Context7

upstash/context7

An MCP server that lets Claude Code, Cursor and similar tools fetch up-to-date official docs and examples for libraries, so AI writes fewer outdated APIs.

Why pick itSet it up once, then add "use context7" to a prompt. Especially useful for fast-moving frameworks like Next.js and React.

Install

GitHub: upstash/context7
Website: context7.com
Stars: ★ 63.6k
License: MIT
Language: TypeScript
Last push: Oct 23, 2026
Category: MCP & Agents

Good for

Give coding agents current, version-specific docs and examples for libraries
Reduce outdated or hallucinated APIs in generated code
Name a library ID or version in the prompt, such as Next.js 16
Search libraries and fetch docs directly with the ctx7 CLI

Getting started

Run claude mcp add context7 -- npx -y @upstash/context7-mcp (or npx ctx7 setup, which needs Node.js 22.13+)
Add "use context7" to your prompt, for example when asking about Next.js or Supabase
To trigger it automatically, add a rule in CLAUDE.md telling the agent to always use Context7 for library docs

Before you install

A free API key from context7.com/dashboard is recommended for higher rate limits.

Summarized by AI from the project docs; check the official docs before relying on it.

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