Product / UX / Agent tools & protocols

MCP TypeScript SDK

Official TypeScript SDK for the Model Context Protocol (Node, Bun, Deno), providing server and client libraries with tools/resources/prompts, Streamable-HTTP + stdio transports, auth helpers, and Express/Hono/Node middleware. The most-downloaded MCP package by a wide margin.

MIT (@modelcontextprotocol/sdk). ~13k stars, ~154M npm downloads/last-30-days.

Openness

5 high confidence

5.0

license: MIT(OSI)
source: public
core-gated: ungated

Fully MIT reference SDK.

https://www.npmjs.com/package/@modelcontextprotocol/sdk recorded 2026-06-17
MIT, ~154M downloads/30d

Adoption

5 high confidence

5.0

~154M npm downloads in the last 30 days.

https://www.npmjs.com/package/@modelcontextprotocol/sdk recorded 2026-06-17
~154.2M downloads/last-30-days

Capability

5 high confidence

5.0

Feature parity with the Python SDK; the canonical JS/TS MCP implementation.

https://github.com/modelcontextprotocol/typescript-sdk recorded 2026-06-17
feature set: client/server, multi-runtime, transports

Unchanged since 2026-07-30 (last edited, not re-checked)