# 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 Eliminates hallucinations from outdated training data.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.

## Install

Merge the JSON below into your `.mcp.json`:

## Quick Use

```json
{
  "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 Instead of relying on outdated training data, your AI assistant fetches real documentation for React, Next.js, Python, Node.js, and 1,000+ other libraries in real-time.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 AI generates code based on current docs — not outdated training data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](https://github.com/upstash). Licensed under MIT.
> [upstash/context7](https://github.com/upstash/context7) — 51,000+ GitHub stars

---
Source: https://tokrepo.com/en/workflows/80630bbc-db0f-4254-bed5-8e5b639e5a34
Author: MCP Hub