# x402

## x402

- [Documentation Agent Instructions](https://x402.gitbook.io/x402/agents.md)
- [FAQ](https://x402.gitbook.io/x402/faq.md)
- [Welcome to x402](https://x402.gitbook.io/x402/introduction.md): This guide will help you understand x402, the open payment standard, and help you get started building or integrating services with x402.
- [core-concepts](https://x402.gitbook.io/x402/core-concepts.md)
- [Client / Server](https://x402.gitbook.io/x402/core-concepts/client-server.md): This page explains the roles and responsibilities of the \*\*client\*\* and \*\*server\*\* in the x402 protocol.
- [Facilitator](https://x402.gitbook.io/x402/core-concepts/facilitator.md): This page explains the role of the \*\*facilitator\*\* in the x402 protocol.
- [HTTP 402](https://x402.gitbook.io/x402/core-concepts/http-402.md): For decades, HTTP 402 Payment Required has been reserved for future use. x402 unlocks it, and \[absolves the internet of its original sin]\(https://economyofbits.substack.com/p/marc-andreessens-original
- [Wallet](https://x402.gitbook.io/x402/core-concepts/wallet.md): This page explains the role of the \*\*wallet\*\* in the x402 protocol.
- [guides](https://x402.gitbook.io/x402/guides.md)
- [MCP Server with x402](https://x402.gitbook.io/x402/guides/mcp-server-with-x402.md): \[Model Context Protocol (MCP)]\(https://modelcontextprotocol.io/) is a protocol for passing context between LLMs and other AI agents. This page shows how to use the x402 payment protocol with MCP to ma