MCP ConfigsMar 31, 2026·2 min read

Context7 — Up-to-Date Docs MCP for AI Editors

MCP server that provides AI code editors with up-to-date library documentation. Eliminates hallucinations from outdated training data. Supports 1000+ libraries. 51K+ stars.

TO
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Quick Use

Use it first, then decide how deep to go

This block should tell both the user and the agent what to copy, install, and apply first.

{
  "mcpServers": {
    "context7": {
      "command": "npx",
      "args": ["-y", "@context7/mcp@latest"]
    }
  }
}

Add to your Claude Code, Cursor, or Windsurf MCP config. Then ask: "Using context7, show me how to use React Server Components."

Intro

Context7 is an MCP server that gives AI code editors access to up-to-date, version-specific library documentation. Instead of relying on outdated training data, your AI assistant fetches real documentation for React, Next.js, Python, Node.js, and 1,000+ other libraries in real-time. Eliminates code hallucinations caused by stale API knowledge. 51,000+ GitHub stars, MIT licensed.

Best for: Any developer using AI coding tools who wants accurate, current documentation Works with: Claude Code, Cursor, Windsurf, Gemini CLI, any MCP client

How It Works

  1. You ask your AI assistant about a library (e.g., "How do I use Next.js App Router?")
  2. Context7 MCP fetches the latest documentation for that library version
  3. AI generates code based on current docs — not outdated training data

Why It Matters

  • React 19 patterns differ from React 18 — training data may be stale
  • Next.js 15 App Router has different APIs than Pages Router
  • Python 3.12 has features LLMs don't know about

Supported Libraries

1,000+ libraries indexed and updated continuously: React, Next.js, Vue, Svelte, Angular, Node.js, Express, FastAPI, Django, Flask, TailwindCSS, Prisma, Drizzle, PostgreSQL, MongoDB, Redis, Docker, Kubernetes, Terraform, AWS SDK, and many more.

FAQ

Q: What is Context7? A: An MCP server providing AI code editors with real-time, up-to-date library documentation. Eliminates hallucinations from stale training data. 1,000+ libraries supported. 51K+ stars.

Q: Does it slow down my AI responses? A: Minimal latency — documentation is pre-indexed and cached. Most lookups complete in under 500ms.

🙏

Source & Thanks

Created by Upstash. Licensed under MIT. upstash/context7 — 51,000+ GitHub stars

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