Context7 MCP

Context7 is the #1 most-viewed MCP server on FastMCP (11,000+ views). It solves one of the biggest frustrations with AI coding assistants: outdated documentation. Instead of relying on training data that may be months or years old, Context7 fetches current, version-specific docs and injects them directly into your AI's context. Features: - Fetch current documentation for any library or framework - Version-specific docs — get Next.js 15 docs, not Next.js 13 - Code examples directly from official sources - Supports thousands of libraries (React, Next.js, Vercel, Supabase, etc.) - Fast cached responses for popular libraries - Works with Claude Desktop, Cursor, Windsurf, and all MCP clients Real-world impact: Before Context7: Claude suggests deprecated Next.js 13 page router patterns After Context7: Claude adapts to Next.js 15 App Router with current APIs This is the single most impactful MCP server for developers who code with AI assistants daily. No API key required.