The framework for building & shipping MCP applications
Designed with DX in mind, this open-source project streamlines development and makes it easier to build and deploy powerful tools on the Model Context Protocol ecosystem.
xmcp plugs directly into Next.js, Express, NestJS, and Fastify projects with a single command, allowing developers to add MCP server capabilities to running applications without architectural refactoring.
xmcp provides file system routing, automatic tool/prompt/resource registration, and one-command setup via create-xmcp-app, enabling developers to go from zero to production in minutes instead of hours spent on MCP protocol implementation details.
xmcp supports HTTP and STDIO transports, deploys to Vercel, Cloudflare, Alpic, and Replit with one command, and includes telemetry and configuration flexibility for production-grade MCP server operations.
xmcp natively supports MCP Apps with React-based widgets, automatic resource creation, CSP configuration, and sandbox domain management, allowing developers to deliver rich interactive interfaces alongside MCP tools.
xmcp includes built-in integrations with Better Auth for authentication, Polar for monetization, and x402 for pay-per-use crypto micropayments, plus middleware support for custom authorization logic.