@modelcontextprotocol/server
The MCP (Model Context Protocol) TypeScript server SDK. Build MCP servers that expose tools, resources, and prompts.
[!WARNING] This is a beta release. The API surface is settling but breaking changes remain possible until v2 stabilizes. Please try it and open issues — feedback during the beta directly shapes the stable release.
[!NOTE] This is v2 of the MCP TypeScript SDK. It replaces the monolithic
@modelcontextprotocol/sdkpackage from v1. See the migration guide if you're coming from v1.
Install
npm install @modelcontextprotocol/server@beta
TypeScript ≥6.0 no longer auto-includes @types/* — add "types": ["node"] to your tsconfig.json compilerOptions (the published .d.mts references Buffer).
Optional framework adapters: @modelcontextprotocol/express, @modelcontextprotocol/hono,
@modelcontextprotocol/node.
Documentation
- Repository README — overview, package layout, examples
- Server guide — tools, resources, prompts, and the rest of the server surface
- Serving guide — stdio, HTTP, the framework adapters, sessions, and authorization
- API reference
- MCP specification
Source: packages/server/README.md