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Changelog
xmcp v1 is here
xmcp v1 splits the compiler out of the runtime, moves to MCP revision 2026-07-28 through SDK v2, and keeps every existing tool, prompt and resource working unchanged.
The field notes / Blog
Blog
Read the latest updates and engineering notes about xmcp. For tutorials and comparisons, explore the MCP guides.
Guides
From TypeScript functions to MCP tools
Reuse typed functions as MCP tools with experimental schema inference in xmcp. Generate input validation from TypeScript and JSDoc, and keep explicit schemas where you need them.
Engineering
When your agent has to pay
Charging for a tool is the easy half. The real shift is software that pays for tools on its own — how x402 lets agents settle USDC micropayments per call.
Guides
Integrating NestJS with xmcp
Add an MCP server to your NestJS application with tool discovery and a customizable module.
Engineering
Pay-per-use MCP tools with x402
Charge per tool call using x402 crypto micropayments with USDC on Base — gate your MCP tools behind HTTP 402 payment-required middleware.
How to build an MCP App
Securing Your MCP Server
When tools need UIs
How to submit your ChatGPT MCP app
Everything we shipped so far
Monetize your GPT apps with Stripe
Running DOOM in ChatGPT: A Step-by-Step Guide
Connect to external MCPs and make their tools yours
OpenAI Apps SDK Support
Integrating Polar with xmcp
xmcp v0.3.0 — Tools, Prompts, and Resources
Deploy to Vercel with zero-configuration
Integrating Better Auth with xmcp
