload dict for V1.
 
         Args:
             requirements: The V1 payment requirements to fulfill.
+            context: Optional context with server-declared extensions.
 
         Returns:
             Scheme-specific payload dict. x402Client wraps this into
diff --git a/python/x402/src/bankofai/x402/mechanisms/evm/README.md b/python/x402/src/bankofai/x402/mechanisms/evm/README.md
index 4a6b513b..9532487e 100644
--- a/python/x402/src/bankofai/x402/mechanisms/evm/README.md
+++ b/python/x402/src/bankofai/x402/mechanisms/evm/README.md
@@ -27,7 +27,9 @@ from bankofai.x402.mechanisms.evm import EthAccountSigner
 from eth_account import Account
 
 account = Account.from_key("0x...")
-signer = EthAccountSigner(account)
+signer = EthAccountSigner(account, rpc_url="https://your-rpc")
+# Or set EVM_RPC_URL_<CHAIN_ID> / EVM_RPC_URL / WEB3_PROVIDER_URL and omit rpc_url.
+# SDK resolves RPC per network and falls back to testnet defaults for known chains.
 
 client = x402Client()
 client.register("eip155:*", ExactEvmScheme(signer=signer))
@@ -127,4 +129,3 @@ Automatic handling of:
 - Deployed smart wallets (ERC-1271 signature verification)
 - Undeployed smart wallets (ERC-6492 counterfactual verification)
 - EOA wallets (standard ECDSA)
-
diff --git a/python/x402/src/bankofai/x402/mechanisms/evm/__init__.py b/python/x402/src/bankofai/x402/mechanisms/evm/__init__.py
index 375436d2..3f254066 100644
--- a/python/x402/src/bankofai/x402/mechanisms/evm/__init__.py
+++ b/python/x402/src/bankofai/x402/mechanisms/evm/__init__.py
@@ -5,9 +5,26 @@
     AUTHORIZATION_STATE_ABI,
     BALANCE_OF_ABI,
     DEFAULT_DECIMALS,
+    DEFAULT_MAX_FEE_PER_GAS,
+    DEFAULT_MAX_PRIORITY_FEE_PER_GAS,
     DEFAULT_VALIDITY_PERIOD,
     EIP1271_MAGIC_VALUE,
+    EIP2612_NONCES_ABI,
+    EIP2612_PERMIT_TYPES,
+    ERC20_ALLOWANCE_ABI,
+    ERC20_APPROVE_ABI,
+    ERC20_APPROVE_GAS_LIMIT,
     ERC6492_MAGIC_VALUE,
+    ERR_EIP2612_ASSET_MISMATCH,
+    ERR_EIP2612_DEADLINE_EXPIRED,
+    ERR_EIP2612_EXTENSION_FORMAT,
+    ERR_EIP2612_FROM_MISMATCH,
+    ERR_EIP2612_SPENDER_NOT_PERMIT2,
+    ERR_ERC20_APPROVAL_ASSET_MISMATCH,
+    ERR_ERC20_APPROVAL_EXTENSION_FORMAT,
+    ERR_ERC20_APPROVAL_FROM_MISMATCH,
+    ERR_ERC20_APPROVAL_SPENDER_NOT_PERMIT2,
+    ERR_ERC20_APPROVAL_TX_FAILED,
     ERR_FAILED_TO_GET_ASSET_INFO,
     ERR_FAILED_TO_GET_NETWORK_CONFIG,
     ERR_FAILED_TO_VERIFY_SIGNATURE,
@@ -17,6 +34,21 @@
     ERR_MISSING_EIP712_DOMAIN,
     ERR_NETWORK_MISMATCH,
     ERR_NONCE_ALREADY_USED,
+    ERR_PERMIT2_2612_AMOUNT_MISMATCH,
+    ERR_PERMIT2_ALLOWANCE_REQUIRED,
+    ERR_PERMIT2_AMOUNT_MISMATCH,
+    ERR_PERMIT2_DEADLINE_EXPIRED,
+    ERR_PERMIT2_INVALID_AMOUNT,
+    ERR_PERMIT2_INVALID_DESTINATION,
+    ERR_PERMIT2_INVALID_FACILITATOR,
+    ERR_PERMIT2_INVALID_NONCE,
+    ERR_PERMIT2_INVALID_OWNER,
+    ERR_PERMIT2_INVALID_SIGNATURE,
+    ERR_PERMIT2_INVALID_SPENDER,
+    ERR_PERMIT2_NOT_YET_VALID,
+    ERR_PERMIT2_PAYMENT_TOO_EARLY,
+    ERR_PERMIT2_RECIPIENT_MISMATCH,
+    ERR_PERMIT2_TOKEN_MISMATCH,
     ERR_RECIPIENT_MISMATCH,
     ERR_SMART_WALLET_DEPLOYMENT_FAILED,
     ERR_TRANSACTION_FAILED,
@@ -26,13 +58,21 @@
     ERR_VALID_BEFORE_EXPIRED,
     IS_VALID_SIGNATURE_ABI,
     NETWORK_CONFIGS,
+    PERMIT2_ADDRESS,
+    PERMIT2_ADDRESSES,
+    PERMIT2_WITNESS_TYPES,
     SCHEME_EXACT,
     TRANSFER_WITH_AUTHORIZATION_BYTES_ABI,
     TRANSFER_WITH_AUTHORIZATION_VRS_ABI,
     TX_STATUS_FAILED,
     TX_STATUS_SUCCESS,
+    X402_EXACT_PERMIT2_PROXY_ADDRESS,
+    X402_EXACT_PERMIT2_PROXY_ADDRESSES,
     AssetInfo,
     NetworkConfig,
+    get_permit2_address,
+    get_x402_exact_permit2_proxy_address,
+    x402ExactPermit2ProxyABI,
 )
 
 # EIP-712
@@ -67,9 +107,13 @@
     ExactEIP3009Payload,
     ExactEvmPayloadV1,
     ExactEvmPayloadV2,
+    ExactPermit2Payload,
+    Permit2Authorization,
+    Permit2Witness,
     TransactionReceipt,
     TypedDataDomain,
     TypedDataField,
+    is_permit2_payload,
 )
 
 # Utilities
@@ -127,6 +171,31 @@
     "ERR_NETWORK_MISMATCH",
     "ERR_UNSUPPORTED_SCHEME",
     "ERR_TRANSACTION_FAILED",
+    "ERR_PERMIT2_INVALID_SPENDER",
+    "ERR_PERMIT2_RECIPIENT_MISMATCH",
+    "ERR_PERMIT2_INVALID_FACILITATOR",
+    "ERR_PERMIT2_DEADLINE_EXPIRED",
+    "ERR_PERMIT2_NOT_YET_VALID",
+    "ERR_PERMIT2_AMOUNT_MISMATCH",
+    "ERR_PERMIT2_TOKEN_MISMATCH",
+    "ERR_PERMIT2_INVALID_SIGNATURE",
+    "ERR_PERMIT2_ALLOWANCE_REQUIRED",
+    "ERR_PERMIT2_INVALID_AMOUNT",
+    "ERR_PERMIT2_INVALID_DESTINATION",
+    "ERR_PERMIT2_INVALID_OWNER",
+    "ERR_PERMIT2_PAYMENT_TOO_EARLY",
+    "ERR_PERMIT2_INVALID_NONCE",
+    "ERR_PERMIT2_2612_AMOUNT_MISMATCH",
+    "ERR_EIP2612_EXTENSION_FORMAT",
+    "ERR_EIP2612_FROM_MISMATCH",
+    "ERR_EIP2612_ASSET_MISMATCH",
+    "ERR_EIP2612_SPENDER_NOT_PERMIT2",
+    "ERR_EIP2612_DEADLINE_EXPIRED",
+    "ERR_ERC20_APPROVAL_EXTENSION_FORMAT",
+    "ERR_ERC20_APPROVAL_FROM_MISMATCH",
+    "ERR_ERC20_APPROVAL_ASSET_MISMATCH",
+    "ERR_ERC20_APPROVAL_SPENDER_NOT_PERMIT2",
+    "ERR_ERC20_APPROVAL_TX_FAILED",
     "ERR_FAILED_TO_GET_NETWORK_CONFIG",
     "ERR_FAILED_TO_GET_ASSET_INFO",
     "ERR_FAILED_TO_VERIFY_SIGNATURE",
@@ -134,20 +203,39 @@
     "TRANSFER_WITH_AUTHORIZATION_BYTES_ABI",
     "AUTHORIZATION_STATE_ABI",
     "BALANCE_OF_ABI",
+    "ERC20_ALLOWANCE_ABI",
+    "ERC20_APPROVE_ABI",
+    "EIP2612_PERMIT_TYPES",
+    "EIP2612_NONCES_ABI",
+    "ERC20_APPROVE_GAS_LIMIT",
+    "DEFAULT_MAX_FEE_PER_GAS",
+    "DEFAULT_MAX_PRIORITY_FEE_PER_GAS",
     "IS_VALID_SIGNATURE_ABI",
+    "PERMIT2_WITNESS_TYPES",
+    "PERMIT2_ADDRESS",
+    "PERMIT2_ADDRESSES",
+    "X402_EXACT_PERMIT2_PROXY_ADDRESS",
+    "X402_EXACT_PERMIT2_PROXY_ADDRESSES",
+    "get_permit2_address",
+    "get_x402_exact_permit2_proxy_address",
+    "x402ExactPermit2ProxyABI",
     "AssetInfo",
     "NetworkConfig",
     # Types
     "ExactEIP3009Authorization",
     "ExactEIP3009Payload",
+    "ExactPermit2Payload",
     "ExactEvmPayloadV1",
     "ExactEvmPayloadV2",
+    "Permit2Authorization",
+    "Permit2Witness",
     "TypedDataDomain",
     "TypedDataField",
     "TransactionReceipt",
     "ERC6492SignatureData",
     "AUTHORIZATION_TYPES",
     "DOMAIN_TYPES",
+    "is_permit2_payload",
     # Signer protocols
     "ClientEvmSigner",
     "FacilitatorEvmSigner",
diff --git a/python/x402/src/bankofai/x402/mechanisms/evm/constants.py b/python/x402/src/bankofai/x402/mechanisms/evm/constants.py
index 2531b26b..c6fddbdf 100644
--- a/python/x402/src/bankofai/x402/mechanisms/evm/constants.py
+++ b/python/x402/src/bankofai/x402/mechanisms/evm/constants.py
@@ -48,6 +48,42 @@
 ERR_FAILED_TO_GET_ASSET_INFO = "invalid_exact_evm_failed_to_get_asset_info"
 ERR_FAILED_TO_VERIFY_SIGNATURE = "invalid_exact_evm_failed_to_verify_signature"
 ERR_TRANSACTION_FAILED = "transaction_failed"
+# Permit2 verify errors
+ERR_PERMIT2_INVALID_SPENDER = "invalid_permit2_spender"
+ERR_PERMIT2_RECIPIENT_MISMATCH = "invalid_permit2_recipient_mismatch"
+ERR_PERMIT2_INVALID_FACILITATOR = "invalid_permit2_facilitator_mismatch"
+ERR_PERMIT2_DEADLINE_EXPIRED = "permit2_deadline_expired"
+ERR_PERMIT2_NOT_YET_VALID = "permit2_not_yet_valid"
+ERR_PERMIT2_AMOUNT_MISMATCH = "permit2_amount_mismatch"
+ERR_PERMIT2_TOKEN_MISMATCH = "permit2_token_mismatch"
+ERR_PERMIT2_INVALID_SIGNATURE = "invalid_permit2_signature"
+ERR_PERMIT2_ALLOWANCE_REQUIRED = "permit2_allowance_required"
+# Permit2 settle errors
+ERR_PERMIT2_INVALID_AMOUNT = "permit2_invalid_amount"
+ERR_PERMIT2_INVALID_DESTINATION = "permit2_invalid_destination"
+ERR_PERMIT2_INVALID_OWNER = "permit2_invalid_owner"
+ERR_PERMIT2_PAYMENT_TOO_EARLY = "permit2_payment_too_early"
+ERR_PERMIT2_INVALID_NONCE = "permit2_invalid_nonce"
+ERR_PERMIT2_2612_AMOUNT_MISMATCH = "permit2_2612_amount_mismatch"
+# EIP-2612 extension verify errors
+ERR_EIP2612_EXTENSION_FORMAT = "invalid_eip2612_extension_format"
+ERR_EIP2612_FROM_MISMATCH = "eip2612_from_mismatch"
+ERR_EIP2612_ASSET_MISMATCH = "eip2612_asset_mismatch"
+ERR_EIP2612_SPENDER_NOT_PERMIT2 = "eip2612_spender_not_permit2"
+ERR_EIP2612_DEADLINE_EXPIRED = "eip2612_deadline_expired"
+# ERC-20 approval extension verify errors
+ERR_ERC20_APPROVAL_EXTENSION_FORMAT = "invalid_erc20_approval_extension_format"
+ERR_ERC20_APPROVAL_FROM_MISMATCH = "erc20_approval_from_mismatch"
+ERR_ERC20_APPROVAL_ASSET_MISMATCH = "erc20_approval_asset_mismatch"
+ERR_ERC20_APPROVAL_SPENDER_NOT_PERMIT2 = "erc20_approval_spender_not_permit2"
+ERR_ERC20_APPROVAL_TX_WRONG_TARGET = "erc20_approval_tx_wrong_target"
+ERR_ERC20_APPROVAL_TX_WRONG_SELECTOR = "erc20_approval_tx_wrong_selector"
+ERR_ERC20_APPROVAL_TX_WRONG_SPENDER = "erc20_approval_tx_wrong_spender"
+ERR_ERC20_APPROVAL_TX_INVALID_CALLDATA = "erc20_approval_tx_invalid_calldata"
+ERR_ERC20_APPROVAL_TX_SIGNER_MISMATCH = "erc20_approval_tx_signer_mismatch"
+ERR_ERC20_APPROVAL_TX_INVALID_SIGNATURE = "erc20_approval_tx_invalid_signature"
+ERR_ERC20_APPROVAL_TX_PARSE_FAILED = "erc20_approval_tx_parse_failed"
+ERR_ERC20_APPROVAL_TX_FAILED = "erc20_approval_tx_failed"
 
 
 class _AssetInfoRequired(TypedDict):
@@ -76,6 +112,7 @@ class NetworkConfig(_NetworkConfigRequired, total=False):
     """Configuration for an EVM network."""
 
     default_asset: AssetInfo
+    default_rpc_url: str
 
 
 # Network configurations
@@ -93,6 +130,7 @@ class NetworkConfig(_NetworkConfigRequired, total=False):
     # Base Sepolia (Testnet)
     "eip155:84532": {
         "chain_id": 84532,
+        "default_rpc_url": "https://sepolia.base.org",
         "default_asset": {
             "address": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
             "name": "USDC",
@@ -100,6 +138,11 @@ class NetworkConfig(_NetworkConfigRequired, total=False):
             "decimals": 6,
         },
     },
+    # BSC Testnet
+    "eip155:97": {
+        "chain_id": 97,
+        "default_rpc_url": "https://bsc-testnet-rpc.publicnode.com",
+    },
     # MegaETH Mainnet (uses Permit2 instead of EIP-3009, supports EIP-2612)
     "eip155:4326": {
         "chain_id": 4326,
@@ -189,6 +232,56 @@ class NetworkConfig(_NetworkConfigRequired, total=False):
     }
 ]
 
+ERC20_APPROVE_ABI = [
+    {
+        "inputs": [
+            {"name": "spender", "type": "address"},
+            {"name": "amount", "type": "uint256"},
+        ],
+        "name": "approve",
+        "outputs": [{"name": "", "type": "bool"}],
+        "stateMutability": "nonpayable",
+        "type": "function",
+    }
+]
+
+ERC20_ALLOWANCE_ABI = [
+    {
+        "inputs": [
+            {"name": "owner", "type": "address"},
+            {"name": "spender", "type": "address"},
+        ],
+        "name": "allowance",
+        "outputs": [{"name": "", "type": "uint256"}],
+        "stateMutability": "view",
+        "type": "function",
+    }
+]
+
+EIP2612_PERMIT_TYPES: dict[str, list[dict[str, str]]] = {
+    "Permit": [
+        {"name": "owner", "type": "address"},
+        {"name": "spender", "type": "address"},
+        {"name": "value", "type": "uint256"},
+        {"name": "nonce", "type": "uint256"},
+        {"name": "deadline", "type": "uint256"},
+    ]
+}
+
+EIP2612_NONCES_ABI = [
+    {
+        "type": "function",
+        "name": "nonces",
+        "inputs": [{"name": "owner", "type": "address"}],
+        "outputs": [{"type": "uint256"}],
+        "stateMutability": "view",
+    }
+]
+
+ERC20_APPROVE_GAS_LIMIT = 70_000
+DEFAULT_MAX_FEE_PER_GAS = 1_000_000_000
+DEFAULT_MAX_PRIORITY_FEE_PER_GAS = 100_000_000
+
 IS_VALID_SIGNATURE_ABI = [
     {
         "inputs": [
@@ -201,3 +294,139 @@ class NetworkConfig(_NetworkConfigRequired, total=False):
         "type": "function",
     }
 ]
+
+# Permit2 EIP-712 types for signing PermitWitnessTransferFrom.
+# Types must be in alphabetical order after the primary type.
+PERMIT2_WITNESS_TYPES: dict[str, list[dict[str, str]]] = {
+    "PermitWitnessTransferFrom": [
+        {"name": "permitted", "type": "TokenPermissions"},
+        {"name": "spender", "type": "address"},
+        {"name": "nonce", "type": "uint256"},
+        {"name": "deadline", "type": "uint256"},
+        {"name": "witness", "type": "Witness"},
+    ],
+    "TokenPermissions": [
+        {"name": "token", "type": "address"},
+        {"name": "amount", "type": "uint256"},
+    ],
+    "Witness": [
+        {"name": "to", "type": "address"},
+        {"name": "facilitator", "type": "address"},
+        {"name": "validAfter", "type": "uint256"},
+    ],
+}
+
+# Canonical Permit2 address and overrides.
+PERMIT2_ADDRESS = "0x000000000022D473030F116dDEE9F6B43aC78BA3"
+PERMIT2_ADDRESSES: dict[str, str] = {
+    "eip155:56": "0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768",
+    "eip155:97": "0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768",
+}
+
+# x402 exact Permit2 proxy addresses.
+X402_EXACT_PERMIT2_PROXY_ADDRESS = "0xEe38Ec718255fe78e9D16aCC0e1183C731679b23"
+X402_EXACT_PERMIT2_PROXY_ADDRESSES: dict[str, str] = {
+    "eip155:56": X402_EXACT_PERMIT2_PROXY_ADDRESS,
+    "eip155:97": X402_EXACT_PERMIT2_PROXY_ADDRESS,
+}
+
+
+def get_permit2_address(network: str) -> str:
+    """Resolve Permit2 contract address for a network."""
+    return PERMIT2_ADDRESSES.get(network, PERMIT2_ADDRESS)
+
+
+def get_x402_exact_permit2_proxy_address(network: str) -> str:
+    """Resolve x402 exact Permit2 proxy address for a network."""
+    return X402_EXACT_PERMIT2_PROXY_ADDRESSES.get(network, X402_EXACT_PERMIT2_PROXY_ADDRESS)
+
+
+_PERMIT2_WITNESS_ABI_COMPONENTS = [
+    {"name": "to", "type": "address", "internalType": "address"},
+    {"name": "facilitator", "type": "address", "internalType": "address"},
+    {"name": "validAfter", "type": "uint256", "internalType": "uint256"},
+]
+
+# x402ExactPermit2Proxy ABI (settle + settleWithPermit).
+x402ExactPermit2ProxyABI = [
+    {
+        "type": "function",
+        "name": "settle",
+        "inputs": [
+            {
+                "name": "permit",
+                "type": "tuple",
+                "internalType": "struct ISignatureTransfer.PermitTransferFrom",
+                "components": [
+                    {
+                        "name": "permitted",
+                        "type": "tuple",
+                        "internalType": "struct ISignatureTransfer.TokenPermissions",
+                        "components": [
+                            {"name": "token", "type": "address", "internalType": "address"},
+                            {"name": "amount", "type": "uint256", "internalType": "uint256"},
+                        ],
+                    },
+                    {"name": "nonce", "type": "uint256", "internalType": "uint256"},
+                    {"name": "deadline", "type": "uint256", "internalType": "uint256"},
+                ],
+            },
+            {"name": "owner", "type": "address", "internalType": "address"},
+            {
+                "name": "witness",
+                "type": "tuple",
+                "internalType": "struct x402ExactPermit2Proxy.Witness",
+                "components": _PERMIT2_WITNESS_ABI_COMPONENTS,
+            },
+            {"name": "signature", "type": "bytes", "internalType": "bytes"},
+        ],
+        "outputs": [],
+        "stateMutability": "nonpayable",
+    },
+    {
+        "type": "function",
+        "name": "settleWithPermit",
+        "inputs": [
+            {
+                "name": "permit2612",
+                "type": "tuple",
+                "internalType": "struct x402ExactPermit2Proxy.EIP2612Permit",
+                "components": [
+                    {"name": "value", "type": "uint256", "internalType": "uint256"},
+                    {"name": "deadline", "type": "uint256", "internalType": "uint256"},
+                    {"name": "r", "type": "bytes32", "internalType": "bytes32"},
+                    {"name": "s", "type": "bytes32", "internalType": "bytes32"},
+                    {"name": "v", "type": "uint8", "internalType": "uint8"},
+                ],
+            },
+            {
+                "name": "permit",
+                "type": "tuple",
+                "internalType": "struct ISignatureTransfer.PermitTransferFrom",
+                "components": [
+                    {
+                        "name": "permitted",
+                        "type": "tuple",
+                        "internalType": "struct ISignatureTransfer.TokenPermissions",
+                        "components": [
+                            {"name": "token", "type": "address", "internalType": "address"},
+                            {"name": "amount", "type": "uint256", "internalType": "uint256"},
+                        ],
+                    },
+                    {"name": "nonce", "type": "uint256", "internalType": "uint256"},
+                    {"name": "deadline", "type": "uint256", "internalType": "uint256"},
+                ],
+            },
+            {"name": "owner", "type": "address", "internalType": "address"},
+            {
+                "name": "witness",
+                "type": "tuple",
+                "internalType": "struct x402ExactPermit2Proxy.Witness",
+                "components": _PERMIT2_WITNESS_ABI_COMPONENTS,
+            },
+            {"name": "signature", "type": "bytes", "internalType": "bytes"},
+        ],
+        "outputs": [],
+        "stateMutability": "nonpayable",
+    },
+]
diff --git a/python/x402/src/bankofai/x402/mechanisms/evm/exact/client.py b/python/x402/src/bankofai/x402/mechanisms/evm/exact/client.py
index 66157a82..a24a85e5 100644
--- a/python/x402/src/bankofai/x402/mechanisms/evm/exact/client.py
+++ b/python/x402/src/bankofai/x402/mechanisms/evm/exact/client.py
@@ -5,8 +5,20 @@
 from datetime import timedelta
 from typing import Any
 
+from ....extensions.eip2612_gas_sponsoring import EIP2612_GAS_SPONSORING
+from ....extensions.erc20_approval_gas_sponsoring import ERC20_APPROVAL_GAS_SPONSORING
+from ....interfaces import PaymentPayloadContext
 from ....schemas import PaymentRequirements
-from ..constants import SCHEME_EXACT
+from ..constants import (
+    DEFAULT_MAX_FEE_PER_GAS,
+    DEFAULT_MAX_PRIORITY_FEE_PER_GAS,
+    EIP2612_NONCES_ABI,
+    EIP2612_PERMIT_TYPES,
+    ERC20_ALLOWANCE_ABI,
+    ERC20_APPROVE_GAS_LIMIT,
+    SCHEME_EXACT,
+    get_permit2_address,
+)
 from ..eip712 import build_typed_data_for_signing
 from ..signer import ClientEvmSigner
 from ..types import ExactEIP3009Authorization, ExactEIP3009Payload, TypedDataField
@@ -15,10 +27,12 @@
     create_validity_window,
     get_asset_info,
     get_evm_chain_id,
+    resolve_evm_rpc_url,
 )
+from .permit2 import create_permit2_payload
 
 
-def _wrap_if_local_account(signer: Any) -> ClientEvmSigner:
+def _wrap_if_local_account(signer: Any, network: str | None = None) -> ClientEvmSigner:
     """Auto-wrap eth_account LocalAccount in EthAccountSigner if needed."""
     try:
         from eth_account.signers.local import LocalAccount
@@ -26,7 +40,8 @@ def _wrap_if_local_account(signer: Any) -> ClientEvmSigner:
         if isinstance(signer, LocalAccount):
             from ..signers import EthAccountSigner
 
-            return EthAccountSigner(signer)
+            rpc_url = resolve_evm_rpc_url(network)
+            return EthAccountSigner(signer, rpc_url=rpc_url, network=network)
     except ImportError:
         pass
     return signer
@@ -52,12 +67,17 @@ def __init__(self, signer: ClientEvmSigner):
                 eth_account LocalAccount, which will be auto-wrapped in
                 EthAccountSigner.
         """
+        self._raw_signer = signer
         self._signer = _wrap_if_local_account(signer)
+        self._network_signers: dict[str, ClientEvmSigner] = {}
+
+        # If signer is EthAccountSigner without RPC, approval extension will be unavailable.
 
     def create_payment_payload(
         self,
         requirements: PaymentRequirements,
-    ) -> dict[str, Any]:
+        context: PaymentPayloadContext | None = None,
+    ) -> dict[str, Any] | tuple[dict[str, Any], dict[str, Any]]:
         """Create signed EIP-3009 inner payload.
 
         Args:
@@ -67,13 +87,25 @@ def create_payment_payload(
             Inner payload dict (authorization + signature).
             x402Client wraps this with x402_version, accepted, resource, extensions.
         """
+        signer = self._resolve_signer_for_network(str(requirements.network))
+        extra = requirements.extra or {}
+        asset_transfer_method = extra.get("assetTransferMethod", "eip3009")
+        if asset_transfer_method == "permit2":
+            payload = create_permit2_payload(signer, requirements)
+            extensions = _try_build_gas_sponsoring_extensions(
+                signer, requirements, payload, context
+            )
+            if extensions:
+                return payload, extensions
+            return payload
+
         nonce = create_nonce()
         valid_after, valid_before = create_validity_window(
             timedelta(seconds=requirements.max_timeout_seconds or 3600)
         )
 
         authorization = ExactEIP3009Authorization(
-            from_address=self._signer.address,
+            from_address=signer.address,
             to=requirements.pay_to,
             value=requirements.amount,
             valid_after=str(valid_after),
@@ -81,7 +113,7 @@ def create_payment_payload(
             nonce=nonce,
         )
 
-        signature = self._sign_authorization(authorization, requirements)
+        signature = self._sign_authorization(signer, authorization, requirements)
 
         payload = ExactEIP3009Payload(authorization=authorization, signature=signature)
 
@@ -90,6 +122,7 @@ def create_payment_payload(
 
     def _sign_authorization(
         self,
+        signer: ClientEvmSigner,
         authorization: ExactEIP3009Authorization,
         requirements: PaymentRequirements,
     ) -> str:
@@ -140,6 +173,205 @@ def _sign_authorization(
                 TypedDataField(name=f["name"], type=f["type"]) for f in fields
             ]
 
-        sig_bytes = self._signer.sign_typed_data(domain, typed_fields, primary_type, message)
+        sig_bytes = signer.sign_typed_data(domain, typed_fields, primary_type, message)
 
         return "0x" + sig_bytes.hex()
+
+    def _resolve_signer_for_network(self, network: str) -> ClientEvmSigner:
+        """Resolve signer for a specific network.
+
+        For raw LocalAccount inputs, this creates a network-specific wrapped signer
+        (cached by network) so RPC selection can follow per-network defaults.
+        """
+        try:
+            from eth_account.signers.local import LocalAccount
+
+            if isinstance(self._raw_signer, LocalAccount):
+                if network not in self._network_signers:
+                    self._network_signers[network] = _wrap_if_local_account(
+                        self._raw_signer, network
+                    )
+                return self._network_signers[network]
+        except ImportError:
+            pass
+
+        return self._signer
+
+
+def _try_build_gas_sponsoring_extensions(
+    signer: ClientEvmSigner,
+    requirements: PaymentRequirements,
+    payload: dict[str, Any],
+    context: PaymentPayloadContext | None,
+) -> dict[str, Any] | None:
+    if context is None or not context.extensions:
+        return None
+
+    if EIP2612_GAS_SPONSORING.key in context.extensions:
+        eip2612 = _try_build_eip2612_extension(signer, requirements, payload)
+        if eip2612:
+            return {EIP2612_GAS_SPONSORING.key: {"info": eip2612, "schema": {}}}
+
+    if ERC20_APPROVAL_GAS_SPONSORING.key in context.extensions:
+        erc20 = _try_build_erc20_approval_extension(signer, requirements)
+        if erc20:
+            return {ERC20_APPROVAL_GAS_SPONSORING.key: {"info": erc20, "schema": {}}}
+
+    return None
+
+
+def _try_build_eip2612_extension(
+    signer: ClientEvmSigner,
+    requirements: PaymentRequirements,
+    payload: dict[str, Any],
+) -> dict[str, Any] | None:
+    if not hasattr(signer, "read_contract"):
+        return None
+    extra = requirements.extra or {}
+    token_name = extra.get("name")
+    token_version = extra.get("version")
+    if not token_name or not token_version:
+        return None
+
+    permit2_auth = payload.get("permit2Authorization") or {}
+    deadline = permit2_auth.get("deadline")
+    if not deadline:
+        return None
+
+    token_address = requirements.asset
+    permit2_address = get_permit2_address(str(requirements.network))
+    try:
+        allowance = signer.read_contract(
+            token_address, ERC20_ALLOWANCE_ABI, "allowance", signer.address, permit2_address
+        )
+        if int(allowance) >= int(requirements.amount):
+            return None
+    except Exception:
+        pass
+    try:
+        nonce = signer.read_contract(token_address, EIP2612_NONCES_ABI, "nonces", signer.address)
+    except Exception:
+        return None
+
+    chain_id = get_evm_chain_id(str(requirements.network))
+    domain = {
+        "name": token_name,
+        "version": token_version,
+        "chainId": chain_id,
+        "verifyingContract": token_address,
+    }
+    message = {
+        "owner": signer.address,
+        "spender": permit2_address,
+        "value": int(requirements.amount),
+        "nonce": int(nonce),
+        "deadline": int(deadline),
+    }
+    sig = signer.sign_typed_data(
+        domain=domain,
+        types={
+            k: [TypedDataField(name=f["name"], type=f["type"]) for f in v]
+            for k, v in EIP2612_PERMIT_TYPES.items()
+        },
+        primary_type="Permit",
+        message=message,
+    )
+
+    return {
+        "from": signer.address,
+        "asset": token_address,
+        "spender": permit2_address,
+        "amount": str(requirements.amount),
+        "nonce": str(nonce),
+        "deadline": str(deadline),
+        "signature": "0x" + sig.hex(),
+        "version": "1",
+    }
+
+
+def _try_build_erc20_approval_extension(
+    signer: ClientEvmSigner,
+    requirements: PaymentRequirements,
+) -> dict[str, Any] | None:
+    if not hasattr(signer, "sign_transaction") or not hasattr(signer, "get_transaction_count"):
+        return None
+
+    token_address = requirements.asset
+    permit2_address = get_permit2_address(str(requirements.network))
+    # Best-effort allowance check if available
+    if hasattr(signer, "read_contract"):
+        try:
+            allowance = signer.read_contract(
+                token_address, ERC20_ALLOWANCE_ABI, "allowance", signer.address, permit2_address
+            )
+            if int(allowance) >= int(requirements.amount):
+                return None
+        except Exception:
+            pass
+
+    data = _encode_erc20_approve(permit2_address)
+    nonce = signer.get_transaction_count(signer.address)
+    chain_id = get_evm_chain_id(str(requirements.network))
+    tx: dict[str, Any] = {
+        "to": token_address,
+        "data": data,
+        "value": 0,
+        "nonce": nonce,
+        "gas": ERC20_APPROVE_GAS_LIMIT,
+        "chainId": chain_id,
+    }
+    fees = None
+    if hasattr(signer, "estimate_fees_per_gas"):
+        try:
+            fees = signer.estimate_fees_per_gas()
+        except Exception:
+            fees = None
+    if fees:
+        max_fee, max_priority_fee = fees
+        tx["maxFeePerGas"] = max_fee
+        tx["maxPriorityFeePerGas"] = max_priority_fee
+    elif hasattr(signer, "get_gas_price"):
+        try:
+            tx["gasPrice"] = signer.get_gas_price()
+        except Exception:
+            tx["maxFeePerGas"] = DEFAULT_MAX_FEE_PER_GAS
+            tx["maxPriorityFeePerGas"] = DEFAULT_MAX_PRIORITY_FEE_PER_GAS
+    else:
+        tx["maxFeePerGas"] = DEFAULT_MAX_FEE_PER_GAS
+        tx["maxPriorityFeePerGas"] = DEFAULT_MAX_PRIORITY_FEE_PER_GAS
+    signed = signer.sign_transaction(tx)
+    signed_hex = _normalize_signed_tx(signed)
+    return {
+        "from": signer.address,
+        "asset": token_address,
+        "spender": permit2_address,
+        "amount": str(2**256 - 1),
+        "signedTransaction": signed_hex,
+        "version": "1",
+    }
+
+
+def _encode_erc20_approve(spender: str) -> str:
+    try:
+        from eth_abi import encode
+        from eth_utils import keccak
+
+        selector = keccak(text="approve(address,uint256)")[:4]
+        data = encode(["address", "uint256"], [spender, 2**256 - 1])
+        return "0x" + (selector + data).hex()
+    except Exception as e:
+        raise ValueError(f"failed to encode approve: {e}") from e
+
+
+def _normalize_signed_tx(signed: Any) -> str:
+    if isinstance(signed, bytes):
+        return "0x" + signed.hex()
+    if isinstance(signed, str):
+        return signed if signed.startswith("0x") else "0x" + signed
+    raw = getattr(signed, "rawTransaction", None)
+    if raw is not None:
+        if isinstance(raw, bytes):
+            return "0x" + raw.hex()
+        if isinstance(raw, str):
+            return raw if raw.startswith("0x") else "0x" + raw
+    raise ValueError("Unsupported signed transaction format")
diff --git a/python/x402/src/bankofai/x402/mechanisms/evm/exact/facilitator.py b/python/x402/src/bankofai/x402/mechanisms/evm/exact/facilitator.py
index ecf3b070..4a2fa70e 100644
--- a/python/x402/src/bankofai/x402/mechanisms/evm/exact/facilitator.py
+++ b/python/x402/src/bankofai/x402/mechanisms/evm/exact/facilitator.py
@@ -36,9 +36,15 @@
 from ..eip712 import hash_eip3009_authorization
 from ..erc6492 import has_deployment_info, parse_erc6492_signature
 from ..signer import FacilitatorEvmSigner
-from ..types import ERC6492SignatureData, ExactEIP3009Payload
+from ..types import (
+    ERC6492SignatureData,
+    ExactEIP3009Payload,
+    ExactPermit2Payload,
+    is_permit2_payload,
+)
 from ..utils import bytes_to_hex, get_evm_chain_id, hex_to_bytes, normalize_address
 from ..verify import verify_universal_signature
+from .permit2 import settle_permit2, verify_permit2
 
 
 @dataclass
@@ -77,14 +83,17 @@ def __init__(
         self._config = config or ExactEvmSchemeConfig()
 
     def get_extra(self, network: Network) -> dict[str, Any] | None:
-        """Get mechanism-specific extra data. EVM: None.
+        """Get mechanism-specific extra data.
 
         Args:
             network: Network identifier.
 
         Returns:
-            None for EVM scheme.
+            Extra metadata for Permit2 facilitator address.
         """
+        signers = self._signer.get_addresses()
+        if signers:
+            return {"permit2FacilitatorAddress": signers[0]}
         return None
 
     def get_signers(self, network: Network) -> list[str]:
@@ -122,7 +131,12 @@ def verify(
         Returns:
             VerifyResponse with is_valid and payer.
         """
-        evm_payload = ExactEIP3009Payload.from_dict(payload.payload)
+        raw_payload = payload.payload or {}
+        if is_permit2_payload(raw_payload):
+            permit2_payload = ExactPermit2Payload.from_dict(raw_payload)
+            return verify_permit2(self._signer, payload, requirements, permit2_payload, context)
+
+        evm_payload = ExactEIP3009Payload.from_dict(raw_payload)
         payer = evm_payload.authorization.from_address
         network = str(requirements.network)
 
@@ -257,6 +271,11 @@ def settle(
             SettleResponse with success, transaction, and payer.
         """
         # First verify
+        raw_payload = payload.payload or {}
+        if is_permit2_payload(raw_payload):
+            permit2_payload = ExactPermit2Payload.from_dict(raw_payload)
+            return settle_permit2(self._signer, payload, requirements, permit2_payload, context)
+
         verify_result = self.verify(payload, requirements, context)
         if not verify_result.is_valid:
             return SettleResponse(
diff --git a/python/x402/src/bankofai/x402/mechanisms/evm/exact/permit2.py b/python/x402/src/bankofai/x402/mechanisms/evm/exact/permit2.py
new file mode 100644
index 00000000..dd1719c6
--- /dev/null
+++ b/python/x402/src/bankofai/x402/mechanisms/evm/exact/permit2.py
@@ -0,0 +1,698 @@
+"""EVM Permit2 client + facilitator logic for the Exact payment scheme."""
+
+from __future__ import annotations
+
+import time
+from typing import Any
+
+from eth_account import Account
+from eth_account.typed_transactions import TypedTransaction
+from hexbytes import HexBytes
+
+from ....extensions.eip2612_gas_sponsoring import (
+    extract_eip2612_gas_sponsoring_info,
+    validate_eip2612_gas_sponsoring_info,
+)
+from ....extensions.erc20_approval_gas_sponsoring import (
+    ERC20_APPROVAL_GAS_SPONSORING,
+    Erc20ApprovalGasSponsoringExtension,
+    extract_erc20_approval_gas_sponsoring_info,
+    validate_erc20_approval_gas_sponsoring_info,
+)
+from ....interfaces import FacilitatorContext
+from ....schemas import PaymentPayload, PaymentRequirements, SettleResponse, VerifyResponse
+from ..constants import (
+    BALANCE_OF_ABI,
+    ERC20_ALLOWANCE_ABI,
+    ERR_EIP2612_ASSET_MISMATCH,
+    ERR_EIP2612_DEADLINE_EXPIRED,
+    ERR_EIP2612_EXTENSION_FORMAT,
+    ERR_EIP2612_FROM_MISMATCH,
+    ERR_EIP2612_SPENDER_NOT_PERMIT2,
+    ERR_ERC20_APPROVAL_ASSET_MISMATCH,
+    ERR_ERC20_APPROVAL_EXTENSION_FORMAT,
+    ERR_ERC20_APPROVAL_FROM_MISMATCH,
+    ERR_ERC20_APPROVAL_SPENDER_NOT_PERMIT2,
+    ERR_ERC20_APPROVAL_TX_FAILED,
+    ERR_ERC20_APPROVAL_TX_INVALID_CALLDATA,
+    ERR_ERC20_APPROVAL_TX_INVALID_SIGNATURE,
+    ERR_ERC20_APPROVAL_TX_PARSE_FAILED,
+    ERR_ERC20_APPROVAL_TX_SIGNER_MISMATCH,
+    ERR_ERC20_APPROVAL_TX_WRONG_SELECTOR,
+    ERR_ERC20_APPROVAL_TX_WRONG_SPENDER,
+    ERR_ERC20_APPROVAL_TX_WRONG_TARGET,
+    ERR_NETWORK_MISMATCH,
+    ERR_PERMIT2_2612_AMOUNT_MISMATCH,
+    ERR_PERMIT2_ALLOWANCE_REQUIRED,
+    ERR_PERMIT2_AMOUNT_MISMATCH,
+    ERR_PERMIT2_DEADLINE_EXPIRED,
+    ERR_PERMIT2_INVALID_AMOUNT,
+    ERR_PERMIT2_INVALID_DESTINATION,
+    ERR_PERMIT2_INVALID_FACILITATOR,
+    ERR_PERMIT2_INVALID_NONCE,
+    ERR_PERMIT2_INVALID_OWNER,
+    ERR_PERMIT2_INVALID_SIGNATURE,
+    ERR_PERMIT2_INVALID_SPENDER,
+    ERR_PERMIT2_NOT_YET_VALID,
+    ERR_PERMIT2_PAYMENT_TOO_EARLY,
+    ERR_PERMIT2_RECIPIENT_MISMATCH,
+    ERR_PERMIT2_TOKEN_MISMATCH,
+    ERR_TRANSACTION_FAILED,
+    ERR_UNSUPPORTED_SCHEME,
+    PERMIT2_WITNESS_TYPES,
+    get_permit2_address,
+    get_x402_exact_permit2_proxy_address,
+    x402ExactPermit2ProxyABI,
+)
+from ..signer import ClientEvmSigner, FacilitatorEvmSigner
+from ..types import (
+    ExactPermit2Payload,
+    Permit2Authorization,
+    Permit2Witness,
+    TypedDataDomain,
+    TypedDataField,
+)
+from ..utils import create_permit2_nonce, get_evm_chain_id, hex_to_bytes, normalize_address
+
+
+def create_permit2_payload(
+    signer: ClientEvmSigner,
+    requirements: PaymentRequirements,
+) -> dict[str, Any]:
+    """Create signed Permit2 payload (inner payload only)."""
+    now = int(time.time())
+    nonce = create_permit2_nonce()
+
+    valid_after = str(now - 600)
+    deadline = str(now + (requirements.max_timeout_seconds or 3600))
+
+    facilitator = (requirements.extra or {}).get("permit2FacilitatorAddress")
+    if not facilitator:
+        raise ValueError("Permit2 facilitator address required in payment requirements extra")
+
+    authorization = Permit2Authorization(
+        from_address=normalize_address(signer.address),
+        permitted_token=normalize_address(requirements.asset),
+        permitted_amount=requirements.amount,
+        spender=normalize_address(get_x402_exact_permit2_proxy_address(str(requirements.network))),
+        nonce=nonce,
+        deadline=deadline,
+        witness=Permit2Witness(
+            to=normalize_address(requirements.pay_to),
+            facilitator=normalize_address(str(facilitator)),
+            valid_after=valid_after,
+        ),
+    )
+
+    signature = _sign_permit2_authorization(signer, authorization, requirements)
+    payload = ExactPermit2Payload(permit2_authorization=authorization, signature=signature)
+    return payload.to_dict()
+
+
+def verify_permit2(
+    signer: FacilitatorEvmSigner,
+    payload: PaymentPayload,
+    requirements: PaymentRequirements,
+    permit2_payload: ExactPermit2Payload,
+    context: FacilitatorContext | None = None,
+) -> VerifyResponse:
+    """Verify a Permit2 payment payload on EVM."""
+    payer = permit2_payload.permit2_authorization.from_address
+
+    if payload.accepted.scheme != "exact" or requirements.scheme != "exact":
+        return VerifyResponse(is_valid=False, invalid_reason=ERR_UNSUPPORTED_SCHEME, payer=payer)
+
+    if payload.accepted.network != requirements.network:
+        return VerifyResponse(is_valid=False, invalid_reason=ERR_NETWORK_MISMATCH, payer=payer)
+
+    network = str(requirements.network)
+    token_address = normalize_address(requirements.asset)
+    permit2_address = normalize_address(get_permit2_address(network))
+    proxy_address = normalize_address(get_x402_exact_permit2_proxy_address(network))
+
+    if normalize_address(permit2_payload.permit2_authorization.spender) != proxy_address:
+        return VerifyResponse(
+            is_valid=False, invalid_reason=ERR_PERMIT2_INVALID_SPENDER, payer=payer
+        )
+
+    if normalize_address(permit2_payload.permit2_authorization.witness.to) != normalize_address(
+        requirements.pay_to
+    ):
+        return VerifyResponse(
+            is_valid=False, invalid_reason=ERR_PERMIT2_RECIPIENT_MISMATCH, payer=payer
+        )
+
+    expected_facilitator = (requirements.extra or {}).get("permit2FacilitatorAddress")
+    if not expected_facilitator:
+        return VerifyResponse(
+            is_valid=False, invalid_reason=ERR_PERMIT2_INVALID_FACILITATOR, payer=payer
+        )
+    if normalize_address(
+        permit2_payload.permit2_authorization.witness.facilitator
+    ) != normalize_address(str(expected_facilitator)):
+        return VerifyResponse(
+            is_valid=False, invalid_reason=ERR_PERMIT2_INVALID_FACILITATOR, payer=payer
+        )
+
+    now = int(time.time())
+    if int(permit2_payload.permit2_authorization.deadline) < now + 6:
+        return VerifyResponse(
+            is_valid=False, invalid_reason=ERR_PERMIT2_DEADLINE_EXPIRED, payer=payer
+        )
+
+    if int(permit2_payload.permit2_authorization.witness.valid_after) > now:
+        return VerifyResponse(is_valid=False, invalid_reason=ERR_PERMIT2_NOT_YET_VALID, payer=payer)
+
+    if int(permit2_payload.permit2_authorization.permitted_amount) != int(requirements.amount):
+        return VerifyResponse(
+            is_valid=False, invalid_reason=ERR_PERMIT2_AMOUNT_MISMATCH, payer=payer
+        )
+
+    if normalize_address(permit2_payload.permit2_authorization.permitted_token) != token_address:
+        return VerifyResponse(
+            is_valid=False, invalid_reason=ERR_PERMIT2_TOKEN_MISMATCH, payer=payer
+        )
+
+    typed_fields: dict[str, list[TypedDataField]] = {}
+    for type_name, fields in PERMIT2_WITNESS_TYPES.items():
+        typed_fields[type_name] = [TypedDataField(name=f["name"], type=f["type"]) for f in fields]
+
+    chain_id = get_evm_chain_id(network)
+    domain = TypedDataDomain(
+        name="Permit2", version=None, chain_id=chain_id, verifying_contract=permit2_address
+    )
+    message = {
+        "permitted": {
+            "token": normalize_address(permit2_payload.permit2_authorization.permitted_token),
+            "amount": int(permit2_payload.permit2_authorization.permitted_amount),
+        },
+        "spender": normalize_address(permit2_payload.permit2_authorization.spender),
+        "nonce": int(permit2_payload.permit2_authorization.nonce),
+        "deadline": int(permit2_payload.permit2_authorization.deadline),
+        "witness": {
+            "to": normalize_address(permit2_payload.permit2_authorization.witness.to),
+            "facilitator": normalize_address(
+                permit2_payload.permit2_authorization.witness.facilitator
+            ),
+            "validAfter": int(permit2_payload.permit2_authorization.witness.valid_after),
+        },
+    }
+
+    try:
+        is_valid = signer.verify_typed_data(
+            address=payer,
+            domain=domain,
+            types=typed_fields,
+            primary_type="PermitWitnessTransferFrom",
+            message=message,
+            signature=hex_to_bytes(permit2_payload.signature),
+        )
+        if not is_valid:
+            return VerifyResponse(
+                is_valid=False, invalid_reason=ERR_PERMIT2_INVALID_SIGNATURE, payer=payer
+            )
+    except Exception:
+        return VerifyResponse(
+            is_valid=False, invalid_reason=ERR_PERMIT2_INVALID_SIGNATURE, payer=payer
+        )
+
+    # Check allowance (best-effort)
+    try:
+        allowance = signer.read_contract(
+            token_address, ERC20_ALLOWANCE_ABI, "allowance", payer, permit2_address
+        )
+        if int(allowance) < int(requirements.amount):
+            has_extension, extension_error = _verify_gas_sponsoring_extensions(
+                payload, requirements, payer, permit2_address, context
+            )
+            if extension_error is not None:
+                return extension_error
+            if not has_extension:
+                return VerifyResponse(
+                    is_valid=False, invalid_reason=ERR_PERMIT2_ALLOWANCE_REQUIRED, payer=payer
+                )
+    except Exception:
+        has_extension, extension_error = _verify_gas_sponsoring_extensions(
+            payload, requirements, payer, permit2_address, context
+        )
+        if extension_error is not None:
+            return extension_error
+        if not has_extension:
+            return VerifyResponse(
+                is_valid=False, invalid_reason=ERR_PERMIT2_ALLOWANCE_REQUIRED, payer=payer
+            )
+
+    # Check balance (best-effort)
+    try:
+        balance = signer.read_contract(token_address, BALANCE_OF_ABI, "balanceOf", payer)
+        if int(balance) < int(requirements.amount):
+            return VerifyResponse(
+                is_valid=False,
+                invalid_reason="insufficient_funds",
+                invalid_message=(
+                    f"Insufficient funds. Required: {requirements.amount}, Available: {balance}"
+                ),
+                payer=payer,
+            )
+    except Exception:
+        pass
+
+    return VerifyResponse(is_valid=True, payer=payer)
+
+
+def settle_permit2(
+    signer: FacilitatorEvmSigner,
+    payload: PaymentPayload,
+    requirements: PaymentRequirements,
+    permit2_payload: ExactPermit2Payload,
+    context: FacilitatorContext | None = None,
+) -> SettleResponse:
+    """Settle a Permit2 payment on-chain."""
+    payer = permit2_payload.permit2_authorization.from_address
+    verify_result = verify_permit2(signer, payload, requirements, permit2_payload, context)
+    if not verify_result.is_valid:
+        return SettleResponse(
+            success=False,
+            error_reason=verify_result.invalid_reason or ERR_UNSUPPORTED_SCHEME,
+            transaction="",
+            network=str(requirements.network),
+            payer=payer,
+        )
+
+    proxy_address = get_x402_exact_permit2_proxy_address(str(requirements.network))
+
+    eip2612_info = extract_eip2612_gas_sponsoring_info(payload.extensions)
+    if eip2612_info and validate_eip2612_gas_sponsoring_info(eip2612_info):
+        return _settle_with_eip2612(signer, payload, permit2_payload, eip2612_info)
+
+    erc20_info = extract_erc20_approval_gas_sponsoring_info(payload.extensions)
+    if (
+        erc20_info
+        and validate_erc20_approval_gas_sponsoring_info(erc20_info)
+        and context is not None
+    ):
+        extension = context.get_extension(ERC20_APPROVAL_GAS_SPONSORING.key)
+        if isinstance(extension, Erc20ApprovalGasSponsoringExtension) and extension.signer:
+            return _settle_with_erc20_approval(
+                extension.signer, payload, permit2_payload, erc20_info
+            )
+    try:
+        tx = signer.write_contract(
+            proxy_address,
+            x402ExactPermit2ProxyABI,
+            "settle",
+            {
+                "permitted": {
+                    "token": normalize_address(
+                        permit2_payload.permit2_authorization.permitted_token
+                    ),
+                    "amount": int(permit2_payload.permit2_authorization.permitted_amount),
+                },
+                "nonce": int(permit2_payload.permit2_authorization.nonce),
+                "deadline": int(permit2_payload.permit2_authorization.deadline),
+            },
+            normalize_address(payer),
+            {
+                "to": normalize_address(permit2_payload.permit2_authorization.witness.to),
+                "facilitator": normalize_address(
+                    permit2_payload.permit2_authorization.witness.facilitator
+                ),
+                "validAfter": int(permit2_payload.permit2_authorization.witness.valid_after),
+            },
+            hex_to_bytes(permit2_payload.signature),
+        )
+
+        receipt = signer.wait_for_transaction_receipt(tx)
+        if receipt.status != 1:
+            return SettleResponse(
+                success=False,
+                error_reason="invalid_transaction_state",
+                transaction=tx,
+                network=str(requirements.network),
+                payer=payer,
+            )
+
+        return SettleResponse(
+            success=True,
+            transaction=tx,
+            network=str(requirements.network),
+            payer=payer,
+        )
+    except Exception as e:
+        error_reason = _map_settle_error(str(e))
+        return SettleResponse(
+            success=False,
+            error_reason=error_reason,
+            error_message=str(e),
+            transaction="",
+            network=str(requirements.network),
+            payer=payer,
+        )
+
+
+def _sign_permit2_authorization(
+    signer: ClientEvmSigner,
+    authorization: Permit2Authorization,
+    requirements: PaymentRequirements,
+) -> str:
+    chain_id = get_evm_chain_id(str(requirements.network))
+    permit2_address = normalize_address(get_permit2_address(str(requirements.network)))
+
+    domain = TypedDataDomain(
+        name="Permit2", version=None, chain_id=chain_id, verifying_contract=permit2_address
+    )
+    types = PERMIT2_WITNESS_TYPES
+    message = {
+        "permitted": {
+            "token": normalize_address(authorization.permitted_token),
+            "amount": int(authorization.permitted_amount),
+        },
+        "spender": normalize_address(authorization.spender),
+        "nonce": int(authorization.nonce),
+        "deadline": int(authorization.deadline),
+        "witness": {
+            "to": normalize_address(authorization.witness.to),
+            "facilitator": normalize_address(authorization.witness.facilitator),
+            "validAfter": int(authorization.witness.valid_after),
+        },
+    }
+
+    typed_fields: dict[str, list[TypedDataField]] = {}
+    for type_name, fields in types.items():
+        typed_fields[type_name] = [TypedDataField(name=f["name"], type=f["type"]) for f in fields]
+
+    sig_bytes = signer.sign_typed_data(
+        domain=domain,
+        types=typed_fields,
+        primary_type="PermitWitnessTransferFrom",
+        message=message,
+    )
+    return "0x" + sig_bytes.hex()
+
+
+def _verify_gas_sponsoring_extensions(
+    payload: PaymentPayload,
+    requirements: PaymentRequirements,
+    payer: str,
+    permit2_address: str,
+    context: FacilitatorContext | None,
+) -> tuple[bool, VerifyResponse | None]:
+    eip2612_info = extract_eip2612_gas_sponsoring_info(payload.extensions)
+    if eip2612_info:
+        if not validate_eip2612_gas_sponsoring_info(eip2612_info):
+            return True, VerifyResponse(
+                is_valid=False, invalid_reason=ERR_EIP2612_EXTENSION_FORMAT, payer=payer
+            )
+        if normalize_address(eip2612_info.from_address) != normalize_address(payer):
+            return True, VerifyResponse(
+                is_valid=False, invalid_reason=ERR_EIP2612_FROM_MISMATCH, payer=payer
+            )
+        if normalize_address(eip2612_info.asset) != normalize_address(requirements.asset):
+            return True, VerifyResponse(
+                is_valid=False, invalid_reason=ERR_EIP2612_ASSET_MISMATCH, payer=payer
+            )
+        if normalize_address(eip2612_info.spender) != normalize_address(permit2_address):
+            return True, VerifyResponse(
+                is_valid=False,
+                invalid_reason=ERR_EIP2612_SPENDER_NOT_PERMIT2,
+                payer=payer,
+            )
+        now = int(time.time())
+        if int(eip2612_info.deadline) < now + 6:
+            return True, VerifyResponse(
+                is_valid=False, invalid_reason=ERR_EIP2612_DEADLINE_EXPIRED, payer=payer
+            )
+        return True, None
+
+    erc20_info = extract_erc20_approval_gas_sponsoring_info(payload.extensions)
+    if not erc20_info:
+        return False, None
+
+    if context is None or context.get_extension(ERC20_APPROVAL_GAS_SPONSORING.key) is None:
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_PERMIT2_ALLOWANCE_REQUIRED, payer=payer
+        )
+
+    if not validate_erc20_approval_gas_sponsoring_info(erc20_info):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_ERC20_APPROVAL_EXTENSION_FORMAT, payer=payer
+        )
+    if normalize_address(erc20_info.from_address) != normalize_address(payer):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_ERC20_APPROVAL_FROM_MISMATCH, payer=payer
+        )
+    if normalize_address(erc20_info.asset) != normalize_address(requirements.asset):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_ERC20_APPROVAL_ASSET_MISMATCH, payer=payer
+        )
+    if normalize_address(erc20_info.spender) != normalize_address(permit2_address):
+        return True, VerifyResponse(
+            is_valid=False,
+            invalid_reason=ERR_ERC20_APPROVAL_SPENDER_NOT_PERMIT2,
+            payer=payer,
+        )
+
+    tx_info = _parse_erc20_approval_signed_transaction(erc20_info.signed_transaction)
+    if tx_info is None:
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_ERC20_APPROVAL_TX_PARSE_FAILED, payer=payer
+        )
+
+    tx_to = tx_info.get("to")
+    if not tx_to or normalize_address(tx_to) != normalize_address(requirements.asset):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_ERC20_APPROVAL_TX_WRONG_TARGET, payer=payer
+        )
+
+    tx_data = str(tx_info.get("data", "")).lower()
+    if not tx_data.startswith("0x095ea7b3"):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_ERC20_APPROVAL_TX_WRONG_SELECTOR, payer=payer
+        )
+
+    decoded_spender = _decode_erc20_approval_spender(tx_data)
+    if decoded_spender is None:
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_ERC20_APPROVAL_TX_INVALID_CALLDATA, payer=payer
+        )
+    if normalize_address(decoded_spender) != normalize_address(permit2_address):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_ERC20_APPROVAL_TX_WRONG_SPENDER, payer=payer
+        )
+
+    recovered = _recover_erc20_approval_signer(erc20_info.signed_transaction)
+    if recovered is None:
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_ERC20_APPROVAL_TX_INVALID_SIGNATURE, payer=payer
+        )
+    if normalize_address(recovered) != normalize_address(payer):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_ERC20_APPROVAL_TX_SIGNER_MISMATCH, payer=payer
+        )
+    return True, None
+
+
+def _settle_with_eip2612(
+    signer: FacilitatorEvmSigner,
+    payload: PaymentPayload,
+    permit2_payload: ExactPermit2Payload,
+    info: Any,
+) -> SettleResponse:
+    payer = permit2_payload.permit2_authorization.from_address
+    proxy_address = get_x402_exact_permit2_proxy_address(str(payload.accepted.network))
+    try:
+        v, r, s = _split_eip2612_signature(str(info.signature))
+        tx = signer.write_contract(
+            proxy_address,
+            x402ExactPermit2ProxyABI,
+            "settleWithPermit",
+            {
+                "value": int(info.amount),
+                "deadline": int(info.deadline),
+                "r": r,
+                "s": s,
+                "v": v,
+            },
+            {
+                "permitted": {
+                    "token": normalize_address(
+                        permit2_payload.permit2_authorization.permitted_token
+                    ),
+                    "amount": int(permit2_payload.permit2_authorization.permitted_amount),
+                },
+                "nonce": int(permit2_payload.permit2_authorization.nonce),
+                "deadline": int(permit2_payload.permit2_authorization.deadline),
+            },
+            normalize_address(payer),
+            {
+                "to": normalize_address(permit2_payload.permit2_authorization.witness.to),
+                "facilitator": normalize_address(
+                    permit2_payload.permit2_authorization.witness.facilitator
+                ),
+                "validAfter": int(permit2_payload.permit2_authorization.witness.valid_after),
+            },
+            hex_to_bytes(permit2_payload.signature),
+        )
+        receipt = signer.wait_for_transaction_receipt(tx)
+        if receipt.status != 1:
+            return SettleResponse(
+                success=False,
+                error_reason="invalid_transaction_state",
+                transaction=tx,
+                network=str(payload.accepted.network),
+                payer=payer,
+            )
+        return SettleResponse(
+            success=True,
+            transaction=tx,
+            network=str(payload.accepted.network),
+            payer=payer,
+        )
+    except Exception as e:
+        return SettleResponse(
+            success=False,
+            error_reason=_map_settle_error(str(e)),
+            error_message=str(e),
+            transaction="",
+            network=str(payload.accepted.network),
+            payer=payer,
+        )
+
+
+def _settle_with_erc20_approval(
+    signer: Any,
+    payload: PaymentPayload,
+    permit2_payload: ExactPermit2Payload,
+    info: Any,
+) -> SettleResponse:
+    payer = permit2_payload.permit2_authorization.from_address
+    proxy_address = get_x402_exact_permit2_proxy_address(str(payload.accepted.network))
+    try:
+        tx_hash = signer.send_raw_transaction(info.signed_transaction)
+        receipt = signer.wait_for_transaction_receipt(tx_hash)
+        if receipt.status != 1:
+            return SettleResponse(
+                success=False,
+                error_reason=ERR_ERC20_APPROVAL_TX_FAILED,
+                transaction=tx_hash,
+                network=str(payload.accepted.network),
+                payer=payer,
+            )
+
+        tx = signer.write_contract(
+            proxy_address,
+            x402ExactPermit2ProxyABI,
+            "settle",
+            {
+                "permitted": {
+                    "token": normalize_address(
+                        permit2_payload.permit2_authorization.permitted_token
+                    ),
+                    "amount": int(permit2_payload.permit2_authorization.permitted_amount),
+                },
+                "nonce": int(permit2_payload.permit2_authorization.nonce),
+                "deadline": int(permit2_payload.permit2_authorization.deadline),
+            },
+            normalize_address(payer),
+            {
+                "to": normalize_address(permit2_payload.permit2_authorization.witness.to),
+                "facilitator": normalize_address(
+                    permit2_payload.permit2_authorization.witness.facilitator
+                ),
+                "validAfter": int(permit2_payload.permit2_authorization.witness.valid_after),
+            },
+            hex_to_bytes(permit2_payload.signature),
+        )
+        settle_receipt = signer.wait_for_transaction_receipt(tx)
+        if settle_receipt.status != 1:
+            return SettleResponse(
+                success=False,
+                error_reason="invalid_transaction_state",
+                transaction=tx,
+                network=str(payload.accepted.network),
+                payer=payer,
+            )
+        return SettleResponse(
+            success=True,
+            transaction=tx,
+            network=str(payload.accepted.network),
+            payer=payer,
+        )
+    except Exception as e:
+        return SettleResponse(
+            success=False,
+            error_reason=_map_settle_error(str(e)),
+            error_message=str(e),
+            transaction="",
+            network=str(payload.accepted.network),
+            payer=payer,
+        )
+
+
+def _split_eip2612_signature(signature: str) -> tuple[int, str, str]:
+    sig = signature.removeprefix("0x")
+    if len(sig) != 130:
+        raise ValueError("invalid EIP-2612 signature length")
+    r = "0x" + sig[:64]
+    s = "0x" + sig[64:128]
+    v = int(sig[128:130], 16)
+    return v, r, s
+
+
+def _map_settle_error(message: str) -> str:
+    if "Permit2612AmountMismatch" in message:
+        return ERR_PERMIT2_2612_AMOUNT_MISMATCH
+    if "InvalidAmount" in message:
+        return ERR_PERMIT2_INVALID_AMOUNT
+    if "InvalidDestination" in message:
+        return ERR_PERMIT2_INVALID_DESTINATION
+    if "InvalidOwner" in message:
+        return ERR_PERMIT2_INVALID_OWNER
+    if "PaymentTooEarly" in message:
+        return ERR_PERMIT2_PAYMENT_TOO_EARLY
+    if "InvalidNonce" in message:
+        return ERR_PERMIT2_INVALID_NONCE
+    if "InvalidSignature" in message or "SignatureExpired" in message:
+        return ERR_PERMIT2_INVALID_SIGNATURE
+    return ERR_TRANSACTION_FAILED
+
+
+def _parse_erc20_approval_signed_transaction(signed_tx: str) -> dict[str, str] | None:
+    try:
+        parsed = TypedTransaction.from_bytes(HexBytes(signed_tx))
+        tx = parsed.as_dict()
+        to_val = tx.get("to")
+        data_val = tx.get("data")
+
+        to_hex: str | None = None
+        if isinstance(to_val, (bytes, bytearray)):
+            to_hex = "0x" + bytes(to_val).hex()
+        elif isinstance(to_val, str):
+            to_hex = to_val
+
+        data_hex: str | None = None
+        if isinstance(data_val, (bytes, bytearray)):
+            data_hex = "0x" + bytes(data_val).hex()
+        elif isinstance(data_val, str):
+            data_hex = data_val
+
+        if not to_hex or data_hex is None:
+            return None
+        return {"to": to_hex, "data": data_hex}
+    except Exception:
+        return None
+
+
+def _decode_erc20_approval_spender(data_hex: str) -> str | None:
+    cleaned = data_hex.removeprefix("0x")
+    if not cleaned.startswith("095ea7b3") or len(cleaned) < 8 + 64 + 64:
+        return None
+    spender_word = cleaned[8 : 8 + 64]
+    return "0x" + spender_word[24:].lower()
+
+
+def _recover_erc20_approval_signer(signed_tx: str) -> str | None:
+    try:
+        return str(Account.recover_transaction(HexBytes(signed_tx)))
+    except Exception:
+        return None
diff --git a/python/x402/src/bankofai/x402/mechanisms/evm/exact/v1/client.py b/python/x402/src/bankofai/x402/mechanisms/evm/exact/v1/client.py
index 26a771d6..3a5e9f8a 100644
--- a/python/x402/src/bankofai/x402/mechanisms/evm/exact/v1/client.py
+++ b/python/x402/src/bankofai/x402/mechanisms/evm/exact/v1/client.py
@@ -46,6 +46,7 @@ def __init__(self, signer: ClientEvmSigner):
     def create_payment_payload(
         self,
         requirements: PaymentRequirementsV1,
+        context=None,
     ) -> dict[str, Any]:
         """Create signed EIP-3009 inner payload (V1 format).
 
diff --git a/python/x402/src/bankofai/x402/mechanisms/evm/signers.py b/python/x402/src/bankofai/x402/mechanisms/evm/signers.py
index eec1bde9..d6a77a93 100644
--- a/python/x402/src/bankofai/x402/mechanisms/evm/signers.py
+++ b/python/x402/src/bankofai/x402/mechanisms/evm/signers.py
@@ -21,6 +21,7 @@
 
 from .constants import EIP1271_MAGIC_VALUE, IS_VALID_SIGNATURE_ABI, TX_STATUS_SUCCESS
 from .types import TransactionReceipt, TypedDataDomain, TypedDataField
+from .utils import resolve_evm_rpc_url
 
 # ERC20 ABI for balance checks
 _ERC20_BALANCE_ABI = [
@@ -61,14 +62,25 @@ class EthAccountSigner:
         account: eth_account LocalAccount instance.
     """
 
-    def __init__(self, account: LocalAccount) -> None:
+    def __init__(
+        self,
+        account: LocalAccount,
+        rpc_url: str | None = None,
+        network: str | None = None,
+    ) -> None:
         """Initialize signer with eth_account LocalAccount.
 
         Args:
             account: eth_account LocalAccount instance (from Account.from_key,
                 Account.from_mnemonic, etc.).
+            rpc_url: Optional Ethereum RPC endpoint for nonce + gas data.
+            network: Optional CAIP-2 network (e.g., eip155:84532) used to
+                resolve chain-specific default RPC URL when rpc_url is not set.
         """
         self._account = account
+        if rpc_url is None:
+            rpc_url = resolve_evm_rpc_url(network)
+        self._w3 = Web3(Web3.HTTPProvider(rpc_url)) if rpc_url else None
 
     @property
     def address(self) -> str:
@@ -110,10 +122,11 @@ def sign_typed_data(
         if isinstance(domain, TypedDataDomain):
             domain_dict = {
                 "name": domain.name,
-                "version": domain.version,
                 "chainId": domain.chain_id,
                 "verifyingContract": domain.verifying_contract,
             }
+            if domain.version:
+                domain_dict["version"] = domain.version
         else:
             domain_dict = domain
 
@@ -125,6 +138,46 @@ def sign_typed_data(
         )
         return bytes(signed.signature)
 
+    def get_transaction_count(self, address: str) -> int:
+        """Get transaction count (nonce) for address."""
+        if not self._w3:
+            raise ValueError("RPC URL required for get_transaction_count")
+        return int(self._w3.eth.get_transaction_count(Web3.to_checksum_address(address)))
+
+    def get_gas_price(self) -> int:
+        """Get current gas price for legacy transactions."""
+        if not self._w3:
+            raise ValueError("RPC URL required for get_gas_price")
+        return int(self._w3.eth.gas_price)
+
+    def estimate_fees_per_gas(self) -> tuple[int, int] | None:
+        """Estimate EIP-1559 fees (maxFeePerGas, maxPriorityFeePerGas).
+
+        Returns None if the connected network does not expose baseFeePerGas.
+        """
+        if not self._w3:
+            raise ValueError("RPC URL required for estimate_fees_per_gas")
+        try:
+            block = self._w3.eth.get_block("pending")
+            base_fee = block.get("baseFeePerGas")
+            if base_fee is None:
+                return None
+            max_priority_fee = int(self._w3.eth.max_priority_fee)
+            max_fee = int(base_fee) * 2 + max_priority_fee
+            return max_fee, max_priority_fee
+        except Exception:
+            return None
+
+    def sign_transaction(self, tx: dict[str, Any]) -> bytes:
+        """Sign an EIP-1559 transaction dict and return raw bytes."""
+        signed = self._account.sign_transaction(tx)
+        raw = getattr(signed, "rawTransaction", None)
+        if raw is None:
+            raw = getattr(signed, "raw_transaction", None)
+        if raw is None:
+            raise AttributeError("SignedTransaction missing raw transaction bytes")
+        return raw if isinstance(raw, (bytes, bytearray)) else bytes(raw)
+
 
 class FacilitatorWeb3Signer:
     """Facilitator-side EVM signer using web3.py.
@@ -249,14 +302,15 @@ def verify_typed_data(
             True if signature is valid.
         """
         # Build full types including EIP712Domain
-        full_types: dict[str, list[dict[str, str]]] = {
-            "EIP712Domain": [
-                {"name": "name", "type": "string"},
-                {"name": "version", "type": "string"},
-                {"name": "chainId", "type": "uint256"},
-                {"name": "verifyingContract", "type": "address"},
-            ]
-        }
+        domain_fields = [
+            {"name": "name", "type": "string"},
+            {"name": "chainId", "type": "uint256"},
+            {"name": "verifyingContract", "type": "address"},
+        ]
+        if domain.version:
+            domain_fields.insert(1, {"name": "version", "type": "string"})
+
+        full_types: dict[str, list[dict[str, str]]] = {"EIP712Domain": domain_fields}
         for type_name, fields in types.items():
             full_types[type_name] = [
                 {"name": f.name, "type": f.type} if isinstance(f, TypedDataField) else f
@@ -269,15 +323,18 @@ def verify_typed_data(
             msg_copy["nonce"] = "0x" + msg_copy["nonce"].hex()
 
         try:
+            domain_dict = {
+                "name": domain.name,
+                "chainId": domain.chain_id,
+                "verifyingContract": domain.verifying_contract,
+            }
+            if domain.version:
+                domain_dict["version"] = domain.version
+
             typed_data = {
                 "types": full_types,
                 "primaryType": primary_type,
-                "domain": {
-                    "name": domain.name,
-                    "version": domain.version,
-                    "chainId": domain.chain_id,
-                    "verifyingContract": domain.verifying_contract,
-                },
+                "domain": domain_dict,
                 "message": msg_copy,
             }
 
diff --git a/python/x402/src/bankofai/x402/mechanisms/evm/types.py b/python/x402/src/bankofai/x402/mechanisms/evm/types.py
index e6d18f55..2c5e832c 100644
--- a/python/x402/src/bankofai/x402/mechanisms/evm/types.py
+++ b/python/x402/src/bankofai/x402/mechanisms/evm/types.py
@@ -67,9 +67,88 @@ def from_dict(cls, data: dict[str, Any]) -> "ExactEIP3009Payload":
         )
 
 
+@dataclass
+class Permit2Witness:
+    """Permit2 witness data structure."""
+
+    to: str
+    facilitator: str
+    valid_after: str
+
+
+@dataclass
+class Permit2Authorization:
+    """Permit2 authorization parameters."""
+
+    from_address: str
+    permitted_token: str
+    permitted_amount: str
+    spender: str
+    nonce: str
+    deadline: str
+    witness: Permit2Witness
+
+
+@dataclass
+class ExactPermit2Payload:
+    """Permit2 payload for tokens using the Permit2 + x402Permit2Proxy flow."""
+
+    permit2_authorization: Permit2Authorization
+    signature: str
+
+    def to_dict(self) -> dict[str, Any]:
+        """Convert to dictionary for JSON serialization."""
+        return {
+            "signature": self.signature,
+            "permit2Authorization": {
+                "from": self.permit2_authorization.from_address,
+                "permitted": {
+                    "token": self.permit2_authorization.permitted_token,
+                    "amount": self.permit2_authorization.permitted_amount,
+                },
+                "spender": self.permit2_authorization.spender,
+                "nonce": self.permit2_authorization.nonce,
+                "deadline": self.permit2_authorization.deadline,
+                "witness": {
+                    "to": self.permit2_authorization.witness.to,
+                    "facilitator": self.permit2_authorization.witness.facilitator,
+                    "validAfter": self.permit2_authorization.witness.valid_after,
+                },
+            },
+        }
+
+    @classmethod
+    def from_dict(cls, data: dict[str, Any]) -> "ExactPermit2Payload":
+        """Create from dictionary."""
+        auth = data.get("permit2Authorization", {})
+        permitted = auth.get("permitted", {})
+        witness = auth.get("witness", {})
+        return cls(
+            permit2_authorization=Permit2Authorization(
+                from_address=auth.get("from", ""),
+                permitted_token=permitted.get("token", ""),
+                permitted_amount=permitted.get("amount", ""),
+                spender=auth.get("spender", ""),
+                nonce=auth.get("nonce", ""),
+                deadline=auth.get("deadline", ""),
+                witness=Permit2Witness(
+                    to=witness.get("to", ""),
+                    facilitator=witness.get("facilitator", ""),
+                    valid_after=witness.get("validAfter", ""),
+                ),
+            ),
+            signature=data.get("signature", ""),
+        )
+
+
 # Type aliases for V1/V2 compatibility
 ExactEvmPayloadV1 = ExactEIP3009Payload
-ExactEvmPayloadV2 = ExactEIP3009Payload
+ExactEvmPayloadV2 = ExactEIP3009Payload | ExactPermit2Payload
+
+
+def is_permit2_payload(data: dict[str, Any]) -> bool:
+    """Return True if raw payload dict is a Permit2 payload."""
+    return "permit2Authorization" in data
 
 
 @dataclass
@@ -77,7 +156,7 @@ class TypedDataDomain:
     """EIP-712 domain separator."""
 
     name: str
-    version: str
+    version: str | None
     chain_id: int
     verifying_contract: str
 
diff --git a/python/x402/src/bankofai/x402/mechanisms/evm/utils.py b/python/x402/src/bankofai/x402/mechanisms/evm/utils.py
index 223ca528..7752add7 100644
--- a/python/x402/src/bankofai/x402/mechanisms/evm/utils.py
+++ b/python/x402/src/bankofai/x402/mechanisms/evm/utils.py
@@ -94,6 +94,45 @@ def get_asset_info(network: str, asset_address: str) -> AssetInfo:
     raise ValueError(f"Token {asset_address} is not a registered asset for network {network}.")
 
 
+def resolve_evm_rpc_url(
+    network: str | None,
+    explicit_rpc_url: str | None = None,
+) -> str | None:
+    """Resolve RPC URL for an EVM network with deterministic precedence.
+
+    Precedence:
+    1. explicit_rpc_url argument
+    2. EVM_RPC_URL_<CHAIN_ID> (for e.g., EVM_RPC_URL_97)
+    3. EVM_RPC_URL / WEB3_PROVIDER_URL
+    4. network config default_rpc_url
+    5. None
+    """
+    if explicit_rpc_url:
+        return explicit_rpc_url
+
+    chain_id: str | None = None
+    if network and network.startswith("eip155:"):
+        parts = network.split(":", 1)
+        if len(parts) == 2 and parts[1].isdigit():
+            chain_id = parts[1]
+
+    if chain_id:
+        chain_specific = os.environ.get(f"EVM_RPC_URL_{chain_id}")
+        if chain_specific:
+            return chain_specific
+
+    generic = os.environ.get("EVM_RPC_URL") or os.environ.get("WEB3_PROVIDER_URL")
+    if generic:
+        return generic
+
+    if network:
+        config = NETWORK_CONFIGS.get(network)
+        if config:
+            return config.get("default_rpc_url")
+
+    return None
+
+
 def is_valid_network(network: str) -> bool:
     """Check if network is a valid eip155 network identifier.
 
@@ -121,6 +160,11 @@ def create_nonce() -> str:
     return "0x" + os.urandom(32).hex()
 
 
+def create_permit2_nonce() -> str:
+    """Generate random uint256 nonce for Permit2 as a decimal string."""
+    return str(int.from_bytes(os.urandom(32), "big"))
+
+
 def normalize_address(address: str) -> str:
     """Normalize Ethereum address to checksummed format.
 
diff --git a/python/x402/src/bankofai/x402/mechanisms/svm/exact/client.py b/python/x402/src/bankofai/x402/mechanisms/svm/exact/client.py
index 21037c0a..abc75ce1 100644
--- a/python/x402/src/bankofai/x402/mechanisms/svm/exact/client.py
+++ b/python/x402/src/bankofai/x402/mechanisms/svm/exact/client.py
@@ -85,6 +85,7 @@ def _get_client(self, network: str) -> SolanaClient:
     def create_payment_payload(
         self,
         requirements: PaymentRequirements,
+        context=None,
     ) -> dict[str, Any]:
         """Create signed SPL TransferChecked inner payload.
 
diff --git a/python/x402/src/bankofai/x402/mechanisms/svm/exact/v1/client.py b/python/x402/src/bankofai/x402/mechanisms/svm/exact/v1/client.py
index 0058f3fd..5886af80 100644
--- a/python/x402/src/bankofai/x402/mechanisms/svm/exact/v1/client.py
+++ b/python/x402/src/bankofai/x402/mechanisms/svm/exact/v1/client.py
@@ -89,6 +89,7 @@ def _get_client(self, network: str) -> SolanaClient:
     def create_payment_payload(
         self,
         requirements: PaymentRequirementsV1,
+        context=None,
     ) -> dict[str, Any]:
         """Create signed SPL TransferChecked inner payload (V1 format).
 
diff --git a/python/x402/src/bankofai/x402/mechanisms/tron/__init__.py b/python/x402/src/bankofai/x402/mechanisms/tron/__init__.py
index 77cdda5e..f3aedebc 100644
--- a/python/x402/src/bankofai/x402/mechanisms/tron/__init__.py
+++ b/python/x402/src/bankofai/x402/mechanisms/tron/__init__.py
@@ -2,9 +2,16 @@
 
 from .constants import (
     AUTHORIZATION_TYPES,
+    PERMIT2_ADDRESSES,
+    PERMIT2_WITNESS_TYPES,
     SCHEME_EXACT,
     TRON_CHAIN_IDS,
     TRON_DEFAULT_ASSETS,
+    TRON_NETWORK_CONFIGS,
+    X402_PERMIT2_PROXY_ADDRESSES,
+    AssetInfo,
+    NetworkConfig,
+    x402ExactPermit2ProxyABI,
 )
 from .exact import (
     ExactTronClientScheme,
@@ -14,22 +21,62 @@
     register_exact_tron_facilitator,
     register_exact_tron_server,
 )
-from .signers import ClientTronSigner, FacilitatorTronSigner
-from .utils import get_tron_chain_id, normalize_address_for_signing, tron_address_to_evm
+from .signer import ClientTronSigner, FacilitatorTronSigner
+from .signers import ClientTronSigner as ClientTronSignerImpl
+from .signers import FacilitatorTronSigner as FacilitatorTronSignerImpl
+from .types import (
+    ExactEIP3009Authorization,
+    ExactEIP3009Payload,
+    ExactPermit2Payload,
+    ExactTronPayloadV1,
+    ExactTronPayloadV2,
+    Permit2Authorization,
+    Permit2Witness,
+    is_permit2_payload,
+)
+from .utils import (
+    create_nonce,
+    get_asset_info,
+    get_network_config,
+    get_tron_chain_id,
+    normalize_address_for_signing,
+    tron_address_to_evm,
+)
 
 __all__ = [
     # Constants
     "TRON_CHAIN_IDS",
     "TRON_DEFAULT_ASSETS",
+    "TRON_NETWORK_CONFIGS",
     "AUTHORIZATION_TYPES",
+    "PERMIT2_WITNESS_TYPES",
     "SCHEME_EXACT",
+    "PERMIT2_ADDRESSES",
+    "X402_PERMIT2_PROXY_ADDRESSES",
+    "x402ExactPermit2ProxyABI",
+    "AssetInfo",
+    "NetworkConfig",
     # Signers
     "FacilitatorTronSigner",
     "ClientTronSigner",
+    "FacilitatorTronSignerImpl",
+    "ClientTronSignerImpl",
     # Utils
     "get_tron_chain_id",
+    "get_network_config",
+    "get_asset_info",
+    "create_nonce",
     "normalize_address_for_signing",
     "tron_address_to_evm",
+    # Types
+    "ExactEIP3009Authorization",
+    "ExactEIP3009Payload",
+    "ExactPermit2Payload",
+    "ExactTronPayloadV1",
+    "ExactTronPayloadV2",
+    "Permit2Authorization",
+    "Permit2Witness",
+    "is_permit2_payload",
     # Schemes
     "ExactTronClientScheme",
     "ExactTronFacilitatorScheme",
diff --git a/python/x402/src/bankofai/x402/mechanisms/tron/constants.py b/python/x402/src/bankofai/x402/mechanisms/tron/constants.py
index 6f233780..143f5d58 100644
--- a/python/x402/src/bankofai/x402/mechanisms/tron/constants.py
+++ b/python/x402/src/bankofai/x402/mechanisms/tron/constants.py
@@ -1,6 +1,15 @@
-"""TRON constants for the exact payment scheme."""
+"""TRON mechanism constants - network configs, ABIs, error codes."""
 
-from typing import Any
+from typing import Any, TypedDict
+
+# Scheme identifier
+SCHEME_EXACT = "exact"
+
+# Default validity period (1 hour in seconds)
+DEFAULT_VALIDITY_PERIOD = 3600
+
+# Default validity buffer (10 minutes before now for clock skew)
+DEFAULT_VALIDITY_BUFFER = 600
 
 # TRON chain IDs for TIP-712 signing
 TRON_CHAIN_IDS: dict[str, int] = {
@@ -9,28 +18,66 @@
     "tron:nile": 3448148188,  # 0xcd8690dc
 }
 
-# Default stablecoins per network (USDT)
-TRON_DEFAULT_ASSETS: dict[str, dict[str, Any]] = {
+
+class _AssetInfoRequired(TypedDict):
+    address: str
+    name: str
+    version: str
+    decimals: int
+
+
+class AssetInfo(_AssetInfoRequired, total=False):
+    asset_transfer_method: str
+
+
+class _NetworkConfigRequired(TypedDict):
+    chain_id: int
+
+
+class NetworkConfig(_NetworkConfigRequired, total=False):
+    default_asset: AssetInfo
+
+
+TRON_NETWORK_CONFIGS: dict[str, NetworkConfig] = {
     "tron:mainnet": {
-        "address": "TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t",
-        "name": "Tether USD",
-        "version": "1",
-        "decimals": 6,
+        "chain_id": TRON_CHAIN_IDS["tron:mainnet"],
+        "default_asset": {
+            "address": "TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t",
+            "name": "Tether USD",
+            "version": "1",
+            "decimals": 6,
+        },
     },
     "tron:nile": {
-        "address": "TXYZopYRdj2D9XRtbG411XZZ3kM5VkAeBf",
-        "name": "Tether USD",
-        "version": "1",
-        "decimals": 6,
+        "chain_id": TRON_CHAIN_IDS["tron:nile"],
+        "default_asset": {
+            "address": "TXYZopYRdj2D9XRtbG411XZZ3kM5VkAeBf",
+            "name": "Tether USD",
+            "version": "1",
+            "decimals": 6,
+        },
     },
     "tron:shasta": {
-        "address": "TG3XXyExBkPp9nzdajDZsozEu4BkaSJozs",
-        "name": "Tether USD",
-        "version": "1",
-        "decimals": 6,
+        "chain_id": TRON_CHAIN_IDS["tron:shasta"],
+        "default_asset": {
+            "address": "TG3XXyExBkPp9nzdajDZsozEu4BkaSJozs",
+            "name": "Tether USD",
+            "version": "1",
+            "decimals": 6,
+        },
     },
 }
 
+# Default fee limit used for TRON contract calls (1,000 TRX).
+DEFAULT_FEE_LIMIT_SUN = 1_000_000_000
+
+# Backwards-compatible alias for defaults
+TRON_DEFAULT_ASSETS: dict[str, dict[str, Any]] = {
+    network: config["default_asset"]  # type: ignore[index]
+    for network, config in TRON_NETWORK_CONFIGS.items()
+    if config.get("default_asset")
+}
+
 # TIP-712 type definitions for TransferWithAuthorization
 AUTHORIZATION_TYPES: dict[str, list[dict[str, str]]] = {
     "TransferWithAuthorization": [
@@ -43,8 +90,43 @@
     ]
 }
 
-SCHEME_EXACT = "exact"
-DEFAULT_FEE_LIMIT_SUN = 1_000_000_000  # 1000 TRX
+# TIP-712 type definitions for Permit2 PermitWitnessTransferFrom
+PERMIT2_WITNESS_TYPES: dict[str, list[dict[str, str]]] = {
+    "PermitWitnessTransferFrom": [
+        {"name": "permitted", "type": "TokenPermissions"},
+        {"name": "spender", "type": "address"},
+        {"name": "nonce", "type": "uint256"},
+        {"name": "deadline", "type": "uint256"},
+        {"name": "witness", "type": "Witness"},
+    ],
+    "TokenPermissions": [
+        {"name": "token", "type": "address"},
+        {"name": "amount", "type": "uint256"},
+    ],
+    "Witness": [
+        {"name": "to", "type": "address"},
+        {"name": "facilitator", "type": "address"},
+        {"name": "validAfter", "type": "uint256"},
+    ],
+}
+
+# Permit2 contract addresses per TRON network
+PERMIT2_ADDRESSES: dict[str, str] = {
+    "tron:mainnet": "TTJxU3P8rHycAyFY4kVtGNfmnMH4ezcuM9",
+    "tron:nile": "TYQuuhGbEMxF7nZxUHV3uHJxAVVAegNU9h",
+}
+
+# x402ExactPermit2Proxy contract addresses
+X402_PERMIT2_PROXY_ADDRESSES: dict[str, str] = {
+    "tron:mainnet": "TSm6MSWHHBeABh22uqX7SU7QUweav4Cyy6",
+    "tron:nile": "TCd2ZSwbJBAdgFfP5d3gkhKcGs47WNZLLi",
+}
+
+# x402UptoPermit2Proxy contract addresses
+X402_UPTO_PERMIT2_PROXY_ADDRESSES: dict[str, str] = {
+    "tron:mainnet": "TGHEYAovw8fZz1bgnVgRtgrdGLbagFZYq5",
+    "tron:nile": "TSForFRqxmZdJ6Yfx2rNaFykhuQLc9cTMR",
+}
 
 # Error messages
 ERR_INVALID_SCHEME = "invalid_scheme"
@@ -72,40 +154,67 @@
 ERR_PERMIT2_INVALID_SIGNATURE = "permit2_invalid_signature"
 ERR_PERMIT2_ALLOWANCE_REQUIRED = "permit2_allowance_required"
 
-# Permit2 contract addresses per TRON network
-PERMIT2_ADDRESSES: dict[str, str] = {
-    "tron:mainnet": "TTJxU3P8rHycAyFY4kVtGNfmnMH4ezcuM9",
-    "tron:nile": "TYQuuhGbEMxF7nZxUHV3uHJxAVVAegNU9h",
-}
+# TRC-20 approval gas sponsoring errors
+ERR_TRC20_APPROVAL_FORMAT = "invalid_trc20_approval_format"
+ERR_TRC20_APPROVAL_FROM_MISMATCH = "invalid_trc20_approval_from_mismatch"
+ERR_TRC20_APPROVAL_ASSET_MISMATCH = "invalid_trc20_approval_asset_mismatch"
+ERR_TRC20_APPROVAL_SPENDER_NOT_PERMIT2 = "invalid_trc20_approval_spender_not_permit2"
+ERR_TRC20_APPROVAL_TX_MISSING_DATA = "invalid_trc20_approval_tx_missing_data"
+ERR_TRC20_APPROVAL_TX_WRONG_TARGET = "invalid_trc20_approval_tx_wrong_target"
+ERR_TRC20_APPROVAL_TX_WRONG_SELECTOR = "invalid_trc20_approval_tx_wrong_selector"
+ERR_TRC20_APPROVAL_TX_WRONG_SPENDER = "invalid_trc20_approval_tx_wrong_spender"
+ERR_TRC20_APPROVAL_TX_WRONG_AMOUNT = "invalid_trc20_approval_tx_wrong_amount"
+ERR_TRC20_APPROVAL_TX_INVALID_SIGNATURE = "invalid_trc20_approval_tx_invalid_signature"
 
-# x402ExactPermit2Proxy contract addresses
-X402_PERMIT2_PROXY_ADDRESSES: dict[str, str] = {
-    "tron:mainnet": "TSm6MSWHHBeABh22uqX7SU7QUweav4Cyy6",
-    "tron:nile": "TCd2ZSwbJBAdgFfP5d3gkhKcGs47WNZLLi",
-}
+# x402ExactPermit2Proxy ABI - settle function for exact payment scheme.
+x402ExactPermit2ProxyABI = [
+    {
+        "type": "function",
+        "name": "settle",
+        "inputs": [
+            {
+                "name": "permit",
+                "type": "tuple",
+                "components": [
+                    {
+                        "name": "permitted",
+                        "type": "tuple",
+                        "components": [
+                            {"name": "token", "type": "address"},
+                            {"name": "amount", "type": "uint256"},
+                        ],
+                    },
+                    {"name": "nonce", "type": "uint256"},
+                    {"name": "deadline", "type": "uint256"},
+                ],
+            },
+            {"name": "owner", "type": "address"},
+            {
+                "name": "witness",
+                "type": "tuple",
+                "components": [
+                    {"name": "to", "type": "address"},
+                    {"name": "facilitator", "type": "address"},
+                    {"name": "validAfter", "type": "uint256"},
+                ],
+            },
+            {"name": "signature", "type": "bytes"},
+        ],
+        "outputs": [],
+        "stateMutability": "nonpayable",
+    }
+]
 
-# x402UptoPermit2Proxy contract addresses
-X402_UPTO_PERMIT2_PROXY_ADDRESSES: dict[str, str] = {
-    "tron:mainnet": "TGHEYAovw8fZz1bgnVgRtgrdGLbagFZYq5",
-    "tron:nile": "TSForFRqxmZdJ6Yfx2rNaFykhuQLc9cTMR",
-}
-
-# TIP-712 type definitions for Permit2 PermitWitnessTransferFrom
-PERMIT2_WITNESS_TYPES: dict[str, list[dict[str, str]]] = {
-    "PermitWitnessTransferFrom": [
-        {"name": "permitted", "type": "TokenPermissions"},
-        {"name": "spender", "type": "address"},
-        {"name": "nonce", "type": "uint256"},
-        {"name": "deadline", "type": "uint256"},
-        {"name": "witness", "type": "Witness"},
-    ],
-    "TokenPermissions": [
-        {"name": "token", "type": "address"},
-        {"name": "amount", "type": "uint256"},
-    ],
-    "Witness": [
-        {"name": "to", "type": "address"},
-        {"name": "facilitator", "type": "address"},
-        {"name": "validAfter", "type": "uint256"},
-    ],
-}
+# TRC-20 allowance ABI (view) for Permit2 approvals.
+TRC20_ALLOWANCE_ABI = [
+    {
+        "type": "function",
+        "name": "allowance",
+        "stateMutability": "view",
+        "inputs": [
+            {"name": "owner", "type": "address"},
+            {"name": "spender", "type": "address"},
+        ],
+        "outputs": [{"name": "allowance", "type": "uint256"}],
+    }
+]
diff --git a/python/x402/src/bankofai/x402/mechanisms/tron/exact/client.py b/python/x402/src/bankofai/x402/mechanisms/tron/exact/client.py
index 478d723c..eeae7eff 100644
--- a/python/x402/src/bankofai/x402/mechanisms/tron/exact/client.py
+++ b/python/x402/src/bankofai/x402/mechanisms/tron/exact/client.py
@@ -5,6 +5,8 @@
 import time
 from typing import Any
 
+from ....extensions.trc20_approval_gas_sponsoring import TRC20_APPROVAL_GAS_SPONSORING
+from ....interfaces import PaymentPayloadContext
 from ....schemas import PaymentRequirements
 from ..constants import (
     AUTHORIZATION_TYPES,
@@ -13,91 +15,118 @@
     SCHEME_EXACT,
     X402_PERMIT2_PROXY_ADDRESSES,
 )
-from ..signers import ClientTronSigner
+from ..signer import ClientTronSigner
+from ..types import (
+    ExactEIP3009Authorization,
+    ExactEIP3009Payload,
+    ExactPermit2Payload,
+    Permit2Authorization,
+    Permit2Witness,
+)
 from ..utils import create_nonce, get_tron_chain_id, normalize_address_for_signing
+from .trc20approval import sign_trc20_approval_transaction
 
 
 class ExactTronClientScheme:
-    """TRON client implementation for the Exact payment scheme (V2).
-
-    Attributes:
-        scheme: The scheme identifier ("exact").
-    """
+    """TRON client implementation for the Exact payment scheme (V2)."""
 
     scheme = SCHEME_EXACT
 
     def __init__(self, signer: ClientTronSigner):
-        """Create ExactTronClientScheme.
-
-        Args:
-            signer: TRON signer for payment authorizations.
-        """
         self._signer = signer
 
     def create_payment_payload(
-        self,
-        requirements: PaymentRequirements,
-    ) -> dict[str, Any]:
-        """Create signed TIP-712 inner payload (Permit2 or EIP3009).
-
-        Args:
-            requirements: Payment requirements from server.
-
-        Returns:
-            Inner payload dict (authorization + signature).
-        """
+        self, requirements: PaymentRequirements, context: PaymentPayloadContext | None = None
+    ) -> dict[str, Any] | tuple[dict[str, Any], dict[str, Any]]:
         extra = requirements.extra or {}
-        method = extra.get("assetTransferMethod", "eip3009")
+        asset_transfer_method = extra.get("assetTransferMethod", "transferWithAuthorization")
+        if asset_transfer_method in {"tip712", "eip3009"}:
+            asset_transfer_method = "transferWithAuthorization"
+
+        if asset_transfer_method == "permit2":
+            payload = self._create_permit2_payload(requirements)
+            extensions = self._try_build_trc20_approval_extension(requirements, context)
+            if extensions:
+                return payload, extensions
+            return payload
 
-        if method == "permit2":
-            return self._create_permit2_payload(requirements)
-        else:
-            return self._create_eip3009_payload(requirements)
+        return self._create_eip3009_payload(requirements)
 
     def _create_eip3009_payload(self, requirements: PaymentRequirements) -> dict[str, Any]:
-        """Create TIP-712 TransferWithAuthorization payload."""
         nonce = create_nonce()
         now = int(time.time())
-        valid_after = 0
-        valid_before = now + (requirements.max_timeout_seconds or 3600)
-
-        authorization = {
-            "from": self._signer.address,
-            "to": requirements.pay_to,
-            "value": str(requirements.amount),
-            "validAfter": str(valid_after),
-            "validBefore": str(valid_before),
-            "nonce": nonce,
-        }
+
+        authorization = ExactEIP3009Authorization(
+            from_address=normalize_address_for_signing(self._signer.address),
+            to=normalize_address_for_signing(requirements.pay_to),
+            value=str(requirements.amount),
+            valid_after=str(now - 600),
+            valid_before=str(now + (requirements.max_timeout_seconds or 3600)),
+            nonce=nonce,
+        )
 
         signature = self._sign_eip3009(authorization, requirements)
+        payload = ExactEIP3009Payload(authorization=authorization, signature=signature)
+        return payload.to_dict()
+
+    def _try_build_trc20_approval_extension(
+        self, requirements: PaymentRequirements, context: PaymentPayloadContext | None
+    ) -> dict[str, Any] | None:
+        if context is None or not context.extensions:
+            return None
+        if TRC20_APPROVAL_GAS_SPONSORING.key not in context.extensions:
+            return None
+        if not hasattr(self._signer, "build_trigger_smart_contract_transaction") or not hasattr(
+            self._signer, "sign_transaction"
+        ):
+            return None
+
+        permit2_address = PERMIT2_ADDRESSES.get(str(requirements.network))
+        if not permit2_address:
+            return None
 
-        return {
-            "authorization": authorization,
-            "signature": signature,
-        }
+        try:
+            allowance = self._signer.read_contract(
+                address=requirements.asset,
+                function_name="allowance",
+                args=[self._signer.address, permit2_address],
+            )
+            if int(str(allowance)) >= int(str(requirements.amount)):
+                return None
+        except Exception:
+            # If allowance cannot be read, still try to provide the approval transaction.
+            pass
+
+        info = sign_trc20_approval_transaction(
+            self._signer,
+            requirements.asset,
+            str(requirements.network),
+        )
+        return {TRC20_APPROVAL_GAS_SPONSORING.key: {"info": info, "schema": {}}}
 
     def _sign_eip3009(
-        self, authorization: dict[str, Any], requirements: PaymentRequirements
+        self, authorization: ExactEIP3009Authorization, requirements: PaymentRequirements
     ) -> str:
-        """Sign TIP-712 domain and message."""
         extra = requirements.extra or {}
-        chain_id = get_tron_chain_id(str(requirements.network))
+        if "name" not in extra or "version" not in extra:
+            raise ValueError(
+                f"TIP-712 domain parameters (name, version) required for {requirements.asset}"
+            )
 
         domain = {
-            "name": extra.get("name", "Tether USD"),
-            "version": extra.get("version", "1"),
-            "chainId": chain_id,
+            "name": extra["name"],
+            "version": extra["version"],
+            "chainId": get_tron_chain_id(str(requirements.network)),
             "verifyingContract": normalize_address_for_signing(requirements.asset),
         }
 
         message = {
-            "from": normalize_address_for_signing(authorization["from"]),
-            "to": normalize_address_for_signing(authorization["to"]),
-            "value": int(authorization["value"]),
-            "validAfter": int(authorization["validAfter"]),
-            "validBefore": int(authorization["validBefore"]),
-            "nonce": bytes.fromhex(authorization["nonce"].removeprefix("0x")),
+            "from": normalize_address_for_signing(authorization.from_address),
+            "to": normalize_address_for_signing(authorization.to),
+            "value": int(authorization.value),
+            "validAfter": int(authorization.valid_after),
+            "validBefore": int(authorization.valid_before),
+            "nonce": bytes.fromhex(authorization.nonce.removeprefix("0x")),
         }
 
         return self._signer.sign_typed_data(
@@ -108,9 +137,7 @@ def _sign_eip3009(
         )
 
     def _create_permit2_payload(self, requirements: PaymentRequirements) -> dict[str, Any]:
-        """Create TIP-712 Permit2 payload."""
         now = int(time.time())
-        nonce = create_nonce()
         network = str(requirements.network)
 
         permit2_address = PERMIT2_ADDRESSES.get(network)
@@ -127,37 +154,31 @@ def _create_permit2_payload(self, requirements: PaymentRequirements) -> dict[str
             requirements.extra or {}
         ).get("facilitatorAddress")
         if not facilitator_address:
-            raise ValueError(
-                "Permit2 facilitator address is required in payment requirements extra"
-            )
-
-        permit2_authorization = {
-            "from": normalize_address_for_signing(self._signer.address),
-            "permitted": {
-                "token": normalize_address_for_signing(requirements.asset),
-                "amount": str(requirements.amount),
-            },
-            "spender": normalize_address_for_signing(proxy_address),
-            "nonce": nonce,
-            "deadline": str(now + (requirements.max_timeout_seconds or 3600)),
-            "witness": {
-                "to": normalize_address_for_signing(requirements.pay_to),
-                "facilitator": normalize_address_for_signing(str(facilitator_address)),
-                "validAfter": str(now - 600),
-            },
-        }
+            raise ValueError("Permit2 facilitator address required in payment requirements extra")
+
+        permit2_authorization = Permit2Authorization(
+            from_address=normalize_address_for_signing(self._signer.address),
+            permitted_token=normalize_address_for_signing(requirements.asset),
+            permitted_amount=str(requirements.amount),
+            spender=normalize_address_for_signing(proxy_address),
+            nonce=create_nonce(),
+            deadline=str(now + (requirements.max_timeout_seconds or 3600)),
+            witness=Permit2Witness(
+                to=normalize_address_for_signing(requirements.pay_to),
+                facilitator=normalize_address_for_signing(str(facilitator_address)),
+                valid_after=str(now - 600),
+            ),
+        )
 
         signature = self._sign_permit2(permit2_authorization, requirements)
-
-        return {
-            "permit2Authorization": permit2_authorization,
-            "signature": signature,
-        }
+        payload = ExactPermit2Payload(
+            permit2_authorization=permit2_authorization, signature=signature
+        )
+        return payload.to_dict()
 
     def _sign_permit2(
-        self, permit2_authorization: dict[str, Any], requirements: PaymentRequirements
+        self, authorization: Permit2Authorization, requirements: PaymentRequirements
     ) -> str:
-        """Sign a PermitWitnessTransferFrom payload."""
         network = str(requirements.network)
         permit2_address = PERMIT2_ADDRESSES.get(network)
         if not permit2_address:
@@ -171,16 +192,16 @@ def _sign_permit2(
 
         message = {
             "permitted": {
-                "token": permit2_authorization["permitted"]["token"],
-                "amount": int(permit2_authorization["permitted"]["amount"]),
+                "token": authorization.permitted_token,
+                "amount": int(authorization.permitted_amount),
             },
-            "spender": permit2_authorization["spender"],
-            "nonce": int(str(permit2_authorization["nonce"]), 0),
-            "deadline": int(permit2_authorization["deadline"]),
+            "spender": authorization.spender,
+            "nonce": int(authorization.nonce, 0),
+            "deadline": int(authorization.deadline),
             "witness": {
-                "to": permit2_authorization["witness"]["to"],
-                "facilitator": permit2_authorization["witness"]["facilitator"],
-                "validAfter": int(permit2_authorization["witness"]["validAfter"]),
+                "to": authorization.witness.to,
+                "facilitator": authorization.witness.facilitator,
+                "validAfter": int(authorization.witness.valid_after),
             },
         }
 
diff --git a/python/x402/src/bankofai/x402/mechanisms/tron/exact/eip3009.py b/python/x402/src/bankofai/x402/mechanisms/tron/exact/eip3009.py
index 7973c554..7efc1f8e 100644
--- a/python/x402/src/bankofai/x402/mechanisms/tron/exact/eip3009.py
+++ b/python/x402/src/bankofai/x402/mechanisms/tron/exact/eip3009.py
@@ -1,7 +1,4 @@
-"""TRON eip3009 (TransferWithAuthorization) facilitator logic.
-
-Mirrors the TypeScript verifyEIP3009() / settleEIP3009() functions.
-"""
+"""TRON TIP-712 (TransferWithAuthorization) facilitator logic."""
 
 import time
 from typing import Any
@@ -22,8 +19,12 @@
     ERR_VALUE_MISMATCH,
     SCHEME_EXACT,
 )
-from ..signers import FacilitatorTronSigner
-from ..utils import get_tron_chain_id, normalize_address_for_signing
+from ..signer import FacilitatorTronSigner
+from ..utils import (
+    get_tron_chain_id,
+    normalize_address_for_contract_call,
+    normalize_address_for_signing,
+)
 
 
 def verify_eip3009(
@@ -32,27 +33,20 @@ def verify_eip3009(
     requirements: PaymentRequirements,
     raw: dict[str, Any],
 ) -> VerifyResponse:
-    """Verify a TIP-712 TransferWithAuthorization payment payload.
-
-    Mirrors the TypeScript verifyEIP3009() function exactly.
-    """
+    """Verify a TIP-712 TransferWithAuthorization payment payload."""
     auth = raw.get("authorization", {})
     payer = auth.get("from", "")
 
-    # Scheme check
     if payload.accepted.scheme != SCHEME_EXACT or requirements.scheme != SCHEME_EXACT:
         return VerifyResponse(is_valid=False, invalid_reason=ERR_INVALID_SCHEME, payer=payer)
 
-    # TIP-712 domain params
     extra = requirements.extra or {}
     if "name" not in extra or "version" not in extra:
         return VerifyResponse(is_valid=False, invalid_reason=ERR_MISSING_TIP712_DOMAIN, payer=payer)
 
-    # Network match
     if str(payload.accepted.network) != str(requirements.network):
         return VerifyResponse(is_valid=False, invalid_reason=ERR_NETWORK_MISMATCH, payer=payer)
 
-    # Build TIP-712 domain and message
     try:
         chain_id = get_tron_chain_id(str(requirements.network))
     except ValueError:
@@ -72,7 +66,7 @@ def verify_eip3009(
         "value": int(str(auth.get("value", 0))),
         "validAfter": int(str(auth.get("validAfter", 0))),
         "validBefore": int(str(auth.get("validBefore", 0))),
-        "nonce": bytes.fromhex(nonce_hex.removeprefix("0x")),  # bytes32
+        "nonce": bytes.fromhex(nonce_hex.removeprefix("0x")),
     }
 
     signature = str(raw.get("signature", ""))
@@ -87,35 +81,34 @@ def verify_eip3009(
     if not is_valid:
         return VerifyResponse(is_valid=False, invalid_reason=ERR_INVALID_SIGNATURE, payer=payer)
 
-    # Recipient check
     if normalize_address_for_signing(auth.get("to", "")) != normalize_address_for_signing(
         requirements.pay_to
     ):
         return VerifyResponse(is_valid=False, invalid_reason=ERR_RECIPIENT_MISMATCH, payer=payer)
 
-    # Timing check
     now = int(time.time())
     if int(auth.get("validBefore", 0)) < now + 6:
         return VerifyResponse(is_valid=False, invalid_reason=ERR_VALID_BEFORE_EXPIRED, payer=payer)
     if int(auth.get("validAfter", 0)) > now:
         return VerifyResponse(is_valid=False, invalid_reason=ERR_VALID_AFTER_FUTURE, payer=payer)
 
-    # Amount check
     if int(auth.get("value", 0)) != int(requirements.amount):
         return VerifyResponse(is_valid=False, invalid_reason=ERR_VALUE_MISMATCH, payer=payer)
 
-    # Balance check (best-effort)
     try:
+        payer_for_contract = normalize_address_for_contract_call(str(auth.get("from", "")))
         balance = signer.read_contract(
             address=requirements.asset,
             function_name="balanceOf",
-            args=[auth.get("from", "")],
+            args=[payer_for_contract],
         )
         if int(str(balance)) < int(str(requirements.amount)):
             return VerifyResponse(
                 is_valid=False,
                 invalid_reason=ERR_INSUFFICIENT_FUNDS,
-                invalid_message=f"Insufficient funds. Required: {requirements.amount}, Available: {balance}",
+                invalid_message=(
+                    f"Insufficient funds. Required: {requirements.amount}, Available: {balance}"
+                ),
                 payer=payer,
             )
     except Exception:
@@ -130,15 +123,11 @@ def settle_eip3009(
     requirements: PaymentRequirements,
     raw: dict[str, Any],
 ) -> SettleResponse:
-    """Settle a TIP-712 TransferWithAuthorization payment on-chain.
-
-    Mirrors the TypeScript settleEIP3009() function.
-    """
+    """Settle a TIP-712 TransferWithAuthorization payment on-chain."""
     auth = raw.get("authorization", {})
     payer = auth.get("from", "")
     network = str(requirements.network)
 
-    # Re-verify
     verify_result = verify_eip3009(signer, payload, requirements, raw)
     if not verify_result.is_valid:
         return SettleResponse(
@@ -149,20 +138,21 @@ def settle_eip3009(
             payer=payer,
         )
 
-    # Parse signature into v, r, s
     clean_sig = str(raw.get("signature", "")).removeprefix("0x")
-    r = bytes.fromhex(clean_sig[:64])  # bytes32
-    s = bytes.fromhex(clean_sig[64:128])  # bytes32
-    v = int(clean_sig[128:130], 16)  # uint8
+    r = bytes.fromhex(clean_sig[:64])
+    s = bytes.fromhex(clean_sig[64:128])
+    v = int(clean_sig[128:130], 16)
     nonce_bytes = bytes.fromhex(str(auth.get("nonce", "0x" + "00" * 32)).removeprefix("0x"))
 
     try:
+        from_for_contract = normalize_address_for_contract_call(str(auth.get("from", "")))
+        to_for_contract = normalize_address_for_contract_call(str(auth.get("to", "")))
         tx = signer.write_contract(
             address=requirements.asset,
             function_name="transferWithAuthorization",
             args=[
-                str(auth.get("from", "")),
-                str(auth.get("to", "")),
+                from_for_contract,
+                to_for_contract,
                 int(str(auth.get("value", 0))),
                 int(str(auth.get("validAfter", 0))),
                 int(str(auth.get("validBefore", 0))),
@@ -184,7 +174,6 @@ def settle_eip3009(
                 payer=payer,
             )
         return SettleResponse(success=True, transaction=tx, network=network, payer=payer)
-
     except Exception as e:
         return SettleResponse(
             success=False,
diff --git a/python/x402/src/bankofai/x402/mechanisms/tron/exact/facilitator.py b/python/x402/src/bankofai/x402/mechanisms/tron/exact/facilitator.py
index 72ad5e54..8a345d17 100644
--- a/python/x402/src/bankofai/x402/mechanisms/tron/exact/facilitator.py
+++ b/python/x402/src/bankofai/x402/mechanisms/tron/exact/facilitator.py
@@ -1,41 +1,17 @@
-"""TRON facilitator scheme for the Exact payment mechanism (v2 Python SDK).
-
-Mirrors ExactTronScheme from TypeScript: routes between TIP-712 (eip3009)
-and Permit2 based on the payload structure (permit2Authorization vs authorization).
-"""
+"""TRON facilitator scheme for the Exact payment mechanism (v2 Python SDK)."""
 
 from typing import Any
 
-from ....schemas import (
-    PaymentPayload,
-    PaymentRequirements,
-    SettleResponse,
-    VerifyResponse,
-)
-from ..constants import (
-    SCHEME_EXACT,
-    X402_PERMIT2_PROXY_ADDRESSES,
-)
-from ..signers import FacilitatorTronSigner
+from ....schemas import PaymentPayload, PaymentRequirements, SettleResponse, VerifyResponse
+from ..constants import SCHEME_EXACT
+from ..signer import FacilitatorTronSigner
+from ..types import ExactPermit2Payload, is_permit2_payload
 from .eip3009 import settle_eip3009, verify_eip3009
 from .permit2 import settle_permit2, verify_permit2
 
 
-def _is_permit2_payload(raw: dict[str, Any]) -> bool:
-    """Return True if the raw payload uses the Permit2 path (has permit2Authorization)."""
-    return "permit2Authorization" in raw
-
-
 class ExactTronScheme:
-    """TRON facilitator for the Exact payment scheme.
-
-    Thin router that delegates to TIP-712 (eip3009) or Permit2
-    based on payload type — identical to the TypeScript ExactTronScheme.
-
-    Attributes:
-        scheme: Always "exact".
-        caip_family: Always "tron:*".
-    """
+    """TRON facilitator for the Exact payment scheme."""
 
     scheme = SCHEME_EXACT
     caip_family = "tron:*"
@@ -44,19 +20,12 @@ def __init__(self, signer: FacilitatorTronSigner) -> None:
         self._signer = signer
 
     def get_extra(self, network: str) -> dict[str, Any] | None:
-        """Return supported asset transfer methods and Permit2 proxy address."""
-        supported_methods = ["eip3009"]
         signers = self._signer.get_addresses()
-        if X402_PERMIT2_PROXY_ADDRESSES.get(network):
-            supported_methods.append("permit2")
-
-        extra: dict[str, Any] = {"supportedAssetTransferMethods": supported_methods}
-        if signers and X402_PERMIT2_PROXY_ADDRESSES.get(network):
-            extra["permit2FacilitatorAddress"] = signers[0]
-        return extra
+        if signers:
+            return {"permit2FacilitatorAddress": signers[0]}
+        return None
 
     def get_signers(self, network: str) -> list[str]:
-        """Return facilitator wallet addresses."""
         return list(self._signer.get_addresses())
 
     def verify(
@@ -65,10 +34,15 @@ def verify(
         requirements: PaymentRequirements,
         context: Any = None,
     ) -> VerifyResponse:
-        """Verify — routes to Permit2 or eip3009 based on payload type."""
         raw: dict[str, Any] = payload.payload or {}
-        if _is_permit2_payload(raw):
-            return verify_permit2(self._signer, payload, requirements, raw)
+        if is_permit2_payload(raw):
+            return verify_permit2(
+                self._signer,
+                payload,
+                requirements,
+                ExactPermit2Payload.from_dict(raw),
+                context,
+            )
         return verify_eip3009(self._signer, payload, requirements, raw)
 
     def settle(
@@ -77,8 +51,13 @@ def settle(
         requirements: PaymentRequirements,
         context: Any = None,
     ) -> SettleResponse:
-        """Settle — routes to Permit2 or eip3009 based on payload type."""
         raw: dict[str, Any] = payload.payload or {}
-        if _is_permit2_payload(raw):
-            return settle_permit2(self._signer, payload, requirements, raw)
+        if is_permit2_payload(raw):
+            return settle_permit2(
+                self._signer,
+                payload,
+                requirements,
+                ExactPermit2Payload.from_dict(raw),
+                context,
+            )
         return settle_eip3009(self._signer, payload, requirements, raw)
diff --git a/python/x402/src/bankofai/x402/mechanisms/tron/exact/permit2.py b/python/x402/src/bankofai/x402/mechanisms/tron/exact/permit2.py
index 2b74b693..e41dabb0 100644
--- a/python/x402/src/bankofai/x402/mechanisms/tron/exact/permit2.py
+++ b/python/x402/src/bankofai/x402/mechanisms/tron/exact/permit2.py
@@ -1,11 +1,15 @@
-"""TRON Permit2 facilitator logic: verify and settle Permit2 payments.
-
-Mirrors the TypeScript verifyPermit2() / settlePermit2() functions exactly.
-"""
+"""TRON Permit2 facilitator logic: verify and settle Permit2 payments."""
 
 import time
 from typing import Any
 
+from ....extensions.trc20_approval_gas_sponsoring import (
+    TRC20_APPROVAL_GAS_SPONSORING,
+    Trc20ApprovalGasSponsoringExtension,
+    extract_trc20_approval_gas_sponsoring_info,
+    validate_trc20_approval_gas_sponsoring_info,
+)
+from ....interfaces import FacilitatorContext
 from ....schemas import PaymentPayload, PaymentRequirements, SettleResponse, VerifyResponse
 from ..constants import (
     ERR_INSUFFICIENT_FUNDS,
@@ -23,39 +27,49 @@
     ERR_PERMIT2_RECIPIENT_MISMATCH,
     ERR_PERMIT2_TOKEN_MISMATCH,
     ERR_TRANSACTION_FAILED,
+    ERR_TRC20_APPROVAL_ASSET_MISMATCH,
+    ERR_TRC20_APPROVAL_FORMAT,
+    ERR_TRC20_APPROVAL_FROM_MISMATCH,
+    ERR_TRC20_APPROVAL_SPENDER_NOT_PERMIT2,
+    ERR_TRC20_APPROVAL_TX_INVALID_SIGNATURE,
+    ERR_TRC20_APPROVAL_TX_MISSING_DATA,
+    ERR_TRC20_APPROVAL_TX_WRONG_AMOUNT,
+    ERR_TRC20_APPROVAL_TX_WRONG_SELECTOR,
+    ERR_TRC20_APPROVAL_TX_WRONG_SPENDER,
+    ERR_TRC20_APPROVAL_TX_WRONG_TARGET,
     PERMIT2_ADDRESSES,
     PERMIT2_WITNESS_TYPES,
     X402_PERMIT2_PROXY_ADDRESSES,
 )
-from ..signers import FacilitatorTronSigner
-from ..utils import get_tron_chain_id, normalize_address_for_signing
+from ..signer import FacilitatorTronSigner
+from ..types import ExactPermit2Payload
+from ..utils import (
+    get_tron_chain_id,
+    normalize_address_for_contract_call,
+    normalize_address_for_signing,
+)
 
 
 def verify_permit2(
     signer: FacilitatorTronSigner,
     payload: PaymentPayload,
     requirements: PaymentRequirements,
-    permit2_payload: dict[str, Any],
+    permit2_payload: ExactPermit2Payload,
+    context: FacilitatorContext | None = None,
 ) -> VerifyResponse:
-    """Verify a Permit2 payment payload on TRON.
-
-    Mirrors the TS verifyPermit2() function.
-    """
-    auth = permit2_payload.get("permit2Authorization", {})
-    payer = auth.get("from", "")
+    """Verify a Permit2 payment payload on TRON."""
+    auth = permit2_payload.permit2_authorization
+    payer = auth.from_address
     facilitator_addresses = [normalize_address_for_signing(a) for a in signer.get_addresses()]
 
     network = str(requirements.network)
 
-    # Scheme check
     if payload.accepted.scheme != "exact" or requirements.scheme != "exact":
         return VerifyResponse(is_valid=False, invalid_reason=ERR_INVALID_SCHEME, payer=payer)
 
-    # Network match
     if str(payload.accepted.network) != network:
         return VerifyResponse(is_valid=False, invalid_reason=ERR_NETWORK_MISMATCH, payer=payer)
 
-    # Permit2 contract addresses
     permit2_address = PERMIT2_ADDRESSES.get(network)
     proxy_address = X402_PERMIT2_PROXY_ADDRESSES.get(network)
     if not permit2_address or not proxy_address:
@@ -66,68 +80,58 @@ def verify_permit2(
     normalized_proxy = normalize_address_for_signing(proxy_address)
     token_address = normalize_address_for_signing(requirements.asset)
 
-    # Spender must be x402Permit2Proxy
-    spender = normalize_address_for_signing(auth.get("spender", ""))
-    if spender != normalized_proxy:
+    if normalize_address_for_signing(auth.spender) != normalized_proxy:
         return VerifyResponse(
             is_valid=False, invalid_reason=ERR_INVALID_PERMIT2_SPENDER, payer=payer
         )
 
-    # Recipient check
-    witness = auth.get("witness", {})
-    payload_to = normalize_address_for_signing(witness.get("to", ""))
+    payload_to = normalize_address_for_signing(auth.witness.to)
     required_to = normalize_address_for_signing(requirements.pay_to)
     if payload_to != required_to:
         return VerifyResponse(
             is_valid=False, invalid_reason=ERR_PERMIT2_RECIPIENT_MISMATCH, payer=payer
         )
 
-    # Facilitator check
-    payload_facilitator = normalize_address_for_signing(witness.get("facilitator", ""))
+    payload_facilitator = normalize_address_for_signing(auth.witness.facilitator)
     if payload_facilitator not in facilitator_addresses:
         return VerifyResponse(
             is_valid=False, invalid_reason=ERR_INVALID_PERMIT2_FACILITATOR, payer=payer
         )
 
-    # Timing checks
     now = int(time.time())
-    if int(auth.get("deadline", 0)) < now + 6:
+    if int(auth.deadline) < now + 6:
         return VerifyResponse(
             is_valid=False, invalid_reason=ERR_PERMIT2_DEADLINE_EXPIRED, payer=payer
         )
-    if int(witness.get("validAfter", 0)) > now:
+    if int(auth.witness.valid_after) > now:
         return VerifyResponse(is_valid=False, invalid_reason=ERR_PERMIT2_NOT_YET_VALID, payer=payer)
 
-    # Amount check
-    permitted = auth.get("permitted", {})
-    if int(permitted.get("amount", 0)) != int(requirements.amount):
+    if int(auth.permitted_amount) != int(requirements.amount):
         return VerifyResponse(
             is_valid=False, invalid_reason=ERR_PERMIT2_AMOUNT_MISMATCH, payer=payer
         )
 
-    # Token check
-    if normalize_address_for_signing(permitted.get("token", "")) != token_address:
+    if normalize_address_for_signing(auth.permitted_token) != token_address:
         return VerifyResponse(
             is_valid=False, invalid_reason=ERR_PERMIT2_TOKEN_MISMATCH, payer=payer
         )
 
-    # Signature verification
     try:
         chain_id = get_tron_chain_id(network)
         normalized_permit2 = normalize_address_for_signing(permit2_address)
         domain = {"name": "Permit2", "chainId": chain_id, "verifyingContract": normalized_permit2}
         message = {
             "permitted": {
-                "token": str(permitted.get("token", "")),
-                "amount": int(str(permitted.get("amount", 0))),
+                "token": auth.permitted_token,
+                "amount": int(auth.permitted_amount),
             },
-            "spender": str(auth.get("spender", "")),
-            "nonce": int(str(auth.get("nonce", 0)), 0),
-            "deadline": int(str(auth.get("deadline", 0))),
+            "spender": auth.spender,
+            "nonce": int(auth.nonce, 0),
+            "deadline": int(auth.deadline),
             "witness": {
-                "to": str(witness.get("to", "")),
-                "facilitator": str(witness.get("facilitator", "")),
-                "validAfter": int(str(witness.get("validAfter", 0))),
+                "to": auth.witness.to,
+                "facilitator": auth.witness.facilitator,
+                "validAfter": int(auth.witness.valid_after),
             },
         }
         is_valid = signer.verify_typed_data(
@@ -136,7 +140,7 @@ def verify_permit2(
             types=PERMIT2_WITNESS_TYPES,
             primary_type="PermitWitnessTransferFrom",
             message=message,
-            signature=permit2_payload.get("signature", ""),
+            signature=permit2_payload.signature,
         )
         if not is_valid:
             return VerifyResponse(
@@ -147,32 +151,45 @@ def verify_permit2(
             is_valid=False, invalid_reason=ERR_PERMIT2_INVALID_SIGNATURE, payer=payer
         )
 
-    # Allowance check (best-effort)
     try:
+        payer_for_contract = normalize_address_for_contract_call(payer)
+        permit2_for_contract = normalize_address_for_contract_call(permit2_address)
         allowance = signer.read_contract(
             address=requirements.asset,
             function_name="allowance",
-            args=[payer, permit2_address],
+            args=[payer_for_contract, permit2_for_contract],
         )
         if int(str(allowance)) < int(str(requirements.amount)):
-            return VerifyResponse(
-                is_valid=False, invalid_reason=ERR_PERMIT2_ALLOWANCE_REQUIRED, payer=payer
+            has_extension, extension_error = _verify_trc20_approval_extension(
+                signer, payload, requirements, payer, permit2_address, context
             )
+            if extension_error is not None:
+                return extension_error
+            if not has_extension:
+                return VerifyResponse(
+                    is_valid=False, invalid_reason=ERR_PERMIT2_ALLOWANCE_REQUIRED, payer=payer
+                )
     except Exception:
-        pass
+        has_extension, extension_error = _verify_trc20_approval_extension(
+            signer, payload, requirements, payer, permit2_address, context
+        )
+        if extension_error is not None:
+            return extension_error
 
-    # Balance check (best-effort)
     try:
+        payer_for_contract = normalize_address_for_contract_call(payer)
         balance = signer.read_contract(
             address=requirements.asset,
             function_name="balanceOf",
-            args=[payer],
+            args=[payer_for_contract],
         )
         if int(str(balance)) < int(str(requirements.amount)):
             return VerifyResponse(
                 is_valid=False,
                 invalid_reason=ERR_INSUFFICIENT_FUNDS,
-                invalid_message=f"Insufficient funds. Required: {requirements.amount}, Available: {balance}",
+                invalid_message=(
+                    f"Insufficient funds. Required: {requirements.amount}, Available: {balance}"
+                ),
                 payer=payer,
             )
     except Exception:
@@ -185,18 +202,15 @@ def settle_permit2(
     signer: FacilitatorTronSigner,
     payload: PaymentPayload,
     requirements: PaymentRequirements,
-    permit2_payload: dict[str, Any],
+    permit2_payload: ExactPermit2Payload,
+    context: FacilitatorContext | None = None,
 ) -> SettleResponse:
-    """Settle a Permit2 payment on TRON via x402Permit2Proxy.settle().
-
-    Mirrors the TS settlePermit2() function.
-    """
-    auth = permit2_payload.get("permit2Authorization", {})
-    payer = auth.get("from", "")
+    """Settle a Permit2 payment on TRON via x402Permit2Proxy.settle()."""
+    auth = permit2_payload.permit2_authorization
+    payer = auth.from_address
     network = str(requirements.network)
 
-    # Re-verify
-    verify_result = verify_permit2(signer, payload, requirements, permit2_payload)
+    verify_result = verify_permit2(signer, payload, requirements, permit2_payload, context)
     if not verify_result.is_valid:
         return SettleResponse(
             success=False,
@@ -207,65 +221,59 @@ def settle_permit2(
         )
 
     proxy_address = X402_PERMIT2_PROXY_ADDRESSES[network]
-    permitted = auth.get("permitted", {})
-    witness = auth.get("witness", {})
 
-    signature_hex = str(permit2_payload.get("signature", ""))
-    signature_bytes = bytes.fromhex(signature_hex.removeprefix("0x"))
-
-    # We have to manually encode this because TronPy's `trx_abi` doesn't
-    # currently recursively parse tuple structures perfectly without throwing "ABIEncoderV2 used."
-    # We bypass TronPy's trx_abi completely because it lacks proper ABIEncoderV2 tuple support
+    trc20_info = extract_trc20_approval_gas_sponsoring_info(payload.extensions)
+    if trc20_info and context is not None:
+        needs_approval = True
+        try:
+            permit2_address = PERMIT2_ADDRESSES.get(network)
+            if permit2_address:
+                payer_for_contract = normalize_address_for_contract_call(payer)
+                permit2_for_contract = normalize_address_for_contract_call(permit2_address)
+                allowance = signer.read_contract(
+                    address=requirements.asset,
+                    function_name="allowance",
+                    args=[payer_for_contract, permit2_for_contract],
+                )
+                needs_approval = int(str(allowance)) < int(str(requirements.amount))
+        except Exception:
+            needs_approval = True
+
+        if needs_approval:
+            extension = context.get_extension(TRC20_APPROVAL_GAS_SPONSORING.key)
+            if isinstance(extension, Trc20ApprovalGasSponsoringExtension) and extension.signer:
+                settle_result = _settle_with_trc20_approval(
+                    extension.signer, payload, requirements, permit2_payload, trc20_info
+                )
+                if settle_result is not None:
+                    return settle_result
     try:
-        from eth_abi import encode
-        from eth_utils import keccak
-
-        # TRON addresses must be converted to 0x-prefixed hex for eth_abi
-        def evm_addr(addr: str) -> str:
-            return normalize_address_for_signing(addr)
-
-        permit_evm = (
-            (evm_addr(permitted.get("token", "")), int(str(permitted.get("amount", 0)))),
-            int(str(auth.get("nonce", 0)), 0),
-            int(str(auth.get("deadline", 0))),
-        )
-        witness_evm = (
-            evm_addr(witness.get("to", "")),
-            evm_addr(witness.get("facilitator", "")),
-            int(str(witness.get("validAfter", 0))),
-        )
-        payer_evm = evm_addr(payer)
-
-        signature = (
-            "settle(((address,uint256),uint256,uint256),address,(address,address,uint256),bytes)"
-        )
-        selector = keccak(text=signature)[:4].hex()
-
-        types = [
-            "((address,uint256),uint256,uint256)",
-            "address",
-            "(address,address,uint256)",
-            "bytes",
-        ]
-        encoded_args = encode(types, [permit_evm, payer_evm, witness_evm, signature_bytes]).hex()
-
-        from tronpy.keys import to_hex_address
-
-        txn = signer._client.trx._build_transaction(
-            "TriggerSmartContract",
-            {
-                "owner_address": to_hex_address(signer._address),
-                "contract_address": to_hex_address(proxy_address),
-                "data": selector + encoded_args,
-                "call_value": 0,
-            },
+        from ..constants import x402ExactPermit2ProxyABI
+
+        signature_hex = str(permit2_payload.signature)
+        signature_bytes = bytes.fromhex(signature_hex.removeprefix("0x"))
+        tx = signer.write_contract_with_abi(
+            address=proxy_address,
+            function_name="settle",
+            args=[
+                (
+                    (
+                        normalize_address_for_contract_call(auth.permitted_token),
+                        int(str(auth.permitted_amount)),
+                    ),
+                    int(str(auth.nonce), 0),
+                    int(str(auth.deadline)),
+                ),
+                normalize_address_for_contract_call(payer),
+                (
+                    normalize_address_for_contract_call(auth.witness.to),
+                    normalize_address_for_contract_call(auth.witness.facilitator),
+                    int(str(auth.witness.valid_after)),
+                ),
+                signature_bytes,
+            ],
+            abi=x402ExactPermit2ProxyABI,
         )
-        # Apply fee limit
-        txn = txn.fee_limit(1_000_000_000)
-        # Build, sign and broadcast
-        signed_txn = txn.build().sign(signer._pk)
-        result = signed_txn.broadcast()
-        tx = str(result.txid)
 
         receipt = signer.wait_for_transaction_receipt(tx)
         if receipt.status != "success":
@@ -276,13 +284,8 @@ def evm_addr(addr: str) -> str:
                 network=network,
                 payer=payer,
             )
-
         return SettleResponse(success=True, transaction=tx, network=network, payer=payer)
-
     except Exception as e:
-        import traceback
-
-        traceback.print_exc()
         return SettleResponse(
             success=False,
             error_reason=ERR_TRANSACTION_FAILED,
@@ -293,42 +296,192 @@ def evm_addr(addr: str) -> str:
         )
 
 
-def _get_permit2_proxy_abi() -> list[dict[str, Any]]:
-    """Return the x402Permit2Proxy ABI for the settle function."""
-    return [
-        {
-            "type": "function",
-            "name": "settle",
-            "inputs": [
-                {
-                    "name": "permit",
-                    "type": "tuple",
-                    "components": [
-                        {
-                            "name": "permitted",
-                            "type": "tuple",
-                            "components": [
-                                {"name": "token", "type": "address"},
-                                {"name": "amount", "type": "uint256"},
-                            ],
-                        },
-                        {"name": "nonce", "type": "uint256"},
-                        {"name": "deadline", "type": "uint256"},
-                    ],
-                },
-                {"name": "owner", "type": "address"},
-                {
-                    "name": "witness",
-                    "type": "tuple",
-                    "components": [
-                        {"name": "to", "type": "address"},
-                        {"name": "facilitator", "type": "address"},
-                        {"name": "validAfter", "type": "uint256"},
-                    ],
-                },
-                {"name": "signature", "type": "bytes"},
-            ],
-            "outputs": [],
-            "stateMutability": "nonpayable",
-        }
-    ]
+def _verify_trc20_approval_extension(
+    signer: FacilitatorTronSigner,
+    payload: PaymentPayload,
+    requirements: PaymentRequirements,
+    payer: str,
+    permit2_address: str,
+    context: FacilitatorContext | None,
+) -> tuple[bool, VerifyResponse | None]:
+    info = extract_trc20_approval_gas_sponsoring_info(payload.extensions)
+    if not info:
+        return False, None
+
+    if context is None or context.get_extension(TRC20_APPROVAL_GAS_SPONSORING.key) is None:
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_PERMIT2_ALLOWANCE_REQUIRED, payer=payer
+        )
+
+    if not validate_trc20_approval_gas_sponsoring_info(info):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_TRC20_APPROVAL_FORMAT, payer=payer
+        )
+
+    if normalize_address_for_signing(info.from_address) != normalize_address_for_signing(payer):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_TRC20_APPROVAL_FROM_MISMATCH, payer=payer
+        )
+
+    if normalize_address_for_signing(info.asset) != normalize_address_for_signing(
+        requirements.asset
+    ):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_TRC20_APPROVAL_ASSET_MISMATCH, payer=payer
+        )
+
+    if normalize_address_for_signing(info.spender) != normalize_address_for_signing(
+        permit2_address
+    ):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_TRC20_APPROVAL_SPENDER_NOT_PERMIT2, payer=payer
+        )
+
+    tx = info.signed_transaction
+    if not isinstance(tx, dict):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_TRC20_APPROVAL_TX_MISSING_DATA, payer=payer
+        )
+
+    tx_value = _get_approval_transaction_value(tx)
+    if (
+        not tx_value.get("owner_address")
+        or not tx_value.get("contract_address")
+        or not tx_value.get("data")
+    ):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_TRC20_APPROVAL_TX_MISSING_DATA, payer=payer
+        )
+
+    if normalize_address_for_signing(tx_value["owner_address"]) != normalize_address_for_signing(
+        payer
+    ):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_TRC20_APPROVAL_FROM_MISMATCH, payer=payer
+        )
+
+    if normalize_address_for_signing(tx_value["contract_address"]) != normalize_address_for_signing(
+        requirements.asset
+    ):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_TRC20_APPROVAL_TX_WRONG_TARGET, payer=payer
+        )
+
+    data = str(tx_value["data"]).lower()
+    if not data.startswith(_APPROVE_SELECTOR):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_TRC20_APPROVAL_TX_WRONG_SELECTOR, payer=payer
+        )
+
+    decoded = _decode_approval_calldata(data)
+    if not decoded:
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_TRC20_APPROVAL_TX_WRONG_SELECTOR, payer=payer
+        )
+
+    if normalize_address_for_signing(decoded["spender"]) != normalize_address_for_signing(
+        permit2_address
+    ):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_TRC20_APPROVAL_TX_WRONG_SPENDER, payer=payer
+        )
+
+    if decoded["amount"] != _MAX_UINT256 or info.amount != str(_MAX_UINT256):
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_TRC20_APPROVAL_TX_WRONG_AMOUNT, payer=payer
+        )
+
+    try:
+        sign_weight = signer.get_sign_weight(tx)
+        if not _is_tron_signature_valid(sign_weight):
+            return True, VerifyResponse(
+                is_valid=False, invalid_reason=ERR_TRC20_APPROVAL_TX_INVALID_SIGNATURE, payer=payer
+            )
+    except Exception:
+        return True, VerifyResponse(
+            is_valid=False, invalid_reason=ERR_TRC20_APPROVAL_TX_INVALID_SIGNATURE, payer=payer
+        )
+
+    return True, None
+
+
+def _settle_with_trc20_approval(
+    signer: Any,
+    payload: PaymentPayload,
+    requirements: PaymentRequirements,
+    permit2_payload: ExactPermit2Payload,
+    info: Any,
+) -> SettleResponse | None:
+    payer = permit2_payload.permit2_authorization.from_address
+    network = str(requirements.network)
+    try:
+        tx_hash = signer.send_raw_transaction(info.signed_transaction)
+        receipt = signer.wait_for_transaction_receipt(tx_hash)
+        if receipt.status != "success":
+            return SettleResponse(
+                success=False,
+                error_reason=ERR_TRC20_APPROVAL_TX_INVALID_SIGNATURE,
+                transaction=tx_hash,
+                network=network,
+                payer=payer,
+            )
+    except Exception as e:
+        return SettleResponse(
+            success=False,
+            error_reason=ERR_TRC20_APPROVAL_TX_INVALID_SIGNATURE,
+            error_message=str(e),
+            transaction="",
+            network=network,
+            payer=payer,
+        )
+    return None
+
+
+_APPROVE_SELECTOR = "095ea7b3"
+_MAX_UINT256 = (1 << 256) - 1
+
+
+def _get_approval_transaction_value(tx: dict[str, Any]) -> dict[str, Any]:
+    raw_data = tx.get("raw_data") or {}
+    contract_list = raw_data.get("contract") or []
+    contract = contract_list[0] if contract_list else {}
+    parameter = contract.get("parameter") or {}
+    value = parameter.get("value") or {}
+    return {
+        "owner_address": value.get("owner_address"),
+        "contract_address": value.get("contract_address"),
+        "data": value.get("data"),
+    }
+
+
+def _decode_approval_calldata(data: str) -> dict[str, Any] | None:
+    cleaned = data.removeprefix("0x")
+    if not cleaned.startswith(_APPROVE_SELECTOR):
+        return None
+    if len(cleaned) < 8 + 64 + 64:
+        return None
+    spender_word = cleaned[8 : 8 + 64]
+    amount_word = cleaned[8 + 64 : 8 + 128]
+    spender = "0x" + spender_word[24:].lower()
+    amount = int(amount_word, 16)
+    return {"spender": spender, "amount": amount}
+
+
+def _is_tron_signature_valid(sign_weight: Any) -> bool:
+    if not isinstance(sign_weight, dict):
+        return False
+    result = (
+        sign_weight.get("transaction", {})
+        .get("result", {})
+        .get("result", sign_weight.get("result", {}).get("result"))
+    )
+    if isinstance(result, bool):
+        return result
+    current_weight = sign_weight.get("current_weight")
+    threshold = (sign_weight.get("permission") or {}).get("threshold")
+    if isinstance(current_weight, int) and isinstance(threshold, int):
+        return current_weight >= threshold
+    approved_list = sign_weight.get("approved_list")
+    if isinstance(approved_list, list):
+        return len(approved_list) > 0
+    return False
diff --git a/python/x402/src/bankofai/x402/mechanisms/tron/exact/server.py b/python/x402/src/bankofai/x402/mechanisms/tron/exact/server.py
index 86c764b0..f33daa40 100644
--- a/python/x402/src/bankofai/x402/mechanisms/tron/exact/server.py
+++ b/python/x402/src/bankofai/x402/mechanisms/tron/exact/server.py
@@ -1,61 +1,33 @@
-"""TRON server scheme for ExactTronScheme (v2 Python SDK).
-
-Parses prices and enhances payment requirements with TIP-712 domain info.
-"""
+"""TRON server implementation for the Exact payment scheme (V2)."""
 
+import re
 from collections.abc import Callable
-from typing import Any
 
 from ....schemas import AssetAmount, Network, PaymentRequirements, Price, SupportedKind
-from ..constants import SCHEME_EXACT, TRON_DEFAULT_ASSETS
-
+from ..constants import SCHEME_EXACT
+from ..utils import get_asset_info, get_network_config
 
-class ExactTronServerScheme:
-    """TRON server implementation for the Exact payment scheme.
+MoneyParser = Callable[[float, str], AssetAmount | None]
 
-    Handles price parsing (USD/Money → TRC-20 atomic amount) and
-    enhances payment requirements with TIP-712 domain parameters.
 
-    Attributes:
-        scheme: Always "exact".
-    """
+class ExactTronServerScheme:
+    """TRON server implementation for the Exact payment scheme (V2)."""
 
     scheme = SCHEME_EXACT
 
-    def __init__(self) -> None:
-        """Create ExactTronServerScheme."""
-        self._money_parsers: list[Callable[[float, str], AssetAmount | None]] = []
-
-    def register_money_parser(
-        self, parser: Callable[[float, str], AssetAmount | None]
-    ) -> "ExactTronServerScheme":
-        """Register a custom money parser.
-
-        Args:
-            parser: Callable(decimal_amount, network_str) → AssetAmount | None.
+    def __init__(self):
+        self._money_parsers: list[MoneyParser] = []
 
-        Returns:
-            Self for chaining.
-        """
+    def register_money_parser(self, parser: MoneyParser) -> "ExactTronServerScheme":
         self._money_parsers.append(parser)
         return self
 
     def parse_price(self, price: Price, network: Network) -> AssetAmount:
-        """Parse a price into an asset amount.
-
-        Args:
-            price: Price to parse (USD string, number, or AssetAmount dict).
-            network: TRON network identifier.
-
-        Returns:
-            AssetAmount with amount, asset, and optional extra fields.
-        """
-        # Already an AssetAmount dict
         if isinstance(price, dict) and "amount" in price:
             if not price.get("asset"):
                 raise ValueError(f"Asset address required for AssetAmount on {network}")
             return AssetAmount(
-                amount=str(price["amount"]),
+                amount=price["amount"],
                 asset=price["asset"],
                 extra=price.get("extra", {}),
             )
@@ -65,16 +37,12 @@ def parse_price(self, price: Price, network: Network) -> AssetAmount:
                 raise ValueError(f"Asset address required for AssetAmount on {network}")
             return price
 
-        # Parse Money to decimal
-        decimal_amount = self._parse_money_to_decimal(price)
-
-        # Try custom parsers
+        decimal_amount = _parse_money_to_decimal(price)
         for parser in self._money_parsers:
             result = parser(decimal_amount, str(network))
             if result is not None:
                 return result
 
-        # Default: USDT on this network
         return self._default_money_conversion(decimal_amount, str(network))
 
     def enhance_payment_requirements(
@@ -83,76 +51,56 @@ def enhance_payment_requirements(
         supported_kind: SupportedKind,
         extension_keys: list[str],
     ) -> PaymentRequirements:
-        """Add TIP-712 domain parameters and default asset to requirements.
+        config = get_network_config(str(requirements.network))
 
-        Args:
-            requirements: Base payment requirements.
-            supported_kind: Supported kind from facilitator.
-            extension_keys: Extension keys (unused).
+        if not requirements.asset:
+            default = config.get("default_asset")
+            if not default or not default.get("address"):
+                raise ValueError(
+                    f"No default stablecoin configured for network {requirements.network}"
+                )
+            requirements.asset = default["address"]
 
-        Returns:
-            Enhanced payment requirements.
-        """
-        network_str = str(requirements.network)
-        asset_info = TRON_DEFAULT_ASSETS.get(network_str)
-
-        # Default asset
-        if not requirements.asset and asset_info:
-            requirements.asset = asset_info["address"]
-
-        # Convert decimal amount to atomic units if needed
-        if asset_info and "." in requirements.amount:
-            decimals = asset_info["decimals"]
-            requirements.amount = str(int(float(requirements.amount) * (10**decimals)))
+        try:
+            asset_info = get_asset_info(str(requirements.network), requirements.asset)
+        except ValueError:
+            asset_info = None
 
-        # Add TIP-712 domain params
         if requirements.extra is None:
             requirements.extra = {}
-        if asset_info:
+
+        if asset_info is not None:
             if "name" not in requirements.extra:
                 requirements.extra["name"] = asset_info["name"]
             if "version" not in requirements.extra:
                 requirements.extra["version"] = asset_info["version"]
-
-        facilitator_extra = supported_kind.extra or {}
-        if "assetTransferMethod" not in requirements.extra and facilitator_extra.get(
-            "supportedAssetTransferMethods"
-        ):
-            supported_methods = facilitator_extra["supportedAssetTransferMethods"]
-            if "permit2" in supported_methods:
-                requirements.extra["assetTransferMethod"] = "permit2"
-            elif "eip3009" in supported_methods:
-                requirements.extra["assetTransferMethod"] = "eip3009"
-
-        if (
-            requirements.extra.get("assetTransferMethod") == "permit2"
-            and "permit2FacilitatorAddress" not in requirements.extra
-            and facilitator_extra.get("permit2FacilitatorAddress")
-        ):
-            requirements.extra["permit2FacilitatorAddress"] = facilitator_extra[
-                "permit2FacilitatorAddress"
-            ]
+            atm = asset_info.get("asset_transfer_method")
+            if "assetTransferMethod" not in requirements.extra and atm:
+                requirements.extra["assetTransferMethod"] = atm
 
         return requirements
 
-    def _parse_money_to_decimal(self, money: Any) -> float:
-        """Parse USD string ('$1.50', '1.50') or number to decimal float."""
-        if isinstance(money, (int, float)):
-            return float(money)
-        clean = str(money).lstrip("$").strip()
-        try:
-            return float(clean)
-        except ValueError:
-            raise ValueError(f"Invalid money format: {money}") from None
-
     def _default_money_conversion(self, amount: float, network: str) -> AssetAmount:
-        """Convert decimal USD amount to USDT AssetAmount on this network."""
-        asset_info = TRON_DEFAULT_ASSETS.get(network)
-        if not asset_info:
-            raise ValueError(f"No default asset configured for TRON network {network}")
-        token_amount = int(amount * (10 ** asset_info["decimals"]))
-        return AssetAmount(
-            amount=str(token_amount),
-            asset=asset_info["address"],
-            extra={"name": asset_info["name"], "version": asset_info["version"]},
-        )
+        config = get_network_config(network)
+        asset = config.get("default_asset")
+        if not asset or not asset.get("address"):
+            raise ValueError(f"No default stablecoin configured for network {network}")
+
+        token_amount = int(amount * (10 ** asset["decimals"]))
+        extra: dict = {"name": asset["name"], "version": asset["version"]}
+        atm = asset.get("asset_transfer_method")
+        if atm:
+            extra["assetTransferMethod"] = atm
+
+        return AssetAmount(amount=str(token_amount), asset=asset["address"], extra=extra)
+
+
+def _parse_money_to_decimal(money: str | float | int) -> float:
+    if isinstance(money, int | float):
+        return float(money)
+
+    clean = str(money).strip()
+    clean = clean.lstrip("$")
+    clean = re.sub(r"\s*(USD|USDT|usd|usdt)\s*$", "", clean)
+    clean = clean.strip()
+    return float(clean)
diff --git a/python/x402/src/bankofai/x402/mechanisms/tron/exact/trc20approval.py b/python/x402/src/bankofai/x402/mechanisms/tron/exact/trc20approval.py
new file mode 100644
index 00000000..4cc550e9
--- /dev/null
+++ b/python/x402/src/bankofai/x402/mechanisms/tron/exact/trc20approval.py
@@ -0,0 +1,51 @@
+"""TRON client helper for sponsored TRC-20 Permit2 approvals."""
+
+from __future__ import annotations
+
+from typing import Any
+
+from ....extensions.trc20_approval_gas_sponsoring import (
+    TRC20_APPROVAL_GAS_SPONSORING_VERSION,
+)
+from ..constants import DEFAULT_FEE_LIMIT_SUN, PERMIT2_ADDRESSES
+
+MAX_UINT256 = (1 << 256) - 1
+
+
+def sign_trc20_approval_transaction(
+    signer: Any, token_address: str, network: str
+) -> dict[str, Any]:
+    if not hasattr(signer, "build_trigger_smart_contract_transaction") or not hasattr(
+        signer, "sign_transaction"
+    ):
+        raise ValueError("TRON signer does not support approval transaction signing")
+
+    spender = PERMIT2_ADDRESSES.get(network)
+    if not spender:
+        raise ValueError(f"No Permit2 contract address configured for network {network}")
+
+    unsigned_tx = signer.build_trigger_smart_contract_transaction(
+        contract_address=token_address,
+        function_selector="approve(address,uint256)",
+        parameters=[
+            {"type": "address", "value": spender},
+            {"type": "uint256", "value": MAX_UINT256},
+        ],
+        fee_limit=DEFAULT_FEE_LIMIT_SUN,
+        call_value=0,
+        owner_address=signer.address,
+    )
+
+    signed_tx = signer.sign_transaction(unsigned_tx)
+    signatures = signed_tx.get("signature") if isinstance(signed_tx, dict) else None
+    if not signatures:
+        raise ValueError("Failed to sign TRON approval transaction")
+
+    return {
+        "from": signer.address,
+        "asset": token_address,
+        "spender": spender,
+        "amount": str(MAX_UINT256),
+        "signedTransaction": signed_tx,
+        "version": TRC20_APPROVAL_GAS_SPONSORING_VERSION,
+    }
diff --git a/python/x402/src/bankofai/x402/mechanisms/tron/signer.py b/python/x402/src/bankofai/x402/mechanisms/tron/signer.py
new file mode 100644
index 00000000..51e21a7f
--- /dev/null
+++ b/python/x402/src/bankofai/x402/mechanisms/tron/signer.py
@@ -0,0 +1,75 @@
+"""TRON signer protocol definitions."""
+
+from typing import Any, Protocol
+
+
+class ClientTronSigner(Protocol):
+    """Client-side TRON signer for payment authorizations."""
+
+    @property
+    def address(self) -> str: ...
+
+    def sign_typed_data(
+        self,
+        domain: dict[str, Any],
+        types: dict[str, list[dict[str, str]]],
+        primary_type: str,
+        message: dict[str, Any],
+    ) -> str: ...
+
+    def read_contract(
+        self,
+        address: str,
+        function_name: str,
+        args: list[Any] | None = None,
+    ) -> Any: ...
+
+    def build_trigger_smart_contract_transaction(self, **kwargs: Any) -> Any: ...
+
+    def sign_transaction(self, transaction: Any) -> Any: ...
+
+
+class FacilitatorTronSigner(Protocol):
+    """Facilitator-side TRON signer for verification and settlement."""
+
+    def get_addresses(self) -> list[str]: ...
+
+    def read_contract(
+        self,
+        address: str,
+        function_name: str,
+        args: list[Any] | None = None,
+    ) -> Any: ...
+
+    def verify_typed_data(
+        self,
+        address: str,
+        domain: dict[str, Any],
+        types: dict[str, list[dict[str, str]]],
+        primary_type: str,
+        message: dict[str, Any],
+        signature: str,
+    ) -> bool: ...
+
+    def write_contract(
+        self,
+        address: str,
+        function_name: str,
+        args: list[Any],
+        fee_limit: int = 1_000_000_000,
+    ) -> str: ...
+
+    def write_contract_with_abi(
+        self,
+        address: str,
+        function_name: str,
+        args: list[Any],
+        abi: list[dict[str, Any]],
+        fee_limit: int = 1_000_000_000,
+    ) -> str: ...
+
+    def wait_for_transaction_receipt(self, tx_hash: str): ...
+
+    def send_raw_transaction(self, signed_transaction: dict[str, Any]) -> str: ...
+
+    def get_sign_weight(self, transaction: Any) -> Any: ...
diff --git a/python/x402/src/bankofai/x402/mechanisms/tron/signers.py b/python/x402/src/bankofai/x402/mechanisms/tron/signers.py
index bd72be55..c7bbb7a7 100644
--- a/python/x402/src/bankofai/x402/mechanisms/tron/signers.py
+++ b/python/x402/src/bankofai/x402/mechanisms/tron/signers.py
@@ -197,45 +197,10 @@ def write_contract_with_abi(
         Returns:
             Transaction hash string (txid).
         """
-        # For ABIEncoderV2 contracts, we need to manually encode the function call
-        # and use triggersmartcontract directly
-        from tronpy.abi import trx_abi
-
-        # Find the function ABI
-        func_abi = None
-        for item in abi:
-            if item.get("name") == function_name and item.get("type") == "function":
-                func_abi = item
-                break
-
-        if not func_abi:
-            raise ValueError(f"Function {function_name} not found in ABI")
-
-        def _get_type_string(param: dict[str, Any]) -> str:
-            if param.get("type", "").startswith("tuple"):
-                components = param.get("components", [])
-                inner = ",".join(_get_type_string(c) for c in components)
-                # handle tuple[] or tuple[2]
-                suffix = param["type"][5:]
-                return f"({inner}){suffix}"
-            return str(param["type"])
-
-        # Format function signature like: settle(((address,uint256),uint256,uint256),address,(address,address,uint256),bytes)
-        type_strings = [_get_type_string(inp) for inp in func_abi.get("inputs", [])]
-        signature = f"({','.join(type_strings)})"
-        func_selector = f"{function_name}{signature}"
-
-        # Encode the function call args
-        parameter = trx_abi.encode_single(signature, tuple(args)).hex()
-
-        # Build transaction using triggersmartcontract
-        txn = self._client.trx.trigger_smart_contract(
-            owner_address=self._address,
-            contract_address=address,
-            function_selector=func_selector,
-            parameter=parameter,
-            fee_limit=fee_limit,
-        )
+        contract = self._client.get_contract(address)
+        contract.abi = abi
+        func = getattr(contract.functions, function_name)
+        txn = func(*args).with_owner(self._address).fee_limit(fee_limit).build()
 
         # Sign and broadcast
         signed_txn = txn.sign(self._pk)
@@ -243,7 +208,7 @@ def _get_type_string(param: dict[str, Any]) -> str:
         return str(result.txid)
 
     def wait_for_transaction_receipt(
-        self, tx_hash: str, max_attempts: int = 30
+        self, tx_hash: str, max_attempts: int = 120
     ) -> TronTransactionReceipt:
         """Poll until the transaction is confirmed."""
         for _ in range(max_attempts):
@@ -259,6 +224,24 @@ def wait_for_transaction_receipt(
             time.sleep(1)
         return TronTransactionReceipt(status="pending", tx_hash=tx_hash)
 
+    def send_raw_transaction(self, signed_transaction: dict[str, Any]) -> str:
+        """Broadcast a signed transaction."""
+        from tronpy.tron import Transaction
+
+        tx: Any = signed_transaction
+        if isinstance(signed_transaction, dict):
+            tx = Transaction.from_json(signed_transaction, client=self._client)
+        result = tx.broadcast()
+        return str(result.txid)
+
+    def get_sign_weight(self, transaction: Any) -> Any:
+        """Ask the node to validate the signed transaction signatures."""
+        from tronpy.tron import Transaction
+
+        if isinstance(transaction, dict):
+            transaction = Transaction.from_json(transaction, client=self._client)
+        return self._client.get_sign_weight(transaction)
+
 
 # ---------------------------------------------------------------------------
 # Client signer
@@ -317,3 +300,60 @@ def read_contract(
         contract = self._client.get_contract(address)
         func = getattr(contract.functions, function_name)
         return func(*(args or []))
+
+    def build_trigger_smart_contract_transaction(self, **kwargs: Any) -> Any:
+        """Build a trigger smart contract transaction."""
+        contract_address = kwargs.get("contract_address")
+        function_selector = kwargs.get("function_selector")
+        parameters = kwargs.get("parameters") or []
+        owner_address = kwargs.get("owner_address") or self._address
+        fee_limit = kwargs.get("fee_limit")
+        call_value = kwargs.get("call_value", 0)
+
+        if not contract_address or not function_selector:
+            raise AttributeError("TRON client does not support trigger smart contract transactions")
+
+        method_name = str(function_selector).split("(", 1)[0]
+        contract = self._client.get_contract(contract_address)
+        func = getattr(contract.functions, method_name, None)
+        if func is None:
+            raise AttributeError("TRON client does not support trigger smart contract transactions")
+
+        args: list[Any] = []
+        for param in parameters:
+            value = param.get("value")
+            if param.get("type") == "uint256" and isinstance(value, str):
+                try:
+                    value = int(value)
+                except ValueError:
+                    pass
+            args.append(value)
+        txn_builder = func(*args).with_owner(owner_address)
+        if fee_limit is not None:
+            txn_builder = txn_builder.fee_limit(int(fee_limit))
+        if call_value:
+            txn_builder = txn_builder.with_transfer(int(call_value))
+        txn = txn_builder.build()
+        return txn
+
+    def sign_transaction(self, transaction: dict[str, Any]) -> dict[str, Any]:
+        """Sign a raw transaction dict."""
+        if hasattr(transaction, "sign"):
+            signed = transaction.sign(self._pk)
+            try:
+                return signed.to_json()
+            except Exception:
+                return signed  # type: ignore[return-value]
+        if isinstance(transaction, dict):
+            from tronpy.tron import Transaction
+
+            signed = Transaction.from_json(transaction, client=self._client).sign(self._pk)
+            try:
+                return signed.to_json()
+            except Exception:
+                return signed  # type: ignore[return-value]
+        txn = self._client.trx.sign(transaction, self._pk)
+        try:
+            return txn.to_json()
+        except Exception:
+            return dict(txn)
diff --git a/python/x402/src/bankofai/x402/mechanisms/tron/types.py b/python/x402/src/bankofai/x402/mechanisms/tron/types.py
new file mode 100644
index 00000000..042afa9a
--- /dev/null
+++ b/python/x402/src/bankofai/x402/mechanisms/tron/types.py
@@ -0,0 +1,128 @@
+"""TRON-specific payload and data types."""
+
+from dataclasses import dataclass
+from typing import Any
+
+
+@dataclass
+class ExactEIP3009Authorization:
+    """TIP-712 TransferWithAuthorization data."""
+
+    from_address: str
+    to: str
+    value: str
+    valid_after: str
+    valid_before: str
+    nonce: str
+
+
+@dataclass
+class ExactEIP3009Payload:
+    """Exact payment payload for TRON networks."""
+
+    authorization: ExactEIP3009Authorization
+    signature: str | None = None
+
+    def to_dict(self) -> dict[str, Any]:
+        result: dict[str, Any] = {
+            "authorization": {
+                "from": self.authorization.from_address,
+                "to": self.authorization.to,
+                "value": self.authorization.value,
+                "validAfter": self.authorization.valid_after,
+                "validBefore": self.authorization.valid_before,
+                "nonce": self.authorization.nonce,
+            }
+        }
+        if self.signature:
+            result["signature"] = self.signature
+        return result
+
+    @classmethod
+    def from_dict(cls, data: dict[str, Any]) -> "ExactEIP3009Payload":
+        auth = data.get("authorization", {})
+        return cls(
+            authorization=ExactEIP3009Authorization(
+                from_address=auth.get("from", ""),
+                to=auth.get("to", ""),
+                value=auth.get("value", ""),
+                valid_after=auth.get("validAfter", ""),
+                valid_before=auth.get("validBefore", ""),
+                nonce=auth.get("nonce", ""),
+            ),
+            signature=data.get("signature"),
+        )
+
+
+@dataclass
+class Permit2Witness:
+    to: str
+    facilitator: str
+    valid_after: str
+
+
+@dataclass
+class Permit2Authorization:
+    from_address: str
+    permitted_token: str
+    permitted_amount: str
+    spender: str
+    nonce: str
+    deadline: str
+    witness: Permit2Witness
+
+
+@dataclass
+class ExactPermit2Payload:
+    permit2_authorization: Permit2Authorization
+    signature: str
+
+    def to_dict(self) -> dict[str, Any]:
+        return {
+            "signature": self.signature,
+            "permit2Authorization": {
+                "from": self.permit2_authorization.from_address,
+                "permitted": {
+                    "token": self.permit2_authorization.permitted_token,
+                    "amount": self.permit2_authorization.permitted_amount,
+                },
+                "spender": self.permit2_authorization.spender,
+                "nonce": self.permit2_authorization.nonce,
+                "deadline": self.permit2_authorization.deadline,
+                "witness": {
+                    "to": self.permit2_authorization.witness.to,
+                    "facilitator": self.permit2_authorization.witness.facilitator,
+                    "validAfter": self.permit2_authorization.witness.valid_after,
+                },
+            },
+        }
+
+    @classmethod
+    def from_dict(cls, data: dict[str, Any]) -> "ExactPermit2Payload":
+        auth = data.get("permit2Authorization", {})
+        permitted = auth.get("permitted", {})
+        witness = auth.get("witness", {})
+        return cls(
+            permit2_authorization=Permit2Authorization(
+                from_address=auth.get("from", ""),
+                permitted_token=permitted.get("token", ""),
+                permitted_amount=permitted.get("amount", ""),
+                spender=auth.get("spender", ""),
+                nonce=auth.get("nonce", ""),
+                deadline=auth.get("deadline", ""),
+                witness=Permit2Witness(
+                    to=witness.get("to", ""),
+                    facilitator=witness.get("facilitator", ""),
+                    valid_after=witness.get("validAfter", ""),
+                ),
+            ),
+            signature=data.get("signature", ""),
+        )
+
+
+ExactTronPayloadV1 = ExactEIP3009Payload
+ExactTronPayloadV2 = ExactEIP3009Payload | ExactPermit2Payload
+
+
+def is_permit2_payload(data: dict[str, Any]) -> bool:
+    return "permit2Authorization" in data
diff --git a/python/x402/src/bankofai/x402/mechanisms/tron/utils.py b/python/x402/src/bankofai/x402/mechanisms/tron/utils.py
index 5414abd8..545e53ac 100644
--- a/python/x402/src/bankofai/x402/mechanisms/tron/utils.py
+++ b/python/x402/src/bankofai/x402/mechanisms/tron/utils.py
@@ -1,6 +1,8 @@
 """TRON utility functions — address conversion and chain helpers."""
 
-from .constants import TRON_CHAIN_IDS
+import os
+
+from .constants import TRON_CHAIN_IDS, TRON_NETWORK_CONFIGS, AssetInfo, NetworkConfig
 
 
 def get_tron_chain_id(network: str) -> int:
@@ -13,15 +15,32 @@ def get_tron_chain_id(network: str) -> int:
     return chain_id
 
 
+def get_network_config(network: str) -> NetworkConfig:
+    """Get configuration for a TRON network identifier."""
+    if network in TRON_NETWORK_CONFIGS:
+        return TRON_NETWORK_CONFIGS[network]
+    if network.startswith("tron:"):
+        raise ValueError(f"Unknown TRON network: {network}")
+    raise ValueError(f"Unsupported network format: {network} (expected tron:*)")
+
+
+def get_asset_info(network: str, asset_address: str) -> AssetInfo:
+    """Get asset info by address."""
+    config = get_network_config(network)
+    default = config.get("default_asset")
+    if default and default["address"].lower() == asset_address.lower():
+        return default
+    raise ValueError(f"Token {asset_address} is not a registered asset for network {network}.")
+
+
 def tron_address_to_evm(address: str) -> str:
     """Convert TRON Base58Check address to 0x-prefixed EVM hex address."""
-    from tronpy.keys import to_hex_address  # type: ignore # tronpy helper
+    from tronpy.keys import to_hex_address  # type: ignore
 
     if address.startswith("0x"):
         return address.lower()
     if address.startswith("41") and len(address) == 42:
         return f"0x{address[2:].lower()}"
-    # Base58Check → hex via tronpy
     hex_addr = to_hex_address(address)  # returns "41xxxx..."
     return f"0x{hex_addr[2:].lower()}"
 
@@ -37,6 +56,19 @@ def normalize_address_for_signing(address: str) -> str:
     raise ValueError(f"Unrecognized address format: {address}")
 
 
+def normalize_address_for_contract_call(address: str) -> str:
+    """Normalize address to TRON base58 format for tronpy contract calls."""
+    from tronpy.keys import to_base58check_address  # type: ignore
+
+    if address.startswith("T") and len(address) == 34:
+        return address
+    if address.startswith("0x") and len(address) == 42:
+        return to_base58check_address("41" + address[2:])
+    if address.startswith("41") and len(address) == 42:
+        return to_base58check_address(address)
+    raise ValueError(f"Unrecognized address format: {address}")
+
+
 def is_tron_address(address: str) -> bool:
     """Return True if address looks like a TRON Base58Check address."""
     return address.startswith("T") and len(address) == 34
@@ -44,6 +76,4 @@ def is_tron_address(address: str) -> bool:
 
 def create_nonce() -> str:
     """Generate a random 32-byte hex nonce (0x-prefixed)."""
-    import os
-
     return "0x" + os.urandom(32).hex()
diff --git a/python/x402/tests/unit/core/test_client.py b/python/x402/tests/unit/core/test_client.py
index 348715d4..bcb985b4 100644
--- a/python/x402/tests/unit/core/test_client.py
+++ b/python/x402/tests/unit/core/test_client.py
@@ -27,7 +27,7 @@ def __init__(self, scheme: str = "mock"):
         self.scheme = scheme
         self.create_calls: list = []
 
-    def create_payment_payload(self, requirements):
+    def create_payment_payload(self, requirements, context=None):
         self.create_calls.append(requirements)
         return {"mock": "payload", "network": requirements.network}
 
@@ -40,7 +40,7 @@ class MockSchemeClientV1:
     def __init__(self, scheme: str = "mock-v1"):
         self.scheme = scheme
 
-    def create_payment_payload(self, requirements):
+    def create_payment_payload(self, requirements, context=None):
         return {"mock": "v1-payload", "network": requirements.network}
 
 
@@ -487,6 +487,81 @@ def test_auto_adaptive_sync_v1_then_v2(self):
         assert result_v2.x402_version == 2
 
 
+class TestClientExtensionMerging:
+    """Tests for client-side extension merging."""
+
+    @pytest.mark.asyncio
+    async def test_client_merges_scheme_extensions(self):
+        from bankofai.x402.schemas import PaymentPayload, PaymentRequired, PaymentRequirements
+
+        class MockSchemeClientWithExtensions(MockSchemeClient):
+            def create_payment_payload(self, requirements, context=None):
+                return {"mock": "payload"}, {"extA": {"info": {"ok": True}}}
+
+        client = x402Client()
+        client.register("eip155:8453", MockSchemeClientWithExtensions())
+
+        payment_required = PaymentRequired(
+            x402_version=2,
+            accepts=[
+                PaymentRequirements(
+                    scheme="mock",
+                    network="eip155:8453",
+                    asset="0x0000000000000000000000000000000000000000",
+                    amount="1000000",
+                    pay_to="0x1234567890123456789012345678901234567890",
+                    max_timeout_seconds=300,
+                ),
+            ],
+            extensions={"serverExt": {"info": {"server": True}}},
+        )
+
+        result = await client.create_payment_payload(payment_required)
+
+        assert isinstance(result, PaymentPayload)
+        assert result.extensions is not None
+        assert "serverExt" in result.extensions
+        assert "extA" in result.extensions
+
+    @pytest.mark.asyncio
+    async def test_client_passes_context_extensions_to_scheme(self):
+        from bankofai.x402.schemas import PaymentPayload, PaymentRequired, PaymentRequirements
+
+        class MockSchemeClientWithContext(MockSchemeClient):
+            def __init__(self):
+                super().__init__()
+                self.last_context = None
+
+            def create_payment_payload(self, requirements, context=None):
+                self.last_context = context
+                return {"mock": "payload"}
+
+        client = x402Client()
+        mock = MockSchemeClientWithContext()
+        client.register("eip155:8453", mock)
+
+        payment_required = PaymentRequired(
+            x402_version=2,
+            accepts=[
+                PaymentRequirements(
+                    scheme="mock",
+                    network="eip155:8453",
+                    asset="0x0000000000000000000000000000000000000000",
+                    amount="1000000",
+                    pay_to="0x1234567890123456789012345678901234567890",
+                    max_timeout_seconds=300,
+                ),
+            ],
+            extensions={"serverExt": {"info": {"server": True}}},
+        )
+
+        result = await client.create_payment_payload(payment_required)
+
+        assert isinstance(result, PaymentPayload)
+        assert mock.last_context is not None
+        assert mock.last_context.extensions == payment_required.extensions
+
+
 class TestX402ClientV1Hooks:
     """Tests for hook execution on v1 path."""
 
diff --git a/python/x402/tests/unit/extensions/test_eip2612_gas_sponsoring.py b/python/x402/tests/unit/extensions/test_eip2612_gas_sponsoring.py
new file mode 100644
index 00000000..6467965b
--- /dev/null
+++ b/python/x402/tests/unit/extensions/test_eip2612_gas_sponsoring.py
@@ -0,0 +1,34 @@
+"""Tests for EIP-2612 gas sponsoring extension."""
+
+from bankofai.x402.extensions.eip2612_gas_sponsoring import (
+    EIP2612_GAS_SPONSORING,
+    declare_eip2612_gas_sponsoring_extension,
+    extract_eip2612_gas_sponsoring_info,
+    validate_eip2612_gas_sponsoring_info,
+)
+
+
+def test_declare_extension():
+    ext = declare_eip2612_gas_sponsoring_extension()
+    assert EIP2612_GAS_SPONSORING.key in ext
+
+
+def test_extract_and_validate_info():
+    payload_ext = {
+        EIP2612_GAS_SPONSORING.key: {
+            "info": {
+                "from": "0x123",
+                "asset": "0xabc",
+                "spender": "0xdef",
+                "amount": "100",
+                "nonce": "1",
+                "deadline": "999999",
+                "signature": "0x" + "11" * 65,
+                "version": "1",
+            },
+            "schema": {},
+        }
+    }
+    info = extract_eip2612_gas_sponsoring_info(payload_ext)
+    assert info is not None
+    assert validate_eip2612_gas_sponsoring_info(info) is True
diff --git a/python/x402/tests/unit/extensions/test_erc20_approval_gas_sponsoring.py b/python/x402/tests/unit/extensions/test_erc20_approval_gas_sponsoring.py
new file mode 100644
index 00000000..e6ec8578
--- /dev/null
+++ b/python/x402/tests/unit/extensions/test_erc20_approval_gas_sponsoring.py
@@ -0,0 +1,32 @@
+"""Tests for ERC-20 approval gas sponsoring extension."""
+
+from bankofai.x402.extensions.erc20_approval_gas_sponsoring import (
+    ERC20_APPROVAL_GAS_SPONSORING,
+    declare_erc20_approval_gas_sponsoring_extension,
+    extract_erc20_approval_gas_sponsoring_info,
+    validate_erc20_approval_gas_sponsoring_info,
+)
+
+
+def test_declare_extension():
+    ext = declare_erc20_approval_gas_sponsoring_extension()
+    assert ERC20_APPROVAL_GAS_SPONSORING.key in ext
+
+
+def test_extract_and_validate_info():
+    payload_ext = {
+        ERC20_APPROVAL_GAS_SPONSORING.key: {
+            "info": {
+                "from": "0x123",
+                "asset": "0xabc",
+                "spender": "0xdef",
+                "amount": "100",
+                "signedTransaction": "0x" + "11" * 10,
+                "version": "1",
+            },
+            "schema": {},
+        }
+    }
+    info = extract_erc20_approval_gas_sponsoring_info(payload_ext)
+    assert info is not None
+    assert validate_erc20_approval_gas_sponsoring_info(info) is True
diff --git a/python/x402/tests/unit/mechanisms/evm/test_client.py b/python/x402/tests/unit/mechanisms/evm/test_client.py
index 23329eb7..c354e1a3 100644
--- a/python/x402/tests/unit/mechanisms/evm/test_client.py
+++ b/python/x402/tests/unit/mechanisms/evm/test_client.py
@@ -8,6 +8,11 @@
 
     pytest.skip("EVM client requires eth_account", allow_module_level=True)
 
+from bankofai.x402.extensions.eip2612_gas_sponsoring import EIP2612_GAS_SPONSORING
+from bankofai.x402.extensions.erc20_approval_gas_sponsoring import (
+    ERC20_APPROVAL_GAS_SPONSORING,
+)
+from bankofai.x402.interfaces import PaymentPayloadContext
 from bankofai.x402.mechanisms.evm.exact import ExactEvmClientScheme
 from bankofai.x402.mechanisms.evm.signers import EthAccountSigner
 from bankofai.x402.mechanisms.evm.utils import get_asset_info
@@ -75,6 +80,86 @@ def test_should_accept_v2_requirements_with_amount_field(self):
         assert requirements.amount == "500000"
         assert client.scheme == "exact"
 
+    def test_permit2_builds_eip2612_extension(self):
+        class DummySigner:
+            address = "0x1234567890123456789012345678901234567890"
+
+            def sign_typed_data(self, *args, **kwargs):
+                return b"\x01" * 65
+
+            def read_contract(self, address, abi, function_name, *args):
+                if function_name == "allowance":
+                    return 0
+                if function_name == "nonces":
+                    return 1
+                return 0
+
+        client = ExactEvmClientScheme(DummySigner())
+        requirements = PaymentRequirements(
+            scheme="exact",
+            network="eip155:8453",
+            asset="0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
+            amount="1000",
+            pay_to="0x0987654321098765432109876543210987654321",
+            max_timeout_seconds=3600,
+            extra={
+                "name": "USD Coin",
+                "version": "2",
+                "assetTransferMethod": "permit2",
+                "permit2FacilitatorAddress": "0x1111111111111111111111111111111111111111",
+            },
+        )
+
+        context = PaymentPayloadContext(extensions={EIP2612_GAS_SPONSORING.key: {}})
+        result = client.create_payment_payload(requirements, context)
+
+        assert isinstance(result, tuple)
+        payload, extensions = result
+        assert "permit2Authorization" in payload
+        assert EIP2612_GAS_SPONSORING.key in extensions
+
+    def test_permit2_builds_erc20_extension(self):
+        class DummySigner:
+            address = "0x1234567890123456789012345678901234567890"
+
+            def sign_typed_data(self, *args, **kwargs):
+                return b"\x01" * 65
+
+            def read_contract(self, address, abi, function_name, *args):
+                if function_name == "allowance":
+                    return 0
+                return 0
+
+            def sign_transaction(self, tx):
+                return b"\x02" * 10
+
+            def get_transaction_count(self, address):
+                return 1
+
+        client = ExactEvmClientScheme(DummySigner())
+        requirements = PaymentRequirements(
+            scheme="exact",
+            network="eip155:8453",
+            asset="0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
+            amount="1000",
+            pay_to="0x0987654321098765432109876543210987654321",
+            max_timeout_seconds=3600,
+            extra={
+                "name": "USD Coin",
+                "version": "2",
+                "assetTransferMethod": "permit2",
+                "permit2FacilitatorAddress": "0x1111111111111111111111111111111111111111",
+            },
+        )
+
+        context = PaymentPayloadContext(extensions={ERC20_APPROVAL_GAS_SPONSORING.key: {}})
+        result = client.create_payment_payload(requirements, context)
+
+        assert isinstance(result, tuple)
+        payload, extensions = result
+        assert "permit2Authorization" in payload
+        assert ERC20_APPROVAL_GAS_SPONSORING.key in extensions
+
     def test_requirements_must_have_eip712_domain(self):
         """Requirements must have EIP-712 domain in extra."""
         account = Account.create()
@@ -174,8 +259,29 @@ def test_raw_local_account_can_sign_payload(self):
 
         payload = client.create_payment_payload(requirements)
 
-        assert isinstance(payload, dict)
         assert "authorization" in payload
         assert "signature" in payload
-        assert payload["signature"].startswith("0x")
-        assert len(payload["signature"]) > 2  # not just "0x"
+
+    def test_local_account_uses_network_specific_rpc_resolution(self, monkeypatch):
+        account = Account.create()
+        monkeypatch.delenv("EVM_RPC_URL", raising=False)
+        monkeypatch.delenv("WEB3_PROVIDER_URL", raising=False)
+        monkeypatch.setenv("EVM_RPC_URL_84532", "https://example-base-sepolia.local")
+
+        client = ExactEvmClientScheme(signer=account)
+
+        requirements = PaymentRequirements(
+            scheme="exact",
+            network="eip155:84532",
+            asset="0x036CbD53842c5426634e7929541eC2318f3dCF7e",
+            amount="500000",
+            pay_to="0x0987654321098765432109876543210987654321",
+            max_timeout_seconds=3600,
+            extra={"name": "USDC", "version": "2"},
+        )
+        client.create_payment_payload(requirements)
+
+        network_signer = client._network_signers["eip155:84532"]
+        assert isinstance(network_signer, EthAccountSigner)
+        assert network_signer._w3 is not None
+        assert network_signer._w3.provider.endpoint_uri == "https://example-base-sepolia.local"
diff --git a/python/x402/tests/unit/mechanisms/evm/test_facilitator.py b/python/x402/tests/unit/mechanisms/evm/test_facilitator.py
index 2b6868ca..315675d9 100644
--- a/python/x402/tests/unit/mechanisms/evm/test_facilitator.py
+++ b/python/x402/tests/unit/mechanisms/evm/test_facilitator.py
@@ -411,14 +411,14 @@ def test_caip_family_attribute(self):
 
         assert facilitator.caip_family == "eip155:*"
 
-    def test_get_extra_returns_none(self):
-        """get_extra should return None for EVM."""
+    def test_get_extra_returns_permit2_facilitator_address(self):
+        """get_extra should expose Permit2 facilitator metadata for EVM."""
         signer = MockFacilitatorSigner()
         facilitator = ExactEvmFacilitatorScheme(signer)
 
         extra = facilitator.get_extra("eip155:8453")
 
-        assert extra is None
+        assert extra == {"permit2FacilitatorAddress": signer.get_addresses()[0]}
 
     def test_get_signers_returns_signer_addresses(self):
         """get_signers should return list of signer addresses."""
diff --git a/python/x402/tests/unit/mechanisms/evm/test_permit2_extensions.py b/python/x402/tests/unit/mechanisms/evm/test_permit2_extensions.py
new file mode 100644
index 00000000..71b4ef40
--- /dev/null
+++ b/python/x402/tests/unit/mechanisms/evm/test_permit2_extensions.py
@@ -0,0 +1,190 @@
+"""Tests for EVM Permit2 gas sponsoring extensions."""
+
+from eth_abi import encode
+from eth_account import Account
+from eth_utils import keccak
+
+from bankofai.x402.extensions.eip2612_gas_sponsoring import EIP2612_GAS_SPONSORING
+from bankofai.x402.extensions.erc20_approval_gas_sponsoring import (
+    ERC20_APPROVAL_GAS_SPONSORING,
+    Erc20ApprovalGasSponsoringExtension,
+)
+from bankofai.x402.interfaces import FacilitatorContext
+from bankofai.x402.mechanisms.evm import (
+    get_evm_chain_id,
+    get_permit2_address,
+    get_x402_exact_permit2_proxy_address,
+)
+from bankofai.x402.mechanisms.evm.exact.permit2 import verify_permit2
+from bankofai.x402.mechanisms.evm.types import ExactPermit2Payload
+from bankofai.x402.schemas import PaymentPayload, PaymentRequirements
+
+PERMIT2_FACILITATOR_ADDRESS = "0x1111111111111111111111111111111111111111"
+
+
+class DummySigner:
+    def __init__(self, balance: int = 10**9):
+        self._balance = balance
+
+    def get_addresses(self):
+        return ["0xF000000000000000000000000000000000000001"]
+
+    def read_contract(self, address, abi, function_name, *args):
+        if function_name == "allowance":
+            return 0
+        if function_name == "balanceOf":
+            return self._balance
+        return 0
+
+    def verify_typed_data(self, *args, **kwargs):
+        return True
+
+    def write_contract(self, *args, **kwargs):
+        return "0x" + "00" * 32
+
+    def wait_for_transaction_receipt(self, tx_hash):
+        from bankofai.x402.mechanisms.evm.types import TransactionReceipt
+
+        return TransactionReceipt(status=1, block_number=1, tx_hash=tx_hash)
+
+
+def _build_requirements():
+    return PaymentRequirements(
+        scheme="exact",
+        network="eip155:8453",
+        asset="0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
+        amount="1000",
+        pay_to="0x0987654321098765432109876543210987654321",
+        max_timeout_seconds=3600,
+        extra={
+            "name": "USD Coin",
+            "version": "2",
+            "assetTransferMethod": "permit2",
+            "permit2FacilitatorAddress": PERMIT2_FACILITATOR_ADDRESS,
+        },
+    )
+
+
+def _build_permit2_payload(requirements: PaymentRequirements, payer: str) -> dict:
+    return {
+        "signature": "0x" + "11" * 65,
+        "permit2Authorization": {
+            "from": payer,
+            "permitted": {"token": requirements.asset, "amount": requirements.amount},
+            "spender": get_x402_exact_permit2_proxy_address(str(requirements.network)),
+            "nonce": "1",
+            "deadline": str(9999999999),
+            "witness": {
+                "to": requirements.pay_to,
+                "facilitator": requirements.extra["permit2FacilitatorAddress"],
+                "validAfter": "0",
+            },
+        },
+    }
+
+
+def _build_signed_erc20_approval_tx(
+    private_key: str, token: str, spender: str, chain_id: int
+) -> str:
+    account = Account.from_key(private_key)
+    selector = keccak(text="approve(address,uint256)")[:4]
+    calldata = selector + encode(["address", "uint256"], [spender, 2**256 - 1])
+    signed = account.sign_transaction(
+        {
+            "to": token,
+            "data": "0x" + calldata.hex(),
+            "value": 0,
+            "nonce": 1,
+            "gas": 100000,
+            "maxFeePerGas": 1_000_000_000,
+            "maxPriorityFeePerGas": 100_000_000,
+            "chainId": chain_id,
+        }
+    )
+    raw = getattr(signed, "raw_transaction", None) or getattr(signed, "rawTransaction", None)
+    return "0x" + bytes(raw).hex()
+
+
+def test_verify_permit2_accepts_eip2612_extension():
+    requirements = _build_requirements()
+    payload_dict = _build_permit2_payload(
+        requirements, payer="0x1234567890123456789012345678901234567890"
+    )
+
+    payload = PaymentPayload(
+        x402_version=2,
+        accepted=requirements,
+        payload=payload_dict,
+        extensions={
+            EIP2612_GAS_SPONSORING.key: {
+                "info": {
+                    "from": "0x1234567890123456789012345678901234567890",
+                    "asset": requirements.asset,
+                    "spender": get_permit2_address(str(requirements.network)),
+                    "amount": requirements.amount,
+                    "nonce": "1",
+                    "deadline": str(9999999999),
+                    "signature": "0x" + "11" * 65,
+                    "version": "1",
+                },
+                "schema": {},
+            }
+        },
+    )
+
+    result = verify_permit2(
+        DummySigner(),
+        payload,
+        requirements,
+        ExactPermit2Payload.from_dict(payload_dict),
+    )
+    assert result.is_valid is True
+
+
+def test_verify_permit2_accepts_erc20_extension_with_context():
+    requirements = _build_requirements()
+    payer_key = "0x59c6995e998f97a5a0044976f7ad0dc2f1b362f8c6f7f3d9f9a6b8b63f7f3f4f"
+    payer = Account.from_key(payer_key).address
+    payload_dict = _build_permit2_payload(requirements, payer=payer)
+    signed_tx = _build_signed_erc20_approval_tx(
+        payer_key,
+        requirements.asset,
+        get_permit2_address(str(requirements.network)),
+        get_evm_chain_id(str(requirements.network)),
+    )
+
+    payload = PaymentPayload(
+        x402_version=2,
+        accepted=requirements,
+        payload=payload_dict,
+        extensions={
+            ERC20_APPROVAL_GAS_SPONSORING.key: {
+                "info": {
+                    "from": payer,
+                    "asset": requirements.asset,
+                    "spender": get_permit2_address(str(requirements.network)),
+                    "amount": requirements.amount,
+                    "signedTransaction": signed_tx,
+                    "version": "1",
+                },
+                "schema": {},
+            }
+        },
+    )
+
+    context = FacilitatorContext(
+        {
+            ERC20_APPROVAL_GAS_SPONSORING.key: Erc20ApprovalGasSponsoringExtension(
+                key=ERC20_APPROVAL_GAS_SPONSORING.key
+            )
+        }
+    )
+
+    result = verify_permit2(
+        DummySigner(),
+        payload,
+        requirements,
+        ExactPermit2Payload.from_dict(payload_dict),
+        context,
+    )
+    assert result.is_valid is True
diff --git a/python/x402/tests/unit/mechanisms/evm/test_signer.py b/python/x402/tests/unit/mechanisms/evm/test_signer.py
index 303507ba..a1b0640d 100644
--- a/python/x402/tests/unit/mechanisms/evm/test_signer.py
+++ b/python/x402/tests/unit/mechanisms/evm/test_signer.py
@@ -69,6 +69,50 @@ def test_should_sign_typed_data(self):
         assert isinstance(signature, bytes)
         assert len(signature) >= 65  # ECDSA signature is 65 bytes
 
+    def test_should_sign_transaction(self):
+        account = Account.create()
+        signer = EthAccountSigner(account)
+        tx = {
+            "to": account.address,
+            "value": 0,
+            "nonce": 0,
+            "gas": 21000,
+            "maxFeePerGas": 1,
+            "maxPriorityFeePerGas": 1,
+            "chainId": 1,
+        }
+        signed = signer.sign_transaction(tx)
+        assert isinstance(signed, (bytes, bytearray))
+        assert len(signed) > 0
+
+    def test_should_use_env_rpc_url_default(self, monkeypatch):
+        account = Account.create()
+        monkeypatch.setenv("EVM_RPC_URL", "https://bsc-testnet-rpc.publicnode.com")
+        signer = EthAccountSigner(account)
+        assert signer._w3 is not None
+
+    def test_should_use_chain_specific_env_rpc_url(self, monkeypatch):
+        account = Account.create()
+        monkeypatch.delenv("EVM_RPC_URL", raising=False)
+        monkeypatch.delenv("WEB3_PROVIDER_URL", raising=False)
+        monkeypatch.setenv("EVM_RPC_URL_97", "https://example-bsc.local")
+
+        signer = EthAccountSigner(account, network="eip155:97")
+
+        assert signer._w3 is not None
+        assert signer._w3.provider.endpoint_uri == "https://example-bsc.local"
+
+    def test_should_use_network_default_rpc_url(self, monkeypatch):
+        account = Account.create()
+        monkeypatch.delenv("EVM_RPC_URL", raising=False)
+        monkeypatch.delenv("WEB3_PROVIDER_URL", raising=False)
+        monkeypatch.delenv("EVM_RPC_URL_84532", raising=False)
+
+        signer = EthAccountSigner(account, network="eip155:84532")
+
+        assert signer._w3 is not None
+        assert signer._w3.provider.endpoint_uri == "https://sepolia.base.org"
+
 
 class TestFacilitatorWeb3Signer:
     """Test FacilitatorWeb3Signer facilitator-side signer."""
diff --git a/python/x402/tests/unit/mechanisms/evm/test_types.py b/python/x402/tests/unit/mechanisms/evm/test_types.py
index d3b764ba..02ff6d91 100644
--- a/python/x402/tests/unit/mechanisms/evm/test_types.py
+++ b/python/x402/tests/unit/mechanisms/evm/test_types.py
@@ -1,10 +1,13 @@
 """Tests for EVM payload types."""
 
+from typing import get_args
+
 from bankofai.x402.mechanisms.evm import (
     ExactEIP3009Authorization,
     ExactEIP3009Payload,
     ExactEvmPayloadV1,
     ExactEvmPayloadV2,
+    ExactPermit2Payload,
 )
 
 
@@ -178,10 +181,12 @@ def test_v1_should_be_alias_of_eip3009_payload(self):
         """V1 should be alias of ExactEIP3009Payload."""
         assert ExactEvmPayloadV1 is ExactEIP3009Payload
 
-    def test_v2_should_be_alias_of_eip3009_payload(self):
-        """V2 should be alias of ExactEIP3009Payload."""
-        assert ExactEvmPayloadV2 is ExactEIP3009Payload
+    def test_v2_should_include_eip3009_and_permit2_payloads(self):
+        """V2 should support both EIP-3009 and Permit2 payload variants."""
+        args = get_args(ExactEvmPayloadV2)
+        assert ExactEIP3009Payload in args
+        assert ExactPermit2Payload in args
 
-    def test_v1_and_v2_should_be_same(self):
-        """V1 and V2 should be the same type."""
-        assert ExactEvmPayloadV1 is ExactEvmPayloadV2
+    def test_v1_and_v2_should_differ(self):
+        """V1 remains EIP-3009-only while V2 is a discriminated union."""
+        assert ExactEvmPayloadV1 is not ExactEvmPayloadV2
diff --git a/python/x402/tests/unit/mechanisms/tron/__init__.py b/python/x402/tests/unit/mechanisms/tron/__init__.py
new file mode 100644
index 00000000..31f66dc1
--- /dev/null
+++ b/python/x402/tests/unit/mechanisms/tron/__init__.py
@@ -0,0 +1 @@
+"""Unit tests for TRON mechanisms."""
diff --git a/python/x402/tests/unit/mechanisms/tron/test_client.py b/python/x402/tests/unit/mechanisms/tron/test_client.py
new file mode 100644
index 00000000..f861b3d0
--- /dev/null
+++ b/python/x402/tests/unit/mechanisms/tron/test_client.py
@@ -0,0 +1,94 @@
+"""Tests for TRON Exact client scheme."""
+
+import pytest
+
+from bankofai.x402.extensions.trc20_approval_gas_sponsoring import TRC20_APPROVAL_GAS_SPONSORING
+from bankofai.x402.interfaces import PaymentPayloadContext
+from bankofai.x402.mechanisms.tron.exact import ExactTronClientScheme
+from bankofai.x402.schemas import PaymentRequirements
+
+
+class DummySigner:
+    address = "0x" + "11" * 20
+
+    def sign_typed_data(self, *args, **kwargs):
+        return "0x" + "aa" * 65
+
+    def read_contract(self, address: str, function_name: str, args=None):
+        if function_name == "allowance":
+            return 0
+        return 0
+
+    def build_trigger_smart_contract_transaction(self, **kwargs):
+        return {"raw_data": {"contract": [{"parameter": {"value": {}}}]}}
+
+    def sign_transaction(self, transaction):
+        return {"raw_data": transaction.get("raw_data", {}), "signature": ["0x01"]}
+
+
+def _base_requirements(extra: dict | None = None) -> PaymentRequirements:
+    return PaymentRequirements(
+        scheme="exact",
+        network="tron:nile",
+        asset="0x" + "22" * 20,
+        amount="1000",
+        pay_to="0x" + "33" * 20,
+        max_timeout_seconds=3600,
+        extra=extra or {},
+    )
+
+
+def test_create_eip3009_payload():
+    client = ExactTronClientScheme(DummySigner())
+    requirements = _base_requirements(extra={"name": "USDT", "version": "1"})
+    payload = client.create_payment_payload(requirements)
+    assert "authorization" in payload
+    assert payload["authorization"]["from"] == DummySigner.address
+    assert payload["authorization"]["to"] == requirements.pay_to
+    assert payload["signature"].startswith("0x")
+
+
+def test_create_permit2_payload(monkeypatch):
+    import bankofai.x402.mechanisms.tron.exact.client as tron_client
+
+    monkeypatch.setitem(tron_client.PERMIT2_ADDRESSES, "tron:nile", "0x" + "44" * 20)
+    monkeypatch.setitem(tron_client.X402_PERMIT2_PROXY_ADDRESSES, "tron:nile", "0x" + "55" * 20)
+
+    client = ExactTronClientScheme(DummySigner())
+    requirements = _base_requirements(
+        extra={
+            "assetTransferMethod": "permit2",
+            "permit2FacilitatorAddress": "0x" + "66" * 20,
+        }
+    )
+
+    payload = client.create_payment_payload(requirements)
+    assert "permit2Authorization" in payload
+    assert payload["permit2Authorization"]["spender"] == "0x" + "55" * 20
+
+
+def test_create_permit2_payload_with_trc20_extension(monkeypatch):
+    import bankofai.x402.mechanisms.tron.exact.client as tron_client
+
+    monkeypatch.setitem(tron_client.PERMIT2_ADDRESSES, "tron:nile", "0x" + "44" * 20)
+    monkeypatch.setitem(tron_client.X402_PERMIT2_PROXY_ADDRESSES, "tron:nile", "0x" + "55" * 20)
+
+    client = ExactTronClientScheme(DummySigner())
+    requirements = _base_requirements(
+        extra={
+            "assetTransferMethod": "permit2",
+            "permit2FacilitatorAddress": "0x" + "66" * 20,
+        }
+    )
+    context = PaymentPayloadContext(extensions={TRC20_APPROVAL_GAS_SPONSORING.key: {}})
+
+    payload, extensions = client.create_payment_payload(requirements, context)
+    assert "permit2Authorization" in payload
+    assert TRC20_APPROVAL_GAS_SPONSORING.key in extensions
+
+
+def test_create_payload_requires_tip712_domain():
+    client = ExactTronClientScheme(DummySigner())
+    requirements = _base_requirements(extra={})
+    with pytest.raises(ValueError, match="TIP-712 domain"):
+        client.create_payment_payload(requirements)
diff --git a/python/x402/tests/unit/mechanisms/tron/test_eip3009.py b/python/x402/tests/unit/mechanisms/tron/test_eip3009.py
new file mode 100644
index 00000000..b2753911
--- /dev/null
+++ b/python/x402/tests/unit/mechanisms/tron/test_eip3009.py
@@ -0,0 +1,106 @@
+"""Tests for TRON EIP-3009 facilitator logic."""
+
+import time
+
+from bankofai.x402.mechanisms.tron.constants import ERR_INVALID_SIGNATURE
+from bankofai.x402.mechanisms.tron.exact.eip3009 import settle_eip3009, verify_eip3009
+from bankofai.x402.schemas import PaymentPayload, PaymentRequirements
+
+
+class DummySigner:
+    def __init__(self, valid_signature: bool = True):
+        self._valid_signature = valid_signature
+
+    def verify_typed_data(self, *args, **kwargs):
+        return self._valid_signature
+
+    def read_contract(self, *args, **kwargs):
+        return 10**12
+
+    def write_contract(self, *args, **kwargs):
+        return "0x" + "00" * 32
+
+    def wait_for_transaction_receipt(self, tx_hash: str):
+        class Receipt:
+            status = "success"
+
+        return Receipt()
+
+
+class Base58WriteSigner(DummySigner):
+    def read_contract(self, address, function_name, args=None):
+        args = args or []
+        for arg in args:
+            if isinstance(arg, str):
+                assert arg.startswith("T") and len(arg) == 34
+        return super().read_contract(address, function_name, args)
+
+    def write_contract(self, address, function_name, args, fee_limit=1_000_000_000):
+        for arg in args[:2]:
+            if isinstance(arg, str):
+                assert arg.startswith("T") and len(arg) == 34
+        return super().write_contract(address, function_name, args, fee_limit)
+
+
+def _requirements() -> PaymentRequirements:
+    return PaymentRequirements(
+        scheme="exact",
+        network="tron:nile",
+        asset="0x" + "11" * 20,
+        amount="1000",
+        pay_to="0x" + "22" * 20,
+        max_timeout_seconds=3600,
+        extra={"name": "USDT", "version": "1"},
+    )
+
+
+def _raw_payload(req: PaymentRequirements) -> dict:
+    now = int(time.time())
+    return {
+        "authorization": {
+            "from": "0x" + "33" * 20,
+            "to": req.pay_to,
+            "value": req.amount,
+            "validAfter": str(now - 600),
+            "validBefore": str(now + 3600),
+            "nonce": "0x" + "11" * 32,
+        },
+        "signature": "0x" + "aa" * 65,
+    }
+
+
+def test_verify_eip3009_valid():
+    req = _requirements()
+    raw = _raw_payload(req)
+    payload = PaymentPayload(x402_version=2, payload=raw, accepted=req)
+    result = verify_eip3009(DummySigner(valid_signature=True), payload, req, raw)
+    assert result.is_valid is True
+
+
+def test_verify_eip3009_invalid_signature():
+    req = _requirements()
+    raw = _raw_payload(req)
+    payload = PaymentPayload(x402_version=2, payload=raw, accepted=req)
+    result = verify_eip3009(DummySigner(valid_signature=False), payload, req, raw)
+    assert result.is_valid is False
+    assert result.invalid_reason == ERR_INVALID_SIGNATURE
+
+
+def test_settle_eip3009_success():
+    req = _requirements()
+    raw = _raw_payload(req)
+    payload = PaymentPayload(x402_version=2, payload=raw, accepted=req)
+    result = settle_eip3009(DummySigner(valid_signature=True), payload, req, raw)
+    assert result.success is True
+
+
+def test_eip3009_uses_base58_addresses_for_contract_calls():
+    req = _requirements()
+    raw = _raw_payload(req)
+    payload = PaymentPayload(x402_version=2, payload=raw, accepted=req)
+
+    verify_result = verify_eip3009(Base58WriteSigner(valid_signature=True), payload, req, raw)
+    assert verify_result.is_valid is True
+
+    settle_result = settle_eip3009(Base58WriteSigner(valid_signature=True), payload, req, raw)
+    assert settle_result.success is True
diff --git a/python/x402/tests/unit/mechanisms/tron/test_facilitator.py b/python/x402/tests/unit/mechanisms/tron/test_facilitator.py
new file mode 100644
index 00000000..51454564
--- /dev/null
+++ b/python/x402/tests/unit/mechanisms/tron/test_facilitator.py
@@ -0,0 +1,79 @@
+"""Tests for TRON facilitator scheme."""
+
+import time
+
+from bankofai.x402.mechanisms.tron.exact import ExactTronFacilitatorScheme
+from bankofai.x402.schemas import PaymentPayload, PaymentRequirements
+
+
+class DummySigner:
+    def __init__(self):
+        self._address = "0x" + "aa" * 20
+
+    def get_addresses(self):
+        return [self._address]
+
+    def verify_typed_data(self, *args, **kwargs):
+        return True
+
+    def read_contract(self, *args, **kwargs):
+        return 10**12
+
+    def write_contract(self, *args, **kwargs):
+        return "0x" + "00" * 32
+
+    def wait_for_transaction_receipt(self, tx_hash: str):
+        class Receipt:
+            status = "success"
+
+        return Receipt()
+
+
+def _requirements() -> PaymentRequirements:
+    return PaymentRequirements(
+        scheme="exact",
+        network="tron:nile",
+        asset="0x" + "11" * 20,
+        amount="1000",
+        pay_to="0x" + "22" * 20,
+        max_timeout_seconds=3600,
+        extra={"name": "USDT", "version": "1"},
+    )
+
+
+def _payload(req: PaymentRequirements) -> PaymentPayload:
+    now = int(time.time())
+    raw = {
+        "authorization": {
+            "from": "0x" + "33" * 20,
+            "to": req.pay_to,
+            "value": req.amount,
+            "validAfter": str(now - 600),
+            "validBefore": str(now + 3600),
+            "nonce": "0x" + "11" * 32,
+        },
+        "signature": "0x" + "aa" * 65,
+    }
+    return PaymentPayload(x402_version=2, payload=raw, accepted=req)
+
+
+def test_get_extra_returns_facilitator_address():
+    scheme = ExactTronFacilitatorScheme(DummySigner())
+    extra = scheme.get_extra("tron:nile")
+    assert extra == {"permit2FacilitatorAddress": scheme.get_signers("tron:nile")[0]}
+
+
+def test_verify_eip3009_path():
+    scheme = ExactTronFacilitatorScheme(DummySigner())
+    req = _requirements()
+    payload = _payload(req)
+    result = scheme.verify(payload, req)
+    assert result.is_valid is True
+
+
+def test_settle_eip3009_path():
+    scheme = ExactTronFacilitatorScheme(DummySigner())
+    req = _requirements()
+    payload = _payload(req)
+    result = scheme.settle(payload, req)
+    assert result.success is True
diff --git a/python/x402/tests/unit/mechanisms/tron/test_permit2.py b/python/x402/tests/unit/mechanisms/tron/test_permit2.py
new file mode 100644
index 00000000..c8b00178
--- /dev/null
+++ b/python/x402/tests/unit/mechanisms/tron/test_permit2.py
@@ -0,0 +1,333 @@
+"""Tests for TRON Permit2 facilitator logic."""
+
+import time
+
+from bankofai.x402.extensions.trc20_approval_gas_sponsoring import (
+    TRC20_APPROVAL_GAS_SPONSORING,
+    create_trc20_approval_gas_sponsoring_extension,
+)
+from bankofai.x402.interfaces import FacilitatorContext
+from bankofai.x402.mechanisms.tron.constants import ERR_PERMIT2_ALLOWANCE_REQUIRED
+from bankofai.x402.mechanisms.tron.exact.permit2 import settle_permit2, verify_permit2
+from bankofai.x402.mechanisms.tron.types import ExactPermit2Payload
+from bankofai.x402.schemas import PaymentPayload, PaymentRequirements
+
+
+class DummySigner:
+    def __init__(self, allowance: int, balance: int = 10**12, valid_signature: bool = True):
+        self._allowance = allowance
+        self._balance = balance
+        self._valid_signature = valid_signature
+        self._address = "0x" + "99" * 20
+
+    def get_addresses(self):
+        return [self._address]
+
+    def verify_typed_data(self, *args, **kwargs):
+        return self._valid_signature
+
+    def read_contract(self, address: str, function_name: str, args=None):
+        if function_name == "allowance":
+            return self._allowance
+        if function_name == "balanceOf":
+            return self._balance
+        return 0
+
+    def write_contract_with_abi(self, *args, **kwargs):
+        return "0x" + "00" * 32
+
+    def wait_for_transaction_receipt(self, tx_hash: str):
+        class Receipt:
+            status = "success"
+
+        return Receipt()
+
+    def get_sign_weight(self, transaction):
+        return {"result": {"result": True}}
+
+
+class Base58ArgsSigner(DummySigner):
+    def read_contract(self, address: str, function_name: str, args=None):
+        args = args or []
+        if function_name in {"allowance", "balanceOf"}:
+            for arg in args:
+                if isinstance(arg, str) and not (arg.startswith("T") and len(arg) == 34):
+                    raise ValueError("EncodingTypeError")
+        return super().read_contract(address, function_name, args)
+
+
+class FailingApprovalSigner:
+    def send_raw_transaction(self, signed_transaction):
+        raise AssertionError(
+            "send_raw_transaction should not be called when allowance is sufficient"
+        )
+
+    def wait_for_transaction_receipt(self, tx_hash: str):
+        raise AssertionError(
+            "wait_for_transaction_receipt should not be called when allowance is sufficient"
+        )
+
+
+class Base58WriteSigner(Base58ArgsSigner):
+    def write_contract_with_abi(self, address, function_name, args, abi, fee_limit=1_000_000_000):
+        permit_tuple = args[0]
+        payer = args[1]
+        witness = args[2]
+
+        token = permit_tuple[0][0]
+        assert isinstance(token, str) and token.startswith("T") and len(token) == 34
+        assert isinstance(payer, str) and payer.startswith("T") and len(payer) == 34
+        assert isinstance(witness[0], str) and witness[0].startswith("T") and len(witness[0]) == 34
+        assert isinstance(witness[1], str) and witness[1].startswith("T") and len(witness[1]) == 34
+        return "0x" + "00" * 32
+
+
+def _requirements() -> PaymentRequirements:
+    return PaymentRequirements(
+        scheme="exact",
+        network="tron:nile",
+        asset="0x" + "11" * 20,
+        amount="1000",
+        pay_to="0x" + "22" * 20,
+        max_timeout_seconds=3600,
+    )
+
+
+def _payload_dict(req: PaymentRequirements, signer_address: str) -> dict:
+    now = int(time.time())
+    return {
+        "signature": "0x" + "11" * 65,
+        "permit2Authorization": {
+            "from": "0x" + "33" * 20,
+            "permitted": {"token": req.asset, "amount": req.amount},
+            "spender": "0x" + "55" * 20,
+            "nonce": "1",
+            "deadline": str(now + 3600),
+            "witness": {
+                "to": req.pay_to,
+                "facilitator": signer_address,
+                "validAfter": str(now - 600),
+            },
+        },
+    }
+
+
+def test_verify_permit2_valid(monkeypatch):
+    import bankofai.x402.mechanisms.tron.exact.permit2 as tron_permit2
+
+    monkeypatch.setitem(tron_permit2.PERMIT2_ADDRESSES, "tron:nile", "0x" + "44" * 20)
+    monkeypatch.setitem(tron_permit2.X402_PERMIT2_PROXY_ADDRESSES, "tron:nile", "0x" + "55" * 20)
+
+    req = _requirements()
+    signer = DummySigner(allowance=10**9)
+    payload_dict = _payload_dict(req, signer.get_addresses()[0])
+    payload = PaymentPayload(x402_version=2, payload=payload_dict, accepted=req)
+
+    result = verify_permit2(
+        signer,
+        payload,
+        req,
+        ExactPermit2Payload.from_dict(payload_dict),
+    )
+    assert result.is_valid is True
+
+
+def test_verify_permit2_allowance_required(monkeypatch):
+    import bankofai.x402.mechanisms.tron.exact.permit2 as tron_permit2
+
+    monkeypatch.setitem(tron_permit2.PERMIT2_ADDRESSES, "tron:nile", "0x" + "44" * 20)
+    monkeypatch.setitem(tron_permit2.X402_PERMIT2_PROXY_ADDRESSES, "tron:nile", "0x" + "55" * 20)
+
+    req = _requirements()
+    signer = DummySigner(allowance=0)
+    payload_dict = _payload_dict(req, signer.get_addresses()[0])
+    payload = PaymentPayload(x402_version=2, payload=payload_dict, accepted=req)
+
+    result = verify_permit2(
+        signer,
+        payload,
+        req,
+        ExactPermit2Payload.from_dict(payload_dict),
+    )
+    assert result.is_valid is False
+    assert result.invalid_reason == ERR_PERMIT2_ALLOWANCE_REQUIRED
+
+
+def test_settle_permit2_success(monkeypatch):
+    import bankofai.x402.mechanisms.tron.exact.permit2 as tron_permit2
+
+    monkeypatch.setitem(tron_permit2.PERMIT2_ADDRESSES, "tron:nile", "0x" + "44" * 20)
+    monkeypatch.setitem(tron_permit2.X402_PERMIT2_PROXY_ADDRESSES, "tron:nile", "0x" + "55" * 20)
+
+    req = _requirements()
+    signer = DummySigner(allowance=10**9)
+    payload_dict = _payload_dict(req, signer.get_addresses()[0])
+    payload = PaymentPayload(x402_version=2, payload=payload_dict, accepted=req)
+
+    result = settle_permit2(
+        signer,
+        payload,
+        req,
+        ExactPermit2Payload.from_dict(payload_dict),
+    )
+    assert result.success is True
+
+
+def test_verify_permit2_allows_trc20_extension(monkeypatch):
+    import bankofai.x402.mechanisms.tron.exact.permit2 as tron_permit2
+
+    monkeypatch.setitem(tron_permit2.PERMIT2_ADDRESSES, "tron:nile", "0x" + "44" * 20)
+    monkeypatch.setitem(tron_permit2.X402_PERMIT2_PROXY_ADDRESSES, "tron:nile", "0x" + "55" * 20)
+
+    req = _requirements()
+    signer = DummySigner(allowance=0)
+    payload_dict = _payload_dict(req, signer.get_addresses()[0])
+
+    spender_word = ("0x" + "44" * 20).removeprefix("0x").rjust(64, "0")
+    amount_word = hex((1 << 256) - 1).removeprefix("0x").rjust(64, "0")
+    approval_data = "095ea7b3" + spender_word + amount_word
+
+    payload = PaymentPayload(
+        x402_version=2,
+        payload=payload_dict,
+        accepted=req,
+        extensions={
+            TRC20_APPROVAL_GAS_SPONSORING.key: {
+                "info": {
+                    "from": payload_dict["permit2Authorization"]["from"],
+                    "asset": req.asset,
+                    "spender": "0x" + "44" * 20,
+                    "amount": str((1 << 256) - 1),
+                    "signedTransaction": {
+                        "raw_data": {
+                            "contract": [
+                                {
+                                    "parameter": {
+                                        "value": {
+                                            "owner_address": payload_dict["permit2Authorization"][
+                                                "from"
+                                            ],
+                                            "contract_address": req.asset,
+                                            "data": approval_data,
+                                        }
+                                    }
+                                }
+                            ]
+                        },
+                        "signature": ["0x01"],
+                    },
+                    "version": "1",
+                }
+            }
+        },
+    )
+
+    context = FacilitatorContext(
+        {TRC20_APPROVAL_GAS_SPONSORING.key: create_trc20_approval_gas_sponsoring_extension(signer)}
+    )
+
+    result = verify_permit2(
+        signer,
+        payload,
+        req,
+        ExactPermit2Payload.from_dict(payload_dict),
+        context,
+    )
+    assert result.is_valid is True
+
+
+def test_verify_permit2_ignores_server_declared_extension_when_allowance_sufficient(monkeypatch):
+    import bankofai.x402.mechanisms.tron.exact.permit2 as tron_permit2
+
+    monkeypatch.setitem(tron_permit2.PERMIT2_ADDRESSES, "tron:nile", "0x" + "44" * 20)
+    monkeypatch.setitem(tron_permit2.X402_PERMIT2_PROXY_ADDRESSES, "tron:nile", "0x" + "55" * 20)
+
+    req = _requirements()
+    signer = Base58ArgsSigner(allowance=10**9)
+    payload_dict = _payload_dict(req, signer.get_addresses()[0])
+    payload = PaymentPayload(
+        x402_version=2,
+        payload=payload_dict,
+        accepted=req,
+        extensions={
+            TRC20_APPROVAL_GAS_SPONSORING.key: {
+                "info": {"description": "TRC-20 approval gas sponsoring (Permit2)", "version": "1"},
+                "schema": {},
+            }
+        },
+    )
+
+    result = verify_permit2(
+        signer,
+        payload,
+        req,
+        ExactPermit2Payload.from_dict(payload_dict),
+    )
+    assert result.is_valid is True
+
+
+def test_settle_permit2_skips_trc20_approval_when_allowance_sufficient(monkeypatch):
+    import bankofai.x402.mechanisms.tron.exact.permit2 as tron_permit2
+
+    monkeypatch.setitem(tron_permit2.PERMIT2_ADDRESSES, "tron:nile", "0x" + "44" * 20)
+    monkeypatch.setitem(tron_permit2.X402_PERMIT2_PROXY_ADDRESSES, "tron:nile", "0x" + "55" * 20)
+
+    req = _requirements()
+    signer = Base58ArgsSigner(allowance=10**9)
+    payload_dict = _payload_dict(req, signer.get_addresses()[0])
+
+    payload = PaymentPayload(
+        x402_version=2,
+        payload=payload_dict,
+        accepted=req,
+        extensions={
+            TRC20_APPROVAL_GAS_SPONSORING.key: {
+                "info": {
+                    "from": payload_dict["permit2Authorization"]["from"],
+                    "asset": req.asset,
+                    "spender": "0x" + "44" * 20,
+                    "amount": str((1 << 256) - 1),
+                    "signedTransaction": {"raw_data": {"contract": []}, "signature": ["0x01"]},
+                    "version": "1",
+                },
+                "schema": {},
+            }
+        },
+    )
+
+    context = FacilitatorContext(
+        {
+            TRC20_APPROVAL_GAS_SPONSORING.key: create_trc20_approval_gas_sponsoring_extension(
+                FailingApprovalSigner()
+            )
+        }
+    )
+
+    result = settle_permit2(
+        signer,
+        payload,
+        req,
+        ExactPermit2Payload.from_dict(payload_dict),
+        context,
+    )
+    assert result.success is True
+
+
+def test_settle_permit2_uses_base58_addresses_in_contract_call(monkeypatch):
+    import bankofai.x402.mechanisms.tron.exact.permit2 as tron_permit2
+
+    monkeypatch.setitem(tron_permit2.PERMIT2_ADDRESSES, "tron:nile", "0x" + "44" * 20)
+    monkeypatch.setitem(tron_permit2.X402_PERMIT2_PROXY_ADDRESSES, "tron:nile", "0x" + "55" * 20)
+
+    req = _requirements()
+    signer = Base58WriteSigner(allowance=10**9)
+    payload_dict = _payload_dict(req, signer.get_addresses()[0])
+    payload = PaymentPayload(x402_version=2, payload=payload_dict, accepted=req)
+
+    result = settle_permit2(
+        signer,
+        payload,
+        req,
+        ExactPermit2Payload.from_dict(payload_dict),
+    )
+    assert result.success is True
diff --git a/python/x402/tests/unit/mechanisms/tron/test_server.py b/python/x402/tests/unit/mechanisms/tron/test_server.py
new file mode 100644
index 00000000..52e9409b
--- /dev/null
+++ b/python/x402/tests/unit/mechanisms/tron/test_server.py
@@ -0,0 +1,52 @@
+"""Tests for TRON Exact server scheme."""
+
+import pytest
+
+from bankofai.x402.mechanisms.tron import get_network_config
+from bankofai.x402.mechanisms.tron.exact import ExactTronServerScheme
+from bankofai.x402.schemas import AssetAmount, PaymentRequirements, SupportedKind
+
+
+def test_parse_price_default_asset():
+    server = ExactTronServerScheme()
+    network = "tron:nile"
+    result = server.parse_price("$0.10", network)
+    assert result.amount == "100000"
+    assert result.asset == get_network_config(network)["default_asset"]["address"]
+    assert result.extra == {"name": "Tether USD", "version": "1"}
+
+
+def test_parse_price_asset_amount():
+    server = ExactTronServerScheme()
+    network = "tron:nile"
+    asset_amount = AssetAmount(amount="123", asset="0x" + "11" * 20, extra={"foo": "bar"})
+    result = server.parse_price(asset_amount, network)
+    assert result.amount == "123"
+    assert result.asset == asset_amount.asset
+    assert result.extra == {"foo": "bar"}
+
+
+def test_parse_price_missing_asset_raises():
+    server = ExactTronServerScheme()
+    with pytest.raises(ValueError, match="Asset address required"):
+        server.parse_price({"amount": "123"}, "tron:nile")
+
+
+def test_enhance_payment_requirements_adds_domain():
+    server = ExactTronServerScheme()
+    network = "tron:nile"
+    requirements = PaymentRequirements(
+        scheme="exact",
+        network=network,
+        asset="",
+        amount="1000",
+        pay_to="0x" + "22" * 20,
+        max_timeout_seconds=3600,
+        extra={},
+    )
+    supported_kind = SupportedKind(x402_version=2, scheme="exact", network=network, extra={})
+    result = server.enhance_payment_requirements(requirements, supported_kind, [])
+    assert result.asset == get_network_config(network)["default_asset"]["address"]
+    assert result.extra is not None
+    assert result.extra["name"] == "Tether USD"
+    assert result.extra["version"] == "1"
diff --git a/python/x402/tests/unit/mechanisms/tron/test_types.py b/python/x402/tests/unit/mechanisms/tron/test_types.py
new file mode 100644
index 00000000..3fe9cec2
--- /dev/null
+++ b/python/x402/tests/unit/mechanisms/tron/test_types.py
@@ -0,0 +1,61 @@
+"""Tests for TRON payload types."""
+
+from bankofai.x402.mechanisms.tron import (
+    ExactEIP3009Authorization,
+    ExactEIP3009Payload,
+    ExactPermit2Payload,
+    ExactTronPayloadV1,
+    Permit2Authorization,
+    Permit2Witness,
+    is_permit2_payload,
+)
+
+
+class TestExactEIP3009Payload:
+    def test_round_trip(self):
+        auth = ExactEIP3009Authorization(
+            from_address="0x" + "11" * 20,
+            to="0x" + "22" * 20,
+            value="1000",
+            valid_after="1",
+            valid_before="2",
+            nonce="0x" + "aa" * 32,
+        )
+        payload = ExactEIP3009Payload(authorization=auth, signature="0x" + "bb" * 65)
+        restored = ExactEIP3009Payload.from_dict(payload.to_dict())
+        assert restored.authorization.from_address == auth.from_address
+        assert restored.authorization.to == auth.to
+        assert restored.authorization.value == auth.value
+        assert restored.signature == payload.signature
+
+
+class TestExactPermit2Payload:
+    def test_round_trip(self):
+        auth = Permit2Authorization(
+            from_address="0x" + "11" * 20,
+            permitted_token="0x" + "22" * 20,
+            permitted_amount="1000",
+            spender="0x" + "33" * 20,
+            nonce="1",
+            deadline="2",
+            witness=Permit2Witness(
+                to="0x" + "44" * 20,
+                facilitator="0x" + "55" * 20,
+                valid_after="3",
+            ),
+        )
+        payload = ExactPermit2Payload(permit2_authorization=auth, signature="0x" + "cc" * 65)
+        restored = ExactPermit2Payload.from_dict(payload.to_dict())
+        assert restored.permit2_authorization.from_address == auth.from_address
+        assert restored.permit2_authorization.permitted_token == auth.permitted_token
+        assert restored.permit2_authorization.witness.facilitator == auth.witness.facilitator
+        assert restored.signature == payload.signature
+
+
+class TestHelpers:
+    def test_v1_alias(self):
+        assert ExactTronPayloadV1 is ExactEIP3009Payload
+
+    def test_is_permit2_payload(self):
+        assert is_permit2_payload({"permit2Authorization": {}}) is True
+        assert is_permit2_payload({"authorization": {}}) is False
diff --git a/python/x402/tests/unit/mechanisms/tron/test_utils.py b/python/x402/tests/unit/mechanisms/tron/test_utils.py
new file mode 100644
index 00000000..054c8cc3
--- /dev/null
+++ b/python/x402/tests/unit/mechanisms/tron/test_utils.py
@@ -0,0 +1,58 @@
+"""Tests for TRON utilities."""
+
+import pytest
+
+from bankofai.x402.mechanisms.tron.constants import TRON_CHAIN_IDS, TRON_NETWORK_CONFIGS
+from bankofai.x402.mechanisms.tron.utils import (
+    create_nonce,
+    get_asset_info,
+    get_network_config,
+    get_tron_chain_id,
+    normalize_address_for_signing,
+)
+
+
+def test_get_tron_chain_id():
+    assert get_tron_chain_id("tron:nile") == TRON_CHAIN_IDS["tron:nile"]
+
+
+def test_get_tron_chain_id_invalid():
+    with pytest.raises(ValueError):
+        get_tron_chain_id("eip155:1")
+
+
+def test_get_network_config():
+    cfg = get_network_config("tron:mainnet")
+    assert cfg["chain_id"] == TRON_NETWORK_CONFIGS["tron:mainnet"]["chain_id"]
+
+
+def test_get_network_config_unknown():
+    with pytest.raises(ValueError):
+        get_network_config("tron:unknown")
+
+
+def test_get_asset_info_default():
+    default = TRON_NETWORK_CONFIGS["tron:nile"]["default_asset"]
+    asset = get_asset_info("tron:nile", default["address"])
+    assert asset["address"] == default["address"]
+
+
+def test_normalize_address_for_signing_accepts_hex():
+    addr = "0x" + "AA" * 20
+    assert normalize_address_for_signing(addr) == addr.lower()
+
+
+def test_normalize_address_for_signing_accepts_41_prefix():
+    addr = "41" + "11" * 20
+    assert normalize_address_for_signing(addr) == "0x" + "11" * 20
+
+
+def test_normalize_address_for_signing_invalid():
+    with pytest.raises(ValueError):
+        normalize_address_for_signing("not-an-address")
+
+
+def test_create_nonce_format():
+    nonce = create_nonce()
+    assert nonce.startswith("0x")
+    assert len(nonce) == 66
diff --git a/python/x402/uv.lock b/python/x402/uv.lock
index e01011de..7de48411 100644
--- a/python/x402/uv.lock
+++ b/python/x402/uv.lock
@@ -1,5 +1,4 @@
 version = 1
-revision = 1
 requires-python = ">=3.10"
 resolution-markers = [
     "python_full_version == '3.14.*'",
@@ -347,11 +346,10 @@ requires-dist = [
     { name = "solana", marker = "extra == 'svm'", specifier = ">=0.36.0" },
     { name = "solders", marker = "extra == 'svm'", specifier = ">=0.27.0" },
     { name = "starlette", marker = "extra == 'fastapi'", specifier = ">=0.27.0" },
-    { name = "tronpy", marker = "extra == 'tron'", specifier = ">=0.4.0" },
+    { name = "tronpy", marker = "extra == 'tron'", specifier = ">=0.6.0,<0.7.0" },
     { name = "typing-extensions", specifier = ">=4.0.0" },
     { name = "web3", marker = "extra == 'evm'", specifier = ">=7.0.0" },
 ]
-provides-extras = ["httpx", "requests", "flask", "fastapi", "tron", "evm", "svm", "mcp", "extensions", "clients", "servers", "mechanisms", "all"]
 
 [package.metadata.requires-dev]
 dev = [
diff --git a/typescript/packages/mcp/package.json b/typescript/packages/mcp/package.json
index 8e0a12f1..b9b78426 100644
--- a/typescript/packages/mcp/package.json
+++ b/typescript/packages/mcp/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@bankofai/x402-mcp",
-  "version": "2.6.0-beta.9",
+  "version": "2.6.0-beta.10",
   "main": "./dist/cjs/index.js",
   "module": "./dist/esm/index.js",
   "types": "./dist/cjs/index.d.ts",
diff --git a/typescript/packages/mcp/src/command/mcp-server.ts b/typescript/packages/mcp/src/command/mcp-server.ts
index aa36dd95..8f07a205 100644
--- a/typescript/packages/mcp/src/command/mcp-server.ts
+++ b/typescript/packages/mcp/src/command/mcp-server.ts
@@ -58,18 +58,55 @@ async function main(): Promise<void> {
     version,
   });
 
+  const balanceArgsSchema = z
+    .object({
+      network: z.string().optional(),
+      asset: z.string().optional(),
+      token: z.string().optional(),
+      pair: z.string().optional(),
+    })
+    .strict();
+
+  const payArgsSchema = z
+    .object({
+      url: z.string().url(),
+      method: z.string().optional(),
+      data: z.string().optional(),
+      query: z.string().optional(),
+      headers: z.string().optional(),
+      network: z.string().optional(),
+      asset: z.string().optional(),
+      token: z.string().optional(),
+      pair: z.string().optional(),
+      max_amount: z.string().optional(),
+      correlation_id: z.string().optional(),
+    })
+    .strict();
+
+  const approveArgsSchema = z
+    .object({
+      url: z.string().url(),
+      method: z.string().optional(),
+      data: z.string().optional(),
+      query: z.string().optional(),
+      headers: z.string().optional(),
+      network: z.string().optional(),
+      asset: z.string().optional(),
+      token: z.string().optional(),
+      pair: z.string().optional(),
+      max_amount: z.string().optional(),
+    })
+    .strict();
+
   server.tool("x402_status", "Show configured x402 wallet status.", {}, async () => {
     return toTextResult(runCli(["status"]));
   });
 
-  server.tool(
+  server.registerTool(
     "x402_balance",
-    "Show configured x402 wallet balances.",
     {
-      network: z.string().optional(),
-      asset: z.string().optional(),
-      token: z.string().optional(),
-      pair: z.string().optional(),
+      description: "Show configured x402 wallet balances.",
+      inputSchema: balanceArgsSchema,
     },
     async args => {
       const commandArgs = ["balance"];
@@ -81,21 +118,11 @@ async function main(): Promise<void> {
     },
   );
 
-  server.tool(
+  server.registerTool(
     "x402_pay",
-    "Call an x402-protected URL and automatically complete payment.",
     {
-      url: z.string().url(),
-      method: z.string().optional(),
-      data: z.string().optional(),
-      query: z.string().optional(),
-      headers: z.string().optional(),
-      network: z.string().optional(),
-      asset: z.string().optional(),
-      token: z.string().optional(),
-      pair: z.string().optional(),
-      max_amount: z.string().optional(),
-      correlation_id: z.string().optional(),
+      description: "Call an x402-protected URL and automatically complete payment.",
+      inputSchema: payArgsSchema,
     },
     async args => {
       const commandArgs = ["pay", args.url];
@@ -114,20 +141,11 @@ async function main(): Promise<void> {
     },
   );
 
-  server.tool(
+  server.registerTool(
     "x402_approve",
-    "Approve Permit2 allowance for the selected x402 payment option.",
     {
-      url: z.string().url(),
-      method: z.string().optional(),
-      data: z.string().optional(),
-      query: z.string().optional(),
-      headers: z.string().optional(),
-      network: z.string().optional(),
-      asset: z.string().optional(),
-      token: z.string().optional(),
-      pair: z.string().optional(),
-      max_amount: z.string().optional(),
+      description: "Approve Permit2 allowance for the selected x402 payment option.",
+      inputSchema: approveArgsSchema,
     },
     async args => {
       const commandArgs = ["approve", args.url];
diff --git a/typescript/packages/mcp/src/command/runtime.ts b/typescript/packages/mcp/src/command/runtime.ts
index cecc0890..cb66663d 100644
--- a/typescript/packages/mcp/src/command/runtime.ts
+++ b/typescript/packages/mcp/src/command/runtime.ts
@@ -94,6 +94,25 @@ const DEFAULT_PAYMENT_ASSETS: Partial<
   },
 };
 
+const NETWORK_ALIASES: Record<string, string> = {
+  mainnet: "tron:mainnet",
+  nile: "tron:nile",
+  shasta: "tron:shasta",
+  "tron:mainnet": "tron:mainnet",
+  "tron:nile": "tron:nile",
+  "tron:shasta": "tron:shasta",
+  tron_mainnet: "tron:mainnet",
+  tron_nile: "tron:nile",
+  tron_shasta: "tron:shasta",
+  bsc: "eip155:56",
+  "bsc-mainnet": "eip155:56",
+  bsc_mainnet: "eip155:56",
+  "eip155:56": "eip155:56",
+  "bsc-testnet": "eip155:97",
+  bsc_testnet: "eip155:97",
+  "eip155:97": "eip155:97",
+};
+
 export type ParsedCliOptions = Record<string, string>;
 
 function readJsonFile(file: string): Record<string, unknown> | undefined {
@@ -293,22 +312,16 @@ function resolvePreferredNetwork(network?: string): string | undefined {
     return undefined;
   }
 
-  if (network.startsWith("tron:") || network.startsWith("eip155:")) {
-    return network;
-  }
+  return NETWORK_ALIASES[network.trim().toLowerCase()];
+}
 
-  switch (network) {
-    case "mainnet":
-    case "nile":
-    case "shasta":
-      return `tron:${network}`;
-    case "bsc":
-      return "eip155:56";
-    case "bsc-testnet":
-      return "eip155:97";
-    default:
-      return undefined;
+function requireSupportedNetwork(network: string, optionName = "--network"): string {
+  const resolved = resolvePreferredNetwork(network);
+  if (!resolved) {
+    throw new Error(`Unsupported network for ${optionName}: ${network}`);
   }
+
+  return resolved;
 }
 
 function normalizeSelectorValue(value?: string): string | undefined {
@@ -327,23 +340,23 @@ function parsePairSelector(pair?: string): { network?: string; asset?: string }
   if (pair.includes("/")) {
     const [network, asset] = pair.split("/", 2);
     return {
-      network: resolvePreferredNetwork(network) ?? network,
+      network: requireSupportedNetwork(network, "--pair"),
       asset,
     };
   }
 
   const parts = pair.split(":");
   if (parts.length >= 3) {
+    const network = parts.slice(0, -1).join(":");
     return {
-      network:
-        resolvePreferredNetwork(parts.slice(0, -1).join(":")) ?? parts.slice(0, -1).join(":"),
+      network: requireSupportedNetwork(network, "--pair"),
       asset: parts.at(-1),
     };
   }
 
   if (parts.length === 2) {
     return {
-      network: resolvePreferredNetwork(parts[0]) ?? parts[0],
+      network: requireSupportedNetwork(parts[0], "--pair"),
       asset: parts[1],
     };
   }
@@ -695,8 +708,59 @@ export async function runStatus(): Promise<void> {
   process.stdout.write(JSON.stringify(result, null, 2) + "\n");
 }
 
-function getPreferredAsset(options: CliBalanceOptions): string | undefined {
-  return parsePairSelector(options.pair).asset ?? options.asset ?? options.token;
+function isHexAddress(value: string): value is `0x${string}` {
+  return /^0x[a-fA-F0-9]{40}$/.test(value);
+}
+
+function isTronAddress(value: string): boolean {
+  return TronWeb.isAddress(value);
+}
+
+function resolvePreferredAssetInfo(args: {
+  network: SupportedNetwork;
+  asset?: string;
+  token?: string;
+  pairAsset?: string;
+}): { asset: string; symbol?: string } | undefined {
+  const explicitToken = args.token?.trim();
+  const explicitAsset = args.asset?.trim();
+  const explicitPairAsset = args.pairAsset?.trim();
+  const explicitSelector = explicitPairAsset ?? explicitAsset ?? explicitToken;
+  const defaultAsset = getDefaultPaymentAsset(args.network);
+
+  if (!explicitSelector) {
+    return defaultAsset;
+  }
+
+  if (args.network === "mainnet" || args.network === "nile" || args.network === "shasta") {
+    if (
+      defaultAsset?.symbol &&
+      normalizeSelectorValue(explicitSelector) === normalizeSelectorValue(defaultAsset.symbol)
+    ) {
+      return defaultAsset;
+    }
+
+    if (!isTronAddress(explicitSelector)) {
+      throw new Error(`Invalid token address format for tron:${args.network}: ${explicitSelector}`);
+    }
+
+    return { asset: explicitSelector };
+  }
+
+  if (
+    defaultAsset?.symbol &&
+    normalizeSelectorValue(explicitSelector) === normalizeSelectorValue(defaultAsset.symbol)
+  ) {
+    return defaultAsset;
+  }
+
+  if (!isHexAddress(explicitSelector)) {
+    throw new Error(
+      `Invalid token address format for ${EVM_NETWORKS[args.network].chainId}: ${explicitSelector}`,
+    );
+  }
+
+  return { asset: explicitSelector };
 }
 
 function getDefaultPaymentAsset(
@@ -980,10 +1044,40 @@ export async function runBalance(options: CliBalanceOptions = {}): Promise<void>
   const { tronKey, evmKey, tronGridApiKey } = await resolveKeys();
   const result: Record<string, unknown> = {};
   const pairSelector = parsePairSelector(options.pair);
-  const preferredNetwork = resolvePreferredNetwork(options.network) ?? pairSelector.network;
-  const preferredAsset = getPreferredAsset(options);
+  const preferredNetwork =
+    options.network !== undefined ? requireSupportedNetwork(options.network) : pairSelector.network;
+  const includeTron = !preferredNetwork || preferredNetwork.startsWith("tron:");
+  const includeEvm = !preferredNetwork || preferredNetwork.startsWith("eip155:");
+
+  if (preferredNetwork?.startsWith("tron:")) {
+    resolvePreferredAssetInfo({
+      network: preferredNetwork.slice("tron:".length) as keyof typeof TRON_RPC_URLS,
+      asset: options.asset,
+      token: options.token,
+      pairAsset: pairSelector.asset,
+    });
+  }
 
-  if (tronKey) {
+  if (preferredNetwork?.startsWith("eip155:")) {
+    const evmNetwork =
+      preferredNetwork === "eip155:56"
+        ? "bsc"
+        : preferredNetwork === "eip155:97"
+          ? "bsc-testnet"
+          : undefined;
+    if (!evmNetwork) {
+      throw new Error(`Unsupported network for --network: ${preferredNetwork}`);
+    }
+
+    resolvePreferredAssetInfo({
+      network: evmNetwork,
+      asset: options.asset,
+      token: options.token,
+      pairAsset: pairSelector.asset,
+    });
+  }
+
+  if (tronKey && includeTron) {
     const tronWeb = buildTronWeb(TRON_RPC_URLS.nile, tronKey, tronGridApiKey);
     const signer = createClientTronSigner(tronWeb, tronKey);
     const trxSun = await tronWeb.trx.getBalance(signer.address);
@@ -991,10 +1085,12 @@ export async function runBalance(options: CliBalanceOptions = {}): Promise<void>
       preferredNetwork && preferredNetwork.startsWith("tron:")
         ? (preferredNetwork.slice("tron:".length) as keyof typeof TRON_RPC_URLS)
         : "nile";
-    const tokenInfo =
-      preferredAsset && (!preferredNetwork || preferredNetwork.startsWith("tron:"))
-        ? { asset: preferredAsset }
-        : getDefaultPaymentAsset(tronNetwork);
+    const tokenInfo = resolvePreferredAssetInfo({
+      network: tronNetwork,
+      asset: options.asset,
+      token: options.token,
+      pairAsset: pairSelector.asset,
+    });
     result.tron = {
       address: signer.address,
       network: `tron:${tronNetwork}`,
@@ -1016,7 +1112,7 @@ export async function runBalance(options: CliBalanceOptions = {}): Promise<void>
     }
   }
 
-  if (evmKey) {
+  if (evmKey && includeEvm) {
     const account = privateKeyToAccount(normalizeHexPrivateKey(evmKey));
     const balances: Record<string, unknown> = {};
 
@@ -1037,9 +1133,12 @@ export async function runBalance(options: CliBalanceOptions = {}): Promise<void>
         nativeBalance: balance.toString(),
       };
 
-      const tokenInfo = preferredAsset
-        ? { asset: preferredAsset }
-        : getDefaultPaymentAsset(networkName as keyof typeof EVM_NETWORKS);
+      const tokenInfo = resolvePreferredAssetInfo({
+        network: networkName as keyof typeof EVM_NETWORKS,
+        asset: options.asset,
+        token: options.token,
+        pairAsset: pairSelector.asset,
+      });
 
       if (tokenInfo?.asset) {
         entry.token = {
diff --git a/typescript/packages/mechanisms/evm/src/constants.ts b/typescript/packages/mechanisms/evm/src/constants.ts
index 98a27b1a..360fd98d 100644
--- a/typescript/packages/mechanisms/evm/src/constants.ts
+++ b/typescript/packages/mechanisms/evm/src/constants.ts
@@ -29,6 +29,7 @@ export const permit2WitnessTypes = {
   ],
   Witness: [
     { name: "to", type: "address" },
+    { name: "facilitator", type: "address" },
     { name: "validAfter", type: "uint256" },
   ],
 } as const;
@@ -147,25 +148,83 @@ export const DEFAULT_MAX_FEE_PER_GAS = 1_000_000_000n;
 export const DEFAULT_MAX_PRIORITY_FEE_PER_GAS = 100_000_000n;
 
 /**
- * Canonical Permit2 contract address.
- * Same address on all EVM chains via CREATE2 deployment.
+ * Canonical Uniswap Permit2 contract address.
+ * Used as the default on EVM chains that do not override Permit2 deployment.
  *
  * @see https://github.com/Uniswap/permit2
  */
 export const PERMIT2_ADDRESS = "0x000000000022D473030F116dDEE9F6B43aC78BA3" as const;
 
 /**
- * x402ExactPermit2Proxy contract address.
- * Current deployed address on BSC mainnet and BSC testnet.
+ * Chain-specific Permit2 deployments.
+ * BSC uses PancakeSwap's Permit2 deployment instead of the canonical Uniswap address.
+ */
+export const PERMIT2_ADDRESSES: Record<string, `0x${string}`> = {
+  "eip155:56": "0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768",
+  "eip155:97": "0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768",
+};
+
+/**
+ * Default x402ExactPermit2Proxy contract address.
+ * Preserved for backwards compatibility in exports and tests.
  */
 export const x402ExactPermit2ProxyAddress = "0xEe38Ec718255fe78e9D16aCC0e1183C731679b23" as const;
 
 /**
- * x402UptoPermit2Proxy contract address.
- * Current deployed address on BSC mainnet and BSC testnet.
+ * Chain-specific x402ExactPermit2Proxy deployments.
+ */
+export const X402_EXACT_PERMIT2_PROXY_ADDRESSES: Record<string, `0x${string}`> = {
+  "eip155:56": x402ExactPermit2ProxyAddress,
+  "eip155:97": x402ExactPermit2ProxyAddress,
+};
+
+/**
+ * Default x402UptoPermit2Proxy contract address.
+ * Preserved for backwards compatibility in exports and tests.
  */
 export const x402UptoPermit2ProxyAddress = "0x2b30Ed9F37c7C21ae8779c5753B1cCf264DfD63C" as const;
 
+/**
+ * Chain-specific x402UptoPermit2Proxy deployments.
+ */
+export const X402_UPTO_PERMIT2_PROXY_ADDRESSES: Record<string, `0x${string}`> = {
+  "eip155:56": x402UptoPermit2ProxyAddress,
+  "eip155:97": x402UptoPermit2ProxyAddress,
+};
+
+/**
+ * Resolve the Permit2 contract address for an EVM network.
+ * Falls back to the canonical Uniswap deployment when a chain-specific override is not configured.
+ *
+ * @param network - CAIP-2 EVM network identifier.
+ * @returns The Permit2 contract address for the requested network.
+ */
+export function getPermit2Address(network: string): `0x${string}` {
+  return PERMIT2_ADDRESSES[network] ?? PERMIT2_ADDRESS;
+}
+
+/**
+ * Resolve the x402 exact Permit2 proxy address for an EVM network.
+ * Falls back to the default exported address when a chain-specific override is not configured.
+ *
+ * @param network - CAIP-2 EVM network identifier.
+ * @returns The x402 exact Permit2 proxy contract address for the requested network.
+ */
+export function getX402ExactPermit2ProxyAddress(network: string): `0x${string}` {
+  return X402_EXACT_PERMIT2_PROXY_ADDRESSES[network] ?? x402ExactPermit2ProxyAddress;
+}
+
+/**
+ * Resolve the x402 upto Permit2 proxy address for an EVM network.
+ * Falls back to the default exported address when a chain-specific override is not configured.
+ *
+ * @param network - CAIP-2 EVM network identifier.
+ * @returns The x402 upto Permit2 proxy contract address for the requested network.
+ */
+export function getX402UptoPermit2ProxyAddress(network: string): `0x${string}` {
+  return X402_UPTO_PERMIT2_PROXY_ADDRESSES[network] ?? x402UptoPermit2ProxyAddress;
+}
+
 /**
  * Shared ABI components for the Permit2 witness tuple.
  * Used in both x402ExactPermit2ProxyABI and x402UptoPermit2ProxyABI to keep them in sync.
@@ -173,6 +232,7 @@ export const x402UptoPermit2ProxyAddress = "0x2b30Ed9F37c7C21ae8779c5753B1cCf264
  */
 const permit2WitnessABIComponents = [
   { name: "to", type: "address", internalType: "address" },
+  { name: "facilitator", type: "address", internalType: "address" },
   { name: "validAfter", type: "uint256", internalType: "uint256" },
 ] as const;
 
diff --git a/typescript/packages/mechanisms/evm/src/exact/client/eip2612.ts b/typescript/packages/mechanisms/evm/src/exact/client/eip2612.ts
index 7c305cd7..3914a195 100644
--- a/typescript/packages/mechanisms/evm/src/exact/client/eip2612.ts
+++ b/typescript/packages/mechanisms/evm/src/exact/client/eip2612.ts
@@ -1,6 +1,6 @@
 import { getAddress } from "viem";
 import type { Eip2612GasSponsoringInfo } from "@bankofai/x402-extensions";
-import { eip2612PermitTypes, eip2612NoncesAbi, PERMIT2_ADDRESS } from "../../constants";
+import { eip2612PermitTypes, eip2612NoncesAbi, getPermit2Address } from "../../constants";
 import { ClientEvmSigner } from "../../signer";
 
 /**
@@ -16,6 +16,7 @@ import { ClientEvmSigner } from "../../signer";
  * @param tokenAddress - The ERC-20 token contract address
  * @param tokenName - The token name (from paymentRequirements.extra.name)
  * @param tokenVersion - The token version (from paymentRequirements.extra.version)
+ * @param network - The target EVM network used to resolve Permit2
  * @param chainId - The chain ID
  * @param deadline - The deadline for the permit (unix timestamp as string)
  * @param permittedAmount - The Permit2 permitted amount (must match exactly)
@@ -26,12 +27,13 @@ export async function signEip2612Permit(
   tokenAddress: `0x${string}`,
   tokenName: string,
   tokenVersion: string,
+  network: string,
   chainId: number,
   deadline: string,
   permittedAmount: string,
 ): Promise<Eip2612GasSponsoringInfo> {
   const owner = signer.address;
-  const spender = getAddress(PERMIT2_ADDRESS);
+  const spender = getAddress(getPermit2Address(network));
 
   // Query the current EIP-2612 nonce from the token contract
   const nonce = (await signer.readContract({
diff --git a/typescript/packages/mechanisms/evm/src/exact/client/erc20approval.ts b/typescript/packages/mechanisms/evm/src/exact/client/erc20approval.ts
index a8044930..be72784a 100644
--- a/typescript/packages/mechanisms/evm/src/exact/client/erc20approval.ts
+++ b/typescript/packages/mechanisms/evm/src/exact/client/erc20approval.ts
@@ -4,7 +4,7 @@ import {
   type Erc20ApprovalGasSponsoringInfo,
 } from "@bankofai/x402-extensions";
 import {
-  PERMIT2_ADDRESS,
+  getPermit2Address,
   erc20ApproveAbi,
   ERC20_APPROVE_GAS_LIMIT,
   DEFAULT_MAX_FEE_PER_GAS,
@@ -23,16 +23,18 @@ import { ClientEvmSigner } from "../../signer";
  *
  * @param signer - The client EVM signer (must support signTransaction, getTransactionCount)
  * @param tokenAddress - The ERC-20 token contract address
+ * @param network - The target EVM network used to resolve Permit2
  * @param chainId - The chain ID
  * @returns The ERC-20 approval gas sponsoring info object
  */
 export async function signErc20ApprovalTransaction(
   signer: ClientEvmSigner,
   tokenAddress: `0x${string}`,
+  network: string,
   chainId: number,
 ): Promise<Erc20ApprovalGasSponsoringInfo> {
   const from = signer.address;
-  const spender = getAddress(PERMIT2_ADDRESS);
+  const spender = getAddress(getPermit2Address(network));
 
   // Encode approve(PERMIT2_ADDRESS, MaxUint256) calldata
   const data = encodeFunctionData({
diff --git a/typescript/packages/mechanisms/evm/src/exact/client/permit2.ts b/typescript/packages/mechanisms/evm/src/exact/client/permit2.ts
index 1c71988a..fe08d5a9 100644
--- a/typescript/packages/mechanisms/evm/src/exact/client/permit2.ts
+++ b/typescript/packages/mechanisms/evm/src/exact/client/permit2.ts
@@ -2,8 +2,8 @@ import { PaymentRequirements, PaymentPayloadResult } from "@bankofai/x402-core/t
 import { encodeFunctionData, getAddress } from "viem";
 import {
   permit2WitnessTypes,
-  PERMIT2_ADDRESS,
-  x402ExactPermit2ProxyAddress,
+  getPermit2Address,
+  getX402ExactPermit2ProxyAddress,
   erc20ApproveAbi,
   erc20AllowanceAbi,
 } from "../../constants";
@@ -37,17 +37,24 @@ export async function createPermit2Payload(
   // Upper time bound is enforced by Permit2's deadline field
   const deadline = (now + paymentRequirements.maxTimeoutSeconds).toString();
 
+  const facilitator =
+    paymentRequirements.extra?.permit2FacilitatorAddress as `0x${string}` | undefined;
+  if (!facilitator) {
+    throw new Error("permit2FacilitatorAddress is required for Permit2 payments");
+  }
+
   const permit2Authorization: ExactPermit2Payload["permit2Authorization"] = {
     from: signer.address,
     permitted: {
       token: getAddress(paymentRequirements.asset),
       amount: paymentRequirements.amount,
     },
-    spender: x402ExactPermit2ProxyAddress,
+    spender: getX402ExactPermit2ProxyAddress(paymentRequirements.network),
     nonce,
     deadline,
     witness: {
       to: getAddress(paymentRequirements.payTo),
+      facilitator: getAddress(facilitator),
       validAfter,
     },
   };
@@ -84,11 +91,12 @@ async function signPermit2Authorization(
   requirements: PaymentRequirements,
 ): Promise<`0x${string}`> {
   const chainId = getEvmChainId(requirements.network);
+  const permit2Address = getPermit2Address(requirements.network);
 
   const domain = {
     name: "Permit2",
     chainId,
-    verifyingContract: PERMIT2_ADDRESS,
+    verifyingContract: permit2Address,
   };
 
   const message = {
@@ -101,6 +109,7 @@ async function signPermit2Authorization(
     deadline: BigInt(permit2Authorization.deadline),
     witness: {
       to: getAddress(permit2Authorization.witness.to),
+      facilitator: getAddress(permit2Authorization.witness.facilitator),
       validAfter: BigInt(permit2Authorization.witness.validAfter),
     },
   };
@@ -118,25 +127,30 @@ async function signPermit2Authorization(
  * The user sends this transaction (paying gas) before using Permit2 flow.
  *
  * @param tokenAddress - The ERC20 token contract address
+ * @param network - The target EVM network used to resolve the Permit2 deployment
  * @returns Transaction data to send for approval
  *
  * @example
  * ```typescript
- * const tx = createPermit2ApprovalTx("0x...");
+ * const tx = createPermit2ApprovalTx("0x...", "eip155:97");
  * await walletClient.sendTransaction({
  *   to: tx.to,
  *   data: tx.data,
  * });
  * ```
  */
-export function createPermit2ApprovalTx(tokenAddress: `0x${string}`): {
+export function createPermit2ApprovalTx(
+  tokenAddress: `0x${string}`,
+  network: string,
+): {
   to: `0x${string}`;
   data: `0x${string}`;
 } {
+  const permit2Address = getPermit2Address(network);
   const data = encodeFunctionData({
     abi: erc20ApproveAbi,
     functionName: "approve",
-    args: [PERMIT2_ADDRESS, MAX_UINT256],
+    args: [permit2Address, MAX_UINT256],
   });
 
   return {
@@ -152,6 +166,7 @@ export function createPermit2ApprovalTx(tokenAddress: `0x${string}`): {
 export interface Permit2AllowanceParams {
   tokenAddress: `0x${string}`;
   ownerAddress: `0x${string}`;
+  network: string;
 }
 
 /**
@@ -178,10 +193,11 @@ export function getPermit2AllowanceReadParams(params: Permit2AllowanceParams): {
   functionName: "allowance";
   args: [`0x${string}`, `0x${string}`];
 } {
+  const permit2Address = getPermit2Address(params.network);
   return {
     address: getAddress(params.tokenAddress),
     abi: erc20AllowanceAbi,
     functionName: "allowance",
-    args: [getAddress(params.ownerAddress), PERMIT2_ADDRESS],
+    args: [getAddress(params.ownerAddress), permit2Address],
   };
 }
diff --git a/typescript/packages/mechanisms/evm/src/exact/client/scheme.ts b/typescript/packages/mechanisms/evm/src/exact/client/scheme.ts
index e8d673ee..9c5c2c49 100644
--- a/typescript/packages/mechanisms/evm/src/exact/client/scheme.ts
+++ b/typescript/packages/mechanisms/evm/src/exact/client/scheme.ts
@@ -7,7 +7,7 @@ import {
 import { EIP2612_GAS_SPONSORING, ERC20_APPROVAL_GAS_SPONSORING } from "@bankofai/x402-extensions";
 import { ClientEvmSigner } from "../../signer";
 import { AssetTransferMethod } from "../../types";
-import { PERMIT2_ADDRESS, erc20AllowanceAbi } from "../../constants";
+import { erc20AllowanceAbi, getPermit2Address } from "../../constants";
 import { getAddress } from "viem";
 import { getEvmChainId } from "../../utils";
 import { createEIP3009Payload } from "./eip3009";
@@ -126,6 +126,7 @@ export class ExactEvmScheme implements SchemeNetworkClient {
 
     const chainId = getEvmChainId(requirements.network);
     const tokenAddress = getAddress(requirements.asset) as `0x${string}`;
+    const permit2Address = getPermit2Address(requirements.network);
 
     // Check if user already has sufficient Permit2 allowance
     try {
@@ -133,7 +134,7 @@ export class ExactEvmScheme implements SchemeNetworkClient {
         address: tokenAddress,
         abi: erc20AllowanceAbi,
         functionName: "allowance",
-        args: [this.signer.address, PERMIT2_ADDRESS],
+        args: [this.signer.address, permit2Address],
       })) as bigint;
 
       if (allowance >= BigInt(requirements.amount)) {
@@ -156,6 +157,7 @@ export class ExactEvmScheme implements SchemeNetworkClient {
       tokenAddress,
       tokenName,
       tokenVersion,
+      requirements.network,
       chainId,
       deadline,
       requirements.amount,
@@ -202,6 +204,7 @@ export class ExactEvmScheme implements SchemeNetworkClient {
 
     const chainId = getEvmChainId(requirements.network);
     const tokenAddress = getAddress(requirements.asset) as `0x${string}`;
+    const permit2Address = getPermit2Address(requirements.network);
 
     // Check if user already has sufficient Permit2 allowance
     try {
@@ -209,7 +212,7 @@ export class ExactEvmScheme implements SchemeNetworkClient {
         address: tokenAddress,
         abi: erc20AllowanceAbi,
         functionName: "allowance",
-        args: [this.signer.address, PERMIT2_ADDRESS],
+        args: [this.signer.address, permit2Address],
       })) as bigint;
 
       if (allowance >= BigInt(requirements.amount)) {
@@ -220,7 +223,12 @@ export class ExactEvmScheme implements SchemeNetworkClient {
     }
 
     // Sign the approve(Permit2, MaxUint256) transaction
-    const info = await signErc20ApprovalTransaction(this.signer, tokenAddress, chainId);
+    const info = await signErc20ApprovalTransaction(
+      this.signer,
+      tokenAddress,
+      requirements.network,
+      chainId,
+    );
 
     return {
       [ERC20_APPROVAL_GAS_SPONSORING.key]: { info },
diff --git a/typescript/packages/mechanisms/evm/src/exact/facilitator/erc20approval.ts b/typescript/packages/mechanisms/evm/src/exact/facilitator/erc20approval.ts
index f5af587e..a7f21c5a 100644
--- a/typescript/packages/mechanisms/evm/src/exact/facilitator/erc20approval.ts
+++ b/typescript/packages/mechanisms/evm/src/exact/facilitator/erc20approval.ts
@@ -10,7 +10,7 @@ import {
   validateErc20ApprovalGasSponsoringInfo,
   type Erc20ApprovalGasSponsoringInfo,
 } from "@bankofai/x402-extensions";
-import { PERMIT2_ADDRESS, erc20ApproveAbi } from "../../constants";
+import { erc20ApproveAbi, getPermit2Address } from "../../constants";
 import {
   ErrErc20ApprovalInvalidFormat,
   ErrErc20ApprovalFromMismatch,
@@ -43,13 +43,16 @@ const APPROVE_SELECTOR = "0x095ea7b3";
  * @param info - The ERC-20 approval gas sponsoring info
  * @param payer - The expected payer address
  * @param tokenAddress - The expected token address
+ * @param network - CAIP-2 EVM network identifier used to resolve Permit2.
  * @returns Validation result with invalidReason and invalidMessage on failure
  */
 export async function validateErc20ApprovalForPayment(
   info: Erc20ApprovalGasSponsoringInfo,
   payer: `0x${string}`,
   tokenAddress: `0x${string}`,
+  network: string,
 ): Promise<Pick<VerifyResponse, "isValid" | "invalidReason" | "invalidMessage">> {
+  const permit2Address = getPermit2Address(network);
   if (!validateErc20ApprovalGasSponsoringInfo(info)) {
     return {
       isValid: false,
@@ -74,11 +77,11 @@ export async function validateErc20ApprovalForPayment(
     };
   }
 
-  if (getAddress(info.spender) !== getAddress(PERMIT2_ADDRESS)) {
+  if (getAddress(info.spender) !== getAddress(permit2Address)) {
     return {
       isValid: false,
       invalidReason: ErrErc20ApprovalSpenderNotPermit2,
-      invalidMessage: `Expected spender=${PERMIT2_ADDRESS}, got ${info.spender}`,
+      invalidMessage: `Expected spender=${permit2Address}, got ${info.spender}`,
     };
   }
 
@@ -109,11 +112,11 @@ export async function validateErc20ApprovalForPayment(
         data: data as `0x${string}`,
       });
       const calldataSpender = getAddress(decoded.args[0] as `0x${string}`);
-      if (calldataSpender !== getAddress(PERMIT2_ADDRESS)) {
+      if (calldataSpender !== getAddress(permit2Address)) {
         return {
           isValid: false,
           invalidReason: ErrErc20ApprovalTxWrongSpender,
-          invalidMessage: `approve() spender is ${calldataSpender}, expected Permit2 ${PERMIT2_ADDRESS}`,
+          invalidMessage: `approve() spender is ${calldataSpender}, expected Permit2 ${permit2Address}`,
         };
       }
     } catch {
diff --git a/typescript/packages/mechanisms/evm/src/exact/facilitator/permit2.ts b/typescript/packages/mechanisms/evm/src/exact/facilitator/permit2.ts
index 87098b27..1b3a4887 100644
--- a/typescript/packages/mechanisms/evm/src/exact/facilitator/permit2.ts
+++ b/typescript/packages/mechanisms/evm/src/exact/facilitator/permit2.ts
@@ -16,10 +16,10 @@ import type { Eip2612GasSponsoringInfo } from "@bankofai/x402-extensions";
 import { getAddress } from "viem";
 import {
   eip3009ABI,
-  PERMIT2_ADDRESS,
+  getPermit2Address,
   permit2WitnessTypes,
   x402ExactPermit2ProxyABI,
-  x402ExactPermit2ProxyAddress,
+  getX402ExactPermit2ProxyAddress,
   erc20AllowanceAbi,
 } from "../../constants";
 import {
@@ -78,11 +78,19 @@ export async function verifyPermit2(
 
   const chainId = getEvmChainId(requirements.network);
   const tokenAddress = getAddress(requirements.asset);
+  const permit2Address = getPermit2Address(requirements.network);
+  const proxyAddress = getX402ExactPermit2ProxyAddress(requirements.network);
+  const facilitator = resolvePermit2Facilitator(requirements, permit2Payload);
+  if (!facilitator) {
+    return {
+      isValid: false,
+      invalidReason: "invalid_permit2_facilitator_mismatch",
+      payer,
+    };
+  }
+  const { facilitatorAddress, witnessFacilitator } = facilitator;
 
-  if (
-    getAddress(permit2Payload.permit2Authorization.spender) !==
-    getAddress(x402ExactPermit2ProxyAddress)
-  ) {
+  if (getAddress(permit2Payload.permit2Authorization.spender) !== getAddress(proxyAddress)) {
     return {
       isValid: false,
       invalidReason: "invalid_permit2_spender",
@@ -100,6 +108,14 @@ export async function verifyPermit2(
     };
   }
 
+  if (getAddress(witnessFacilitator) !== getAddress(facilitatorAddress)) {
+    return {
+      isValid: false,
+      invalidReason: "invalid_permit2_facilitator_mismatch",
+      payer,
+    };
+  }
+
   const now = Math.floor(Date.now() / 1000);
   if (BigInt(permit2Payload.permit2Authorization.deadline) < BigInt(now + 6)) {
     return {
@@ -142,7 +158,7 @@ export async function verifyPermit2(
     domain: {
       name: "Permit2",
       chainId,
-      verifyingContract: PERMIT2_ADDRESS,
+      verifyingContract: permit2Address,
     },
     message: {
       permitted: {
@@ -154,6 +170,7 @@ export async function verifyPermit2(
       deadline: BigInt(permit2Payload.permit2Authorization.deadline),
       witness: {
         to: getAddress(permit2Payload.permit2Authorization.witness.to),
+        facilitator: getAddress(witnessFacilitator),
         validAfter: BigInt(permit2Payload.permit2Authorization.witness.validAfter),
       },
     },
@@ -240,12 +257,13 @@ async function _verifyPermit2Allowance(
   tokenAddress: `0x${string}`,
   context?: FacilitatorContext,
 ): Promise<VerifyResponse | null> {
+  const permit2Address = getPermit2Address(requirements.network);
   try {
     const allowance = (await signer.readContract({
       address: tokenAddress,
       abi: erc20AllowanceAbi,
       functionName: "allowance",
-      args: [payer, PERMIT2_ADDRESS],
+      args: [payer, permit2Address],
     })) as bigint;
 
     if (allowance >= BigInt(requirements.amount)) {
@@ -255,7 +273,12 @@ async function _verifyPermit2Allowance(
     // Allowance insufficient — try EIP-2612 gas sponsoring first
     const eip2612Info = extractEip2612GasSponsoringInfo(payload);
     if (eip2612Info) {
-      const result = validateEip2612PermitForPayment(eip2612Info, payer, tokenAddress);
+      const result = validateEip2612PermitForPayment(
+        eip2612Info,
+        payer,
+        tokenAddress,
+        requirements.network,
+      );
       if (!result.isValid) {
         return { isValid: false, invalidReason: result.invalidReason!, payer };
       }
@@ -270,7 +293,12 @@ async function _verifyPermit2Allowance(
     if (erc20GasSponsorshipExtension) {
       const erc20Info = extractErc20ApprovalGasSponsoringInfo(payload);
       if (erc20Info) {
-        const result = await validateErc20ApprovalForPayment(erc20Info, payer, tokenAddress);
+        const result = await validateErc20ApprovalForPayment(
+          erc20Info,
+          payer,
+          tokenAddress,
+          requirements.network,
+        );
         if (!result.isValid) {
           return { isValid: false, invalidReason: result.invalidReason!, payer };
         }
@@ -283,7 +311,12 @@ async function _verifyPermit2Allowance(
     // If allowance check fails, validate extensions if present; otherwise proceed optimistically
     const eip2612Info = extractEip2612GasSponsoringInfo(payload);
     if (eip2612Info) {
-      const result = validateEip2612PermitForPayment(eip2612Info, payer, tokenAddress);
+      const result = validateEip2612PermitForPayment(
+        eip2612Info,
+        payer,
+        tokenAddress,
+        requirements.network,
+      );
       if (!result.isValid) {
         return { isValid: false, invalidReason: result.invalidReason!, payer };
       }
@@ -369,11 +402,23 @@ async function _settlePermit2WithEIP2612(
   eip2612Info: Eip2612GasSponsoringInfo,
 ): Promise<SettleResponse> {
   const payer = permit2Payload.permit2Authorization.from;
+  const proxyAddress = getX402ExactPermit2ProxyAddress(payload.accepted.network);
+  const facilitator = resolvePermit2Facilitator(payload.accepted, permit2Payload);
+  if (!facilitator) {
+    return {
+      success: false,
+      network: payload.accepted.network,
+      transaction: "",
+      errorReason: "invalid_permit2_facilitator_mismatch",
+      payer,
+    };
+  }
+  const { witnessFacilitator } = facilitator;
   try {
     const { v, r, s } = splitEip2612Signature(eip2612Info.signature);
 
     const tx = await signer.writeContract({
-      address: x402ExactPermit2ProxyAddress,
+      address: proxyAddress,
       abi: x402ExactPermit2ProxyABI,
       functionName: "settleWithPermit",
       args: [
@@ -395,6 +440,7 @@ async function _settlePermit2WithEIP2612(
         getAddress(payer),
         {
           to: getAddress(permit2Payload.permit2Authorization.witness.to),
+          facilitator: getAddress(witnessFacilitator),
           validAfter: BigInt(permit2Payload.permit2Authorization.witness.validAfter),
         },
         permit2Payload.signature,
@@ -425,6 +471,18 @@ async function _settlePermit2WithERC20Approval(
   erc20Info: { signedTransaction: string },
 ): Promise<SettleResponse> {
   const payer = permit2Payload.permit2Authorization.from;
+  const proxyAddress = getX402ExactPermit2ProxyAddress(payload.accepted.network);
+  const facilitator = resolvePermit2Facilitator(payload.accepted, permit2Payload);
+  if (!facilitator) {
+    return {
+      success: false,
+      network: payload.accepted.network,
+      transaction: "",
+      errorReason: "invalid_permit2_facilitator_mismatch",
+      payer,
+    };
+  }
+  const { witnessFacilitator } = facilitator;
 
   try {
     const approvalTxHash = await extensionSigner.sendRawTransaction({
@@ -446,7 +504,7 @@ async function _settlePermit2WithERC20Approval(
     }
 
     const tx = await extensionSigner.writeContract({
-      address: x402ExactPermit2ProxyAddress,
+      address: proxyAddress,
       abi: x402ExactPermit2ProxyABI,
       functionName: "settle",
       args: [
@@ -461,6 +519,7 @@ async function _settlePermit2WithERC20Approval(
         getAddress(payer),
         {
           to: getAddress(permit2Payload.permit2Authorization.witness.to),
+          facilitator: getAddress(witnessFacilitator),
           validAfter: BigInt(permit2Payload.permit2Authorization.witness.validAfter),
         },
         permit2Payload.signature,
@@ -487,9 +546,21 @@ async function _settlePermit2Direct(
   permit2Payload: ExactPermit2Payload,
 ): Promise<SettleResponse> {
   const payer = permit2Payload.permit2Authorization.from;
+  const proxyAddress = getX402ExactPermit2ProxyAddress(payload.accepted.network);
+  const facilitator = resolvePermit2Facilitator(payload.accepted, permit2Payload);
+  if (!facilitator) {
+    return {
+      success: false,
+      network: payload.accepted.network,
+      transaction: "",
+      errorReason: "invalid_permit2_facilitator_mismatch",
+      payer,
+    };
+  }
+  const { witnessFacilitator } = facilitator;
   try {
     const tx = await signer.writeContract({
-      address: x402ExactPermit2ProxyAddress,
+      address: proxyAddress,
       abi: x402ExactPermit2ProxyABI,
       functionName: "settle",
       args: [
@@ -504,6 +575,7 @@ async function _settlePermit2Direct(
         getAddress(payer),
         {
           to: getAddress(permit2Payload.permit2Authorization.witness.to),
+          facilitator: getAddress(witnessFacilitator),
           validAfter: BigInt(permit2Payload.permit2Authorization.witness.validAfter),
         },
         permit2Payload.signature,
@@ -600,13 +672,16 @@ function _mapSettleError(
  * @param info - The EIP-2612 gas sponsoring info
  * @param payer - The expected payer address
  * @param tokenAddress - The expected token address
+ * @param network - CAIP-2 EVM network identifier used to resolve Permit2.
  * @returns Validation result with optional invalidReason
  */
 function validateEip2612PermitForPayment(
   info: Eip2612GasSponsoringInfo,
   payer: `0x${string}`,
   tokenAddress: `0x${string}`,
+  network: string,
 ): { isValid: boolean; invalidReason?: string } {
+  const permit2Address = getPermit2Address(network);
   if (!validateEip2612GasSponsoringInfo(info)) {
     return { isValid: false, invalidReason: "invalid_eip2612_extension_format" };
   }
@@ -619,7 +694,7 @@ function validateEip2612PermitForPayment(
     return { isValid: false, invalidReason: "eip2612_asset_mismatch" };
   }
 
-  if (getAddress(info.spender as `0x${string}`) !== getAddress(PERMIT2_ADDRESS)) {
+  if (getAddress(info.spender as `0x${string}`) !== getAddress(permit2Address)) {
     return { isValid: false, invalidReason: "eip2612_spender_not_permit2" };
   }
 
@@ -631,6 +706,29 @@ function validateEip2612PermitForPayment(
   return { isValid: true };
 }
 
+/**
+ * Resolves the expected facilitator address for Permit2 witness validation and settlement.
+ *
+ * @param requirements - The payment requirements associated with the payment.
+ * @param permit2Payload - The Permit2 payload supplied by the client.
+ * @returns The expected facilitator address and the witness facilitator value to use.
+ */
+function resolvePermit2Facilitator(
+  requirements: PaymentRequirements,
+  permit2Payload: ExactPermit2Payload,
+): { facilitatorAddress: `0x${string}`; witnessFacilitator: `0x${string}` } | null {
+  const facilitatorAddress =
+    requirements.extra?.permit2FacilitatorAddress as `0x${string}` | undefined;
+  const witnessFacilitator =
+    permit2Payload.permit2Authorization.witness.facilitator as `0x${string}` | undefined;
+
+  if (!facilitatorAddress || !witnessFacilitator) {
+    return null;
+  }
+
+  return { facilitatorAddress, witnessFacilitator };
+}
+
 /**
  * Splits a 65-byte EIP-2612 signature into v, r, s components.
  *
diff --git a/typescript/packages/mechanisms/evm/src/exact/facilitator/scheme.ts b/typescript/packages/mechanisms/evm/src/exact/facilitator/scheme.ts
index 52a1650d..0c7d52ac 100644
--- a/typescript/packages/mechanisms/evm/src/exact/facilitator/scheme.ts
+++ b/typescript/packages/mechanisms/evm/src/exact/facilitator/scheme.ts
@@ -48,13 +48,18 @@ export class ExactEvmScheme implements SchemeNetworkFacilitator {
   }
 
   /**
-   * Returns undefined — EVM has no mechanism-specific extra data.
+   * Returns mechanism-specific extra data for supported kinds.
    *
    * @param _ - The network identifier (unused)
-   * @returns undefined
+   * @returns Extra metadata for clients, including the Permit2 facilitator address
    */
   getExtra(_: string): Record<string, unknown> | undefined {
-    return undefined;
+    const facilitatorAddress = this.signer.getAddresses()[0];
+    return facilitatorAddress
+      ? {
+          permit2FacilitatorAddress: facilitatorAddress,
+        }
+      : undefined;
   }
 
   /**
diff --git a/typescript/packages/mechanisms/evm/src/exact/server/scheme.ts b/typescript/packages/mechanisms/evm/src/exact/server/scheme.ts
index 35cd85e8..e0bfebc9 100644
--- a/typescript/packages/mechanisms/evm/src/exact/server/scheme.ts
+++ b/typescript/packages/mechanisms/evm/src/exact/server/scheme.ts
@@ -99,10 +99,21 @@ export class ExactEvmScheme implements SchemeNetworkServer {
     },
     extensionKeys: string[],
   ): Promise<PaymentRequirements> {
-    // Mark unused parameters to satisfy linter
-    void supportedKind;
     void extensionKeys;
-    return Promise.resolve(paymentRequirements);
+    const existingMethod = paymentRequirements.extra?.assetTransferMethod as string | undefined;
+    const permit2FacilitatorAddress =
+      (paymentRequirements.extra?.permit2FacilitatorAddress as string | undefined) ??
+      (supportedKind.extra?.permit2FacilitatorAddress as string | undefined);
+
+    return Promise.resolve({
+      ...paymentRequirements,
+      extra: {
+        ...paymentRequirements.extra,
+        ...(existingMethod === "permit2" && permit2FacilitatorAddress
+          ? { permit2FacilitatorAddress }
+          : {}),
+      },
+    });
   }
 
   /**
diff --git a/typescript/packages/mechanisms/evm/src/index.ts b/typescript/packages/mechanisms/evm/src/index.ts
index 946047f3..19fcd90f 100644
--- a/typescript/packages/mechanisms/evm/src/index.ts
+++ b/typescript/packages/mechanisms/evm/src/index.ts
@@ -32,8 +32,14 @@ export { isPermit2Payload, isEIP3009Payload } from "./types";
 // Constants
 export {
   PERMIT2_ADDRESS,
+  PERMIT2_ADDRESSES,
+  getPermit2Address,
   x402ExactPermit2ProxyAddress,
+  X402_EXACT_PERMIT2_PROXY_ADDRESSES,
+  getX402ExactPermit2ProxyAddress,
   x402UptoPermit2ProxyAddress,
+  X402_UPTO_PERMIT2_PROXY_ADDRESSES,
+  getX402UptoPermit2ProxyAddress,
   permit2WitnessTypes,
   authorizationTypes,
   eip3009ABI,
diff --git a/typescript/packages/mechanisms/evm/src/types.ts b/typescript/packages/mechanisms/evm/src/types.ts
index ca243ca9..da3f1742 100644
--- a/typescript/packages/mechanisms/evm/src/types.ts
+++ b/typescript/packages/mechanisms/evm/src/types.ts
@@ -27,6 +27,7 @@ export type ExactEIP3009Payload = {
  */
 export type Permit2Witness = {
   to: `0x${string}`;
+  facilitator: `0x${string}`;
   validAfter: string;
 };
 
diff --git a/typescript/packages/mechanisms/evm/test/unit/constants.test.ts b/typescript/packages/mechanisms/evm/test/unit/constants.test.ts
index 2bd03051..d64688b1 100644
--- a/typescript/packages/mechanisms/evm/test/unit/constants.test.ts
+++ b/typescript/packages/mechanisms/evm/test/unit/constants.test.ts
@@ -4,6 +4,7 @@ import {
   authorizationTypes,
   eip3009ABI,
   permit2WitnessTypes,
+  getPermit2Address,
   x402ExactPermit2ProxyAddress,
   PERMIT2_ADDRESS,
 } from "../../src/constants";
@@ -91,11 +92,22 @@ describe("EVM Constants", () => {
       expect(hasExtra).toBe(false);
     });
 
-    it("Witness type must have exactly 'to' and 'validAfter' fields", () => {
+    it("Witness type must have exactly 'to', 'facilitator', and 'validAfter' fields", () => {
       const witnessFields = permit2WitnessTypes.Witness;
-      expect(witnessFields).toHaveLength(2);
+      expect(witnessFields).toHaveLength(3);
       expect(witnessFields[0].name).toBe("to");
-      expect(witnessFields[1].name).toBe("validAfter");
+      expect(witnessFields[1].name).toBe("facilitator");
+      expect(witnessFields[2].name).toBe("validAfter");
+    });
+  });
+
+  describe("Permit2 address resolution", () => {
+    it("should use PancakeSwap Permit2 on BSC testnet", () => {
+      expect(getPermit2Address("eip155:97")).toBe("0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768");
+    });
+
+    it("should fall back to canonical Permit2 on other EVM chains", () => {
+      expect(getPermit2Address("eip155:84532")).toBe(PERMIT2_ADDRESS);
     });
   });
 
@@ -124,6 +136,7 @@ describe("EVM Constants", () => {
       deadline: 9999999999n,
       witness: {
         to: "0x9876543210987654321098765432109876543210" as `0x${string}`,
+        facilitator: "0x1111111111111111111111111111111111111111" as `0x${string}`,
         validAfter: 0n,
       },
     } as const;
@@ -170,6 +183,7 @@ describe("EVM Constants", () => {
           ...canonicalMessage,
           witness: {
             to: "0x0000000000000000000000000000000000000001" as `0x${string}`,
+            facilitator: "0x1111111111111111111111111111111111111111" as `0x${string}`,
             validAfter: 0n,
           },
         },
diff --git a/typescript/packages/mechanisms/evm/test/unit/exact/client.test.ts b/typescript/packages/mechanisms/evm/test/unit/exact/client.test.ts
index d4d86a1d..5f04e963 100644
--- a/typescript/packages/mechanisms/evm/test/unit/exact/client.test.ts
+++ b/typescript/packages/mechanisms/evm/test/unit/exact/client.test.ts
@@ -9,6 +9,8 @@ import { PaymentRequirements } from "@bankofai/x402-core/types";
 import { PERMIT2_ADDRESS, x402ExactPermit2ProxyAddress } from "../../../src/constants";
 import { isPermit2Payload, isEIP3009Payload } from "../../../src/types";
 
+const permit2FacilitatorAddress = "0x1111111111111111111111111111111111111111";
+
 describe("ExactEvmScheme (Client)", () => {
   let client: ExactEvmScheme;
   let mockSigner: ClientEvmSigner;
@@ -266,7 +268,12 @@ describe("ExactEvmScheme (Client)", () => {
           asset: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
           payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
           maxTimeoutSeconds: 300,
-          extra: { name: "USD Coin", version: "2", assetTransferMethod: "permit2" },
+          extra: {
+            name: "USD Coin",
+            version: "2",
+            assetTransferMethod: "permit2",
+            permit2FacilitatorAddress,
+          },
         };
 
         const result = await client.createPaymentPayload(2, requirements);
@@ -287,7 +294,7 @@ describe("ExactEvmScheme (Client)", () => {
         asset: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 300,
-        extra: { assetTransferMethod: "permit2" },
+        extra: { assetTransferMethod: "permit2", permit2FacilitatorAddress },
       };
 
       const result = await client.createPaymentPayload(2, requirements);
@@ -308,7 +315,7 @@ describe("ExactEvmScheme (Client)", () => {
         asset: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 300,
-        extra: { assetTransferMethod: "permit2" },
+        extra: { assetTransferMethod: "permit2", permit2FacilitatorAddress },
       };
 
       const result = await client.createPaymentPayload(2, requirements);
@@ -326,7 +333,7 @@ describe("ExactEvmScheme (Client)", () => {
         asset: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
         payTo: payToAddress,
         maxTimeoutSeconds: 300,
-        extra: { assetTransferMethod: "permit2" },
+        extra: { assetTransferMethod: "permit2", permit2FacilitatorAddress },
       };
 
       const result = await client.createPaymentPayload(2, requirements);
@@ -345,7 +352,7 @@ describe("ExactEvmScheme (Client)", () => {
         asset: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 300,
-        extra: { assetTransferMethod: "permit2" },
+        extra: { assetTransferMethod: "permit2", permit2FacilitatorAddress },
       };
 
       await client.createPaymentPayload(2, requirements);
@@ -362,7 +369,7 @@ describe("Permit2 Approval Helpers", () => {
   describe("createPermit2ApprovalTx", () => {
     it("should create approval transaction data", () => {
       const tokenAddress = "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913" as `0x${string}`;
-      const tx = createPermit2ApprovalTx(tokenAddress);
+      const tx = createPermit2ApprovalTx(tokenAddress, "eip155:84532");
 
       expect(tx.to.toLowerCase()).toBe(tokenAddress.toLowerCase());
       expect(tx.data).toBeDefined();
@@ -371,11 +378,20 @@ describe("Permit2 Approval Helpers", () => {
 
     it("should encode approve function call", () => {
       const tokenAddress = "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913" as `0x${string}`;
-      const tx = createPermit2ApprovalTx(tokenAddress);
+      const tx = createPermit2ApprovalTx(tokenAddress, "eip155:84532");
 
       // approve(address,uint256) selector is 0x095ea7b3
       expect(tx.data.startsWith("0x095ea7b3")).toBe(true);
     });
+
+    it("should target PancakeSwap Permit2 on BSC testnet", () => {
+      const tokenAddress = "0x55d398326f99059fF775485246999027B3197955" as `0x${string}`;
+      const tx = createPermit2ApprovalTx(tokenAddress, "eip155:97");
+
+      expect(tx.data.toLowerCase()).toContain(
+        "31c2f6fcff4f8759b3bd5bf0e1084a055615c768".toLowerCase(),
+      );
+    });
   });
 
   describe("getPermit2AllowanceReadParams", () => {
@@ -383,6 +399,7 @@ describe("Permit2 Approval Helpers", () => {
       const params = getPermit2AllowanceReadParams({
         tokenAddress: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
         ownerAddress: "0x1234567890123456789012345678901234567890",
+        network: "eip155:84532",
       });
 
       expect(params.address.toLowerCase()).toBe(
@@ -399,6 +416,7 @@ describe("Permit2 Approval Helpers", () => {
       const params = getPermit2AllowanceReadParams({
         tokenAddress: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
         ownerAddress: "0x1234567890123456789012345678901234567890",
+        network: "eip155:84532",
       });
 
       expect(params.abi).toBeDefined();
@@ -486,6 +504,7 @@ describe("Permit2 Approval Flow", () => {
       const readParams = getPermit2AllowanceReadParams({
         tokenAddress,
         ownerAddress,
+        network: "eip155:84532",
       });
       expect(readParams).toBeDefined();
 
@@ -496,7 +515,7 @@ describe("Permit2 Approval Flow", () => {
       // Step 3: Check if approval needed
       if (checkNeedsApproval(currentAllowance, requiredAmount)) {
         // Step 4: Create approval transaction
-        const tx = createPermit2ApprovalTx(tokenAddress);
+        const tx = createPermit2ApprovalTx(tokenAddress, "eip155:84532");
         expect(tx.to).toBeDefined();
         expect(tx.data).toBeDefined();
 
@@ -570,13 +589,14 @@ describe("Permit2 Approval Flow", () => {
         asset: tokenAddress,
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 300,
-        extra: { assetTransferMethod: "permit2" },
+        extra: { assetTransferMethod: "permit2", permit2FacilitatorAddress },
       };
 
       // Step 1: Check allowance (simulated as zero)
       const readParams = getPermit2AllowanceReadParams({
         tokenAddress,
         ownerAddress: mockSigner.address,
+        network: requirements.network,
       });
       expect(readParams.functionName).toBe("allowance");
 
@@ -585,7 +605,7 @@ describe("Permit2 Approval Flow", () => {
       expect(needsApproval).toBe(true);
 
       // Step 2: Create and "send" approval tx
-      const approvalTx = createPermit2ApprovalTx(tokenAddress);
+      const approvalTx = createPermit2ApprovalTx(tokenAddress, requirements.network);
       expect(approvalTx.to.toLowerCase()).toBe(tokenAddress.toLowerCase());
       // In real app: await walletClient.sendTransaction(approvalTx)
 
@@ -606,7 +626,7 @@ describe("Permit2 Approval Flow", () => {
         asset: tokenAddress,
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 300,
-        extra: { assetTransferMethod: "permit2" },
+        extra: { assetTransferMethod: "permit2", permit2FacilitatorAddress },
       };
 
       // Step 1: Check allowance (simulated as max uint256 - already approved)
@@ -636,6 +656,7 @@ describe("Permit2 Approval Flow", () => {
         assetTransferMethod: "permit2",
         name: "USDC",
         version: "2",
+        permit2FacilitatorAddress,
       },
     };
 
@@ -734,6 +755,7 @@ describe("Permit2 Approval Flow", () => {
       maxTimeoutSeconds: 60,
       extra: {
         assetTransferMethod: "permit2",
+        permit2FacilitatorAddress,
         // No name/version - generic ERC-20 without EIP-2612
       },
     };
@@ -831,6 +853,7 @@ describe("Permit2 Approval Flow", () => {
           assetTransferMethod: "permit2",
           name: "TOKEN",
           version: "1",
+          permit2FacilitatorAddress,
         },
       };
 
diff --git a/typescript/packages/mechanisms/evm/test/unit/exact/facilitator.test.ts b/typescript/packages/mechanisms/evm/test/unit/exact/facilitator.test.ts
index 3c201ca4..dda13831 100644
--- a/typescript/packages/mechanisms/evm/test/unit/exact/facilitator.test.ts
+++ b/typescript/packages/mechanisms/evm/test/unit/exact/facilitator.test.ts
@@ -6,6 +6,8 @@ import { PaymentRequirements, PaymentPayload } from "@bankofai/x402-core/types";
 import { x402ExactPermit2ProxyAddress, PERMIT2_ADDRESS } from "../../../src/constants";
 import { ERC20_APPROVAL_GAS_SPONSORING } from "@bankofai/x402-extensions";
 
+const permit2FacilitatorAddress = "0x1111111111111111111111111111111111111111";
+
 // Mock viem's transaction parsing utilities for ERC-20 approval tests
 // Uses importOriginal to preserve all other viem exports (getAddress, etc.)
 vi.mock("viem", async importOriginal => {
@@ -267,7 +269,12 @@ describe("ExactEvmScheme (Facilitator)", () => {
         asset: "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 300,
-        extra: { name: "USDC", version: "2", assetTransferMethod: "permit2" },
+        extra: {
+          name: "USDC",
+          version: "2",
+          assetTransferMethod: "permit2",
+          permit2FacilitatorAddress,
+        },
       };
 
       // Mock readContract to return sufficient allowance and balance
@@ -288,6 +295,7 @@ describe("ExactEvmScheme (Facilitator)", () => {
             deadline: "999999999999",
             witness: {
               to: requirements.payTo,
+              facilitator: permit2FacilitatorAddress,
               validAfter: "0",
             },
           },
@@ -310,7 +318,12 @@ describe("ExactEvmScheme (Facilitator)", () => {
         asset: "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 300,
-        extra: { name: "USDC", version: "2", assetTransferMethod: "permit2" },
+        extra: {
+          name: "USDC",
+          version: "2",
+          assetTransferMethod: "permit2",
+          permit2FacilitatorAddress,
+        },
       };
 
       // Mock readContract to return zero allowance
@@ -331,6 +344,7 @@ describe("ExactEvmScheme (Facilitator)", () => {
             deadline: "999999999999",
             witness: {
               to: requirements.payTo,
+              facilitator: permit2FacilitatorAddress,
               validAfter: "0",
             },
           },
@@ -354,7 +368,12 @@ describe("ExactEvmScheme (Facilitator)", () => {
         asset: "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 300,
-        extra: { name: "USDC", version: "2", assetTransferMethod: "permit2" },
+        extra: {
+          name: "USDC",
+          version: "2",
+          assetTransferMethod: "permit2",
+          permit2FacilitatorAddress,
+        },
       };
 
       const permit2Payload: PaymentPayload = {
@@ -372,6 +391,7 @@ describe("ExactEvmScheme (Facilitator)", () => {
             deadline: "1", // Expired deadline
             witness: {
               to: requirements.payTo,
+              facilitator: permit2FacilitatorAddress,
               validAfter: "0",
             },
           },
@@ -395,7 +415,12 @@ describe("ExactEvmScheme (Facilitator)", () => {
         asset: "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 300,
-        extra: { name: "USDC", version: "2", assetTransferMethod: "permit2" },
+        extra: {
+          name: "USDC",
+          version: "2",
+          assetTransferMethod: "permit2",
+          permit2FacilitatorAddress,
+        },
       };
 
       const permit2Payload: PaymentPayload = {
@@ -413,6 +438,7 @@ describe("ExactEvmScheme (Facilitator)", () => {
             deadline: "999999999999",
             witness: {
               to: requirements.payTo,
+              facilitator: permit2FacilitatorAddress,
               validAfter: "0",
             },
           },
@@ -436,7 +462,12 @@ describe("ExactEvmScheme (Facilitator)", () => {
         asset: "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 300,
-        extra: { name: "USDC", version: "2", assetTransferMethod: "permit2" },
+        extra: {
+          name: "USDC",
+          version: "2",
+          assetTransferMethod: "permit2",
+          permit2FacilitatorAddress,
+        },
       };
 
       const permit2Payload: PaymentPayload = {
@@ -454,6 +485,7 @@ describe("ExactEvmScheme (Facilitator)", () => {
             deadline: "999999999999",
             witness: {
               to: "0x0000000000000000000000000000000000000001", // Wrong recipient
+              facilitator: permit2FacilitatorAddress,
               validAfter: "0",
             },
           },
@@ -479,7 +511,12 @@ describe("ExactEvmScheme (Facilitator)", () => {
         asset: "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 300,
-        extra: { name: "USDC", version: "2", assetTransferMethod: "permit2" },
+        extra: {
+          name: "USDC",
+          version: "2",
+          assetTransferMethod: "permit2",
+          permit2FacilitatorAddress,
+        },
       };
 
       // Mock readContract to return sufficient allowance and balance
@@ -500,6 +537,7 @@ describe("ExactEvmScheme (Facilitator)", () => {
             deadline: "999999999999",
             witness: {
               to: requirements.payTo,
+              facilitator: permit2FacilitatorAddress,
               validAfter: "0",
             },
           },
@@ -524,7 +562,12 @@ describe("ExactEvmScheme (Facilitator)", () => {
         asset: "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 300,
-        extra: { name: "USDC", version: "2", assetTransferMethod: "permit2" },
+        extra: {
+          name: "USDC",
+          version: "2",
+          assetTransferMethod: "permit2",
+          permit2FacilitatorAddress,
+        },
       };
 
       // Mock readContract to return zero allowance
@@ -545,6 +588,7 @@ describe("ExactEvmScheme (Facilitator)", () => {
             deadline: "999999999999",
             witness: {
               to: requirements.payTo,
+              facilitator: permit2FacilitatorAddress,
               validAfter: "0",
             },
           },
@@ -641,7 +685,12 @@ describe("ExactEvmScheme (Facilitator)", () => {
         asset: "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 60,
-        extra: { assetTransferMethod: "permit2", name: "USDC", version: "2" },
+        extra: {
+          assetTransferMethod: "permit2",
+          name: "USDC",
+          version: "2",
+          permit2FacilitatorAddress,
+        },
       };
 
       // Create a Permit2 payload
@@ -697,7 +746,12 @@ describe("ExactEvmScheme (Facilitator)", () => {
         asset: "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 60,
-        extra: { assetTransferMethod: "permit2", name: "USDC", version: "2" },
+        extra: {
+          assetTransferMethod: "permit2",
+          name: "USDC",
+          version: "2",
+          permit2FacilitatorAddress,
+        },
       };
 
       const permit2ClientSigner: ClientEvmSigner = {
@@ -734,7 +788,12 @@ describe("ExactEvmScheme (Facilitator)", () => {
         asset: "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
         payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
         maxTimeoutSeconds: 60,
-        extra: { assetTransferMethod: "permit2", name: "USDC", version: "2" },
+        extra: {
+          assetTransferMethod: "permit2",
+          name: "USDC",
+          version: "2",
+          permit2FacilitatorAddress,
+        },
       };
 
       const permit2ClientSigner: ClientEvmSigner = {
@@ -782,7 +841,12 @@ describe("ExactEvmScheme (Facilitator)", () => {
       asset: "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
       payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
       maxTimeoutSeconds: 60,
-      extra: { assetTransferMethod: "permit2", name: "USDC", version: "2" },
+      extra: {
+        assetTransferMethod: "permit2",
+        name: "USDC",
+        version: "2",
+        permit2FacilitatorAddress,
+      },
     };
 
     function makePermit2Payload(extensions?: Record<string, unknown>): PaymentPayload {
@@ -802,6 +866,7 @@ describe("ExactEvmScheme (Facilitator)", () => {
             deadline: (now + 300).toString(),
             witness: {
               to: permit2Requirements.payTo,
+              facilitator: permit2FacilitatorAddress,
               validAfter: "0",
             },
           },
@@ -955,7 +1020,7 @@ describe("ExactEvmScheme (Facilitator)", () => {
       asset: TOKEN_ADDRESS,
       payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
       maxTimeoutSeconds: 60,
-      extra: { assetTransferMethod: "permit2" },
+      extra: { assetTransferMethod: "permit2", permit2FacilitatorAddress },
     };
 
     function makeErc20Permit2Payload(extensions?: Record<string, unknown>): PaymentPayload {
@@ -975,6 +1040,7 @@ describe("ExactEvmScheme (Facilitator)", () => {
             deadline: (now + 300).toString(),
             witness: {
               to: erc20Requirements.payTo,
+              facilitator: permit2FacilitatorAddress,
               validAfter: "0",
             },
           },
@@ -1177,7 +1243,7 @@ describe("ExactEvmScheme (Facilitator)", () => {
       asset: TOKEN_ADDRESS,
       payTo: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
       maxTimeoutSeconds: 60,
-      extra: { assetTransferMethod: "permit2" },
+      extra: { assetTransferMethod: "permit2", permit2FacilitatorAddress },
     };
 
     function makeErc20Permit2Payload(extensions?: Record<string, unknown>): PaymentPayload {
@@ -1197,6 +1263,7 @@ describe("ExactEvmScheme (Facilitator)", () => {
             deadline: (now + 300).toString(),
             witness: {
               to: erc20Requirements.payTo,
+              facilitator: permit2FacilitatorAddress,
               validAfter: "0",
             },
           },
diff --git a/typescript/packages/mechanisms/tron/src/exact/client/scheme.ts b/typescript/packages/mechanisms/tron/src/exact/client/scheme.ts
index bca1a0e9..9dd92948 100644
--- a/typescript/packages/mechanisms/tron/src/exact/client/scheme.ts
+++ b/typescript/packages/mechanisms/tron/src/exact/client/scheme.ts
@@ -17,7 +17,7 @@ import { signTrc20ApprovalTransaction } from "./trc20approval";
  * Supports both EIP-3009-style TransferWithAuthorization and Permit2 flows.
  *
  * Routes to the appropriate authorization method based on
- * `requirements.extra.assetTransferMethod`. Defaults to `eip3009`.
+ * `requirements.extra.assetTransferMethod`. Defaults to `transferWithAuthorization`.
  */
 export class ExactTronScheme implements SchemeNetworkClient {
   readonly scheme = "exact";
@@ -43,11 +43,9 @@ export class ExactTronScheme implements SchemeNetworkClient {
     paymentRequirements: PaymentRequirements,
     context?: PaymentPayloadContext,
   ): Promise<PaymentPayloadResult> {
-    // Mark unused parameters to satisfy linter
-    void context;
-
-    const assetTransferMethod =
-      (paymentRequirements.extra?.assetTransferMethod as AssetTransferMethod) ?? "eip3009";
+    const assetTransferMethod = normalizeAssetTransferMethod(
+      paymentRequirements.extra?.assetTransferMethod as string | undefined,
+    );
 
     if (assetTransferMethod === "permit2") {
       const result = await createPermit2Payload(this.signer, x402Version, paymentRequirements);
@@ -112,3 +110,13 @@ export class ExactTronScheme implements SchemeNetworkClient {
     };
   }
 }
+
+function normalizeAssetTransferMethod(method?: string): AssetTransferMethod {
+  if (method === "permit2") {
+    return "permit2";
+  }
+  if (method === "tip712" || method === "eip3009") {
+    return "transferWithAuthorization";
+  }
+  return method === "transferWithAuthorization" ? method : "transferWithAuthorization";
+}
diff --git a/typescript/packages/mechanisms/tron/src/exact/facilitator/scheme.ts b/typescript/packages/mechanisms/tron/src/exact/facilitator/scheme.ts
index dda7c623..6faab007 100644
--- a/typescript/packages/mechanisms/tron/src/exact/facilitator/scheme.ts
+++ b/typescript/packages/mechanisms/tron/src/exact/facilitator/scheme.ts
@@ -34,7 +34,7 @@ export class ExactTronScheme implements SchemeNetworkFacilitator {
    * @returns The extra configuration object
    */
   getExtra(network: string): Record<string, unknown> | undefined {
-    const supportedMethods: string[] = ["eip3009"];
+    const supportedMethods: string[] = ["transferWithAuthorization"];
     const signers = this.signer.getAddresses();
     if (X402_PERMIT2_PROXY_ADDRESSES[network]) {
       supportedMethods.push("permit2");
diff --git a/typescript/packages/mechanisms/tron/src/exact/server/scheme.ts b/typescript/packages/mechanisms/tron/src/exact/server/scheme.ts
index d6be7b29..40860322 100644
--- a/typescript/packages/mechanisms/tron/src/exact/server/scheme.ts
+++ b/typescript/packages/mechanisms/tron/src/exact/server/scheme.ts
@@ -104,13 +104,16 @@ export class ExactTronScheme implements SchemeNetworkServer {
     const supportedMethods = supportedKind.extra?.supportedAssetTransferMethods as
       | string[]
       | undefined;
-    const existingMethod = paymentRequirements.extra?.assetTransferMethod as string | undefined;
+    const existingMethod = normalizeAssetTransferMethod(
+      paymentRequirements.extra?.assetTransferMethod as string | undefined,
+    );
+    const normalizedSupported = supportedMethods?.map(normalizeAssetTransferMethod);
     const method =
       existingMethod ??
-      (supportedMethods && supportedMethods.length > 0
-        ? supportedMethods.includes("eip3009")
-          ? "eip3009"
-          : supportedMethods[0]
+      (normalizedSupported && normalizedSupported.length > 0
+        ? normalizedSupported.includes("transferWithAuthorization")
+          ? "transferWithAuthorization"
+          : normalizedSupported[0]
         : undefined);
 
     if (!method) {
@@ -257,3 +260,11 @@ export class ExactTronScheme implements SchemeNetworkServer {
     return assetInfo;
   }
 }
+
+function normalizeAssetTransferMethod(method?: string): string | undefined {
+  if (!method) return undefined;
+  if (method === "tip712" || method === "eip3009") {
+    return "transferWithAuthorization";
+  }
+  return method;
+}
diff --git a/typescript/packages/mechanisms/tron/src/signer.ts b/typescript/packages/mechanisms/tron/src/signer.ts
index 59dd45a4..edf838bd 100644
--- a/typescript/packages/mechanisms/tron/src/signer.ts
+++ b/typescript/packages/mechanisms/tron/src/signer.ts
@@ -337,7 +337,7 @@ export function createFacilitatorTronSigner(
       return typeof txId === "string" ? txId : ((txId as { txid?: string }).txid ?? String(txId));
     },
     async waitForTransactionReceipt(args) {
-      const maxAttempts = 30;
+      const maxAttempts = 120;
       const delayMs = 1000;
 
       for (let attempt = 0; attempt < maxAttempts; attempt += 1) {
diff --git a/typescript/packages/mechanisms/tron/src/types.ts b/typescript/packages/mechanisms/tron/src/types.ts
index 2e5886bf..75f41154 100644
--- a/typescript/packages/mechanisms/tron/src/types.ts
+++ b/typescript/packages/mechanisms/tron/src/types.ts
@@ -1,9 +1,9 @@
 /**
  * Asset transfer methods for the exact TRON scheme.
- * - eip3009: Uses TransferWithAuthorization via TIP-712 (TRON equivalent of EIP-3009)
+ * - transferWithAuthorization: Uses TransferWithAuthorization via TIP-712
  * - permit2: Uses Permit2 + x402Permit2Proxy — universal fallback for any TRC-20
  */
-export type AssetTransferMethod = "eip3009" | "permit2";
+export type AssetTransferMethod = "transferWithAuthorization" | "permit2";
 
 // --- TIP-712 (TransferWithAuthorization) types ---
 
diff --git a/typescript/packages/mechanisms/tron/test/unit/exact/client.test.ts b/typescript/packages/mechanisms/tron/test/unit/exact/client.test.ts
index f3bd0e1a..2e031353 100644
--- a/typescript/packages/mechanisms/tron/test/unit/exact/client.test.ts
+++ b/typescript/packages/mechanisms/tron/test/unit/exact/client.test.ts
@@ -65,10 +65,10 @@ describe("ExactTronScheme (Client)", () => {
       expect(result.payload).not.toHaveProperty("permit2Authorization");
     });
 
-    it("should create TIP-712 payload with eip3009 method", async () => {
+    it("should create TIP-712 payload with transferWithAuthorization method", async () => {
       const reqs = {
         ...tip712Requirements,
-        extra: { ...tip712Requirements.extra, assetTransferMethod: "eip3009" },
+        extra: { ...tip712Requirements.extra, assetTransferMethod: "transferWithAuthorization" },
       };
       const client = new ExactTronScheme(mockSigner);
       const result = await client.createPaymentPayload(2, reqs);
diff --git a/typescript/packages/mechanisms/tron/test/unit/exact/facilitator.test.ts b/typescript/packages/mechanisms/tron/test/unit/exact/facilitator.test.ts
index 46c913ac..6978ed6b 100644
--- a/typescript/packages/mechanisms/tron/test/unit/exact/facilitator.test.ts
+++ b/typescript/packages/mechanisms/tron/test/unit/exact/facilitator.test.ts
@@ -177,10 +177,10 @@ describe("ExactTronScheme (Facilitator)", () => {
   });
 
   describe("getExtra", () => {
-    it("should return supportedAssetTransferMethods including eip3009", () => {
+    it("should return supportedAssetTransferMethods including transferWithAuthorization", () => {
       const extra = facilitator.getExtra("tron:nile");
       expect(extra).toBeDefined();
-      expect(extra!.supportedAssetTransferMethods).toContain("eip3009");
+      expect(extra!.supportedAssetTransferMethods).toContain("transferWithAuthorization");
     });
 
     it("should include permit2 when proxy address exists for network", () => {
@@ -192,7 +192,7 @@ describe("ExactTronScheme (Facilitator)", () => {
     it("should not include permit2 for unknown network without proxy", () => {
       const extra = facilitator.getExtra("tron:unknown");
       const methods = extra!.supportedAssetTransferMethods as string[];
-      expect(methods).toContain("eip3009");
+      expect(methods).toContain("transferWithAuthorization");
       expect(methods).not.toContain("permit2");
     });
   });
diff --git a/typescript/packages/mechanisms/tron/test/unit/exact/server.test.ts b/typescript/packages/mechanisms/tron/test/unit/exact/server.test.ts
index 09c69205..cd1aca30 100644
--- a/typescript/packages/mechanisms/tron/test/unit/exact/server.test.ts
+++ b/typescript/packages/mechanisms/tron/test/unit/exact/server.test.ts
@@ -128,11 +128,11 @@ describe("ExactTronScheme (Server)", () => {
           x402Version: 2,
           scheme: "exact",
           network: "tron:nile",
-          extra: { supportedAssetTransferMethods: ["eip3009", "permit2"] },
+          extra: { supportedAssetTransferMethods: ["transferWithAuthorization", "permit2"] },
         },
         [],
       );
-      expect(result.extra?.assetTransferMethod).toBe("eip3009");
+      expect(result.extra?.assetTransferMethod).toBe("transferWithAuthorization");
     });
 
     it("should not override existing assetTransferMethod", async () => {
@@ -142,7 +142,7 @@ describe("ExactTronScheme (Server)", () => {
           x402Version: 2,
           scheme: "exact",
           network: "tron:nile",
-          extra: { supportedAssetTransferMethods: ["eip3009", "permit2"] },
+          extra: { supportedAssetTransferMethods: ["transferWithAuthorization", "permit2"] },
         },
         [],
       );
@@ -157,7 +157,7 @@ describe("ExactTronScheme (Server)", () => {
           scheme: "exact",
           network: "tron:nile",
           extra: {
-            supportedAssetTransferMethods: ["eip3009", "permit2"],
+            supportedAssetTransferMethods: ["transferWithAuthorization", "permit2"],
             permit2FacilitatorAddress: "TSForFRqxmZdJ6Yfx2rNaFykhuQLc9cTMR",
           },
         },
@@ -168,7 +168,7 @@ describe("ExactTronScheme (Server)", () => {
       expect(result.extra?.permit2FacilitatorAddress).toBe("TSForFRqxmZdJ6Yfx2rNaFykhuQLc9cTMR");
     });
 
-    it("should use first method if eip3009 not in supported list", async () => {
+    it("should use first method if transferWithAuthorization not in supported list", async () => {
       const result = await server.enhancePaymentRequirements(
         baseRequirements,
         {