xsMCP

extra-small MCP SDK for quick client/server builds.

About

🚧 This project is under active development, stay tuned!

Why is there this project?

@modelcontextprotocol/sdk is large and has dependencies on libraries like zod, express, etc. that you probably don't even want to use.

Like xsAI, xsMCP does not force you to use a particular server or schema library and is very small.

Roadmap

Our current target is Streamable HTTP Client / Server (Waiting modelcontextprotocol/typescript-sdk#266 for testing), Stdio have lower priority.

Compatibility

xsMCP v0.1 is targeted to be compatible with the 2025-03-26 revision and is not backward compatible.

License

MIT

Third Party Licenses

This project partially copies code from the following projects: