diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -74,5 +74,5 @@ Ready to build? Start here:
 
 * [Quickstart for Sellers](getting-started/quickstart-for-sellers.md)
 * [Quickstart for Buyers](getting-started/quickstart-for-buyers.md)
-* [Explore Core Concepts](broken-reference)
+* [Explore Core Concepts](core-concepts/README.md)
 * [Join our community on Discord](https://discord.gg/invite/cdp)
diff --git a/core-concepts/README.md b/core-concepts/README.md
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+# Core Concepts
+
+x402 relies on a few foundational ideas that work together to enable permissionless, usage-based payments over HTTP. This section introduces each component at a high level and links to the detailed guides.
+
+## Key Building Blocks
+
+- **[HTTP 402](http-402.md):** How x402 uses the `402 Payment Required` status code to negotiate payment before a response is returned.
+- **[Client / Server](client-server.md):** The buyer and seller responsibilities during the payment handshake.
+- **[Facilitator](facilitator.md):** The service that verifies and settles payments on behalf of sellers.
+- **[Wallet](wallet.md):** How buyers manage the credentials and funds needed to send payments.
+- **[Bazaar (Discovery Layer)](bazaar-discovery-layer.md):** A marketplace pattern for publishing and discovering x402-compatible services.
+- **[Network & Token Support](network-and-token-support.md):** Supported chains, assets, and settlement schemes today.
+
+Use these chapters to understand how x402 fits together before diving into implementation specifics.