diff --git a/constants/contracts.js b/constants/contracts.js
deleted file mode 100644
index d886213..0000000
--- a/constants/contracts.js
+++ /dev/null
@@ -1,6 +0,0 @@
-const addresses = {
-    dai: '0x7Af456bf0065aADAB2E6BEc6DaD3731899550b84',
-    usdt: '0x74a3dbd5831f45CD0F3002Bb87a59B7C15b1B5E6',
-    usdc: '0x265566D4365d80152515E800ca39424300374A83',
-}
-module.exports = {addresses}
diff --git a/index.js b/index.js
index 489aebe..b52b360 100644
--- a/index.js
+++ b/index.js
@@ -1,9 +1,11 @@
+const {program} = require('commander');
 const express = require('express')
 const path = require('path')
 const cors = require('cors')
 const bodyParser = require('body-parser');
 const {initContract, claimTestToken} = require('./utils/contract')
 const {validClaimArgs} = require('./utils/address')
+const fs = require("fs");
 const log = console.log.bind(console)
 const port = 3089
 const app = express()
@@ -30,6 +32,13 @@ app.get('/', (req, res) => {
     res.sendFile(path.join('index.html'));
 })
 
+app.get('/tokens', (req, res) => {
+    log('receive a request get /tokens: ')
+    res.json({
+        tokens: allTokens
+    });
+})
+
 app.post('/api/claimTestToken', (req, res) => {
     const params = req.body
     log('receive a request: ', params)
@@ -49,9 +58,18 @@ app.post('/api/claimTestToken', (req, res) => {
     )
 })
 
+const defaultConfig = './config.json';
+
+let allTokens = [];
 
 const main = async () => {
-    await initContract()
+    const {config} = program
+        .option('-c, --config <config>', 'config path', defaultConfig)
+        .parse(process.argv)
+        .opts()
+    const { tokens } = JSON.parse(fs.readFileSync(config).toString());
+    await initContract(tokens)
+    allTokens = Object.assign(tokens, []);
 
     app.listen(port, () => {
         log(`Faucet server listening at http://localhost:${port}`)
diff --git a/package.json b/package.json
index 131f1ee..4646499 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,7 @@
   "license": "ISC",
   "dependencies": {
     "body-parser": "^1.19.0",
+    "commander": "^9.4.0",
     "cors": "^2.8.5",
     "dotenv": "^8.2.0",
     "ethers": "^5.0.23",
diff --git a/utils/contract.js b/utils/contract.js
index 2a1754c..e430d69 100644
--- a/utils/contract.js
+++ b/utils/contract.js
@@ -1,16 +1,15 @@
 require('dotenv').config()
 const ethers = require("ethers");
 const erc20Abi = require("../constants/abi/erc20.json")
-const {addresses} = require("../constants/contracts")
 
 let provider, wallet
 const contracts = {}
 
-const initContract = async () => {
+const initContract = async (tokens) => {
     provider = await ethers.getDefaultProvider(process.env.RINKEBY_API);
     wallet = new ethers.Wallet(process.env.RINKEBY_DEPLOYER_PRIVATE_KEY, provider)
-    Object.entries(addresses).forEach(([tokenName, tokenAddress]) => {
-        contracts[tokenAddress] = ethers.ContractFactory.getContract(tokenAddress, erc20Abi, wallet)
+    tokens.map((token) => {
+        contracts[token.address] = ethers.ContractFactory.getContract(token.address, erc20Abi, wallet)
     })
 }
 
diff --git a/yarn.lock b/yarn.lock
index 3ee9d65..ff100e6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -392,6 +392,11 @@ bytes@3.1.0:
   resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.1.0.tgz#f6cf7933a360e0588fa9fde85651cdc7f805d1f6"
   integrity sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg==
 
+commander@^9.4.0:
+  version "9.4.0"
+  resolved "https://registry.npmmirror.com/commander/-/commander-9.4.0.tgz#bc4a40918fefe52e22450c111ecd6b7acce6f11c"
+  integrity sha512-sRPT+umqkz90UA8M1yqYfnHlZA7fF6nSphDtxeywPZ49ysjxDQybzk13CL+mXekDRG92skbcqCLVovuCusNmFw==
+
 content-disposition@0.5.3:
   version "0.5.3"
   resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.3.tgz#e130caf7e7279087c5616c2007d0485698984fbd"