@modelcontextprotocol/sdk 1.21.2

Model Context Protocol implementation for TypeScript

@modelcontextprotocol/sdk@1.21.2 was published on 2025-11-13. Its manifest declares 13 runtime dependencies and 1 peer requirement. Bundled type declarations are not declared in the inspected metadata. The declared Node.js requirement is >=18.

All @modelcontextprotocol/sdk versions · Permanent reference to 1.21.2 · Latest release

Package specifications

Version1.21.2
License declarationMIT
Published2025-11-13T20:28:47.830Z
Node.js requirement>=18
Type declarationsNot declared
Runtime dependency count13
Peer requirement count1
Optional dependency count0
Minified sizeMeasurement not available yet
Minified + gzipMeasurement not available yet
Unpacked distribution size9039.92 KiB
Published file count461
Package typemodule
ES module entryNot declared
Default entryNot declared
Side effects declarationNot declared
Direct advisories8
Resolved graph dependencies92
Repository stars13633
Repository forks2317

Install @modelcontextprotocol/sdk 1.21.2

npm install @modelcontextprotocol/sdk@1.21.2
pnpm add @modelcontextprotocol/sdk@1.21.2
yarn add @modelcontextprotocol/sdk@1.21.2

Runtime dependencies

Peer requirements

Optional dependencies

  • None declared

Resolved dependency graph

This deps.dev graph describes a generic 64-bit Linux environment, not your application lockfile.

How to interpret the specifications

Bundlephobia measurements use its standard package build and may exclude peer dependencies. Unpacked npm distribution size includes shipped files and is a different measurement. Module declarations do not prove tree-shaking or runtime compatibility.

Advisories apply to this package version directly; transitive dependencies need separate inspection. Repository signals describe the whole repository and are current observations, including on historical-version pages.

Known direct advisories

Evidence and freshness