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Context7
Up-to-date documentation for any library injected straight into the agent context — no more stale-API code.
Claude Code Cursor Windsurf Gemini CLI
Overview
Context7 by Upstash is an MCP server that fixes the biggest weakness of coding agents: stale knowledge. Models are trained on older library versions, so they generate code against changed or removed APIs. Context7 fetches official, version-specific documentation for the exact library you use and injects it into the agent context right when it is needed.
Usage is simple: add use context7 to a prompt, or let the agent call it automatically whenever it works with a library — it pulls the relevant docs pages and examples for the pinned version. The result is code written against the current API instead of training-data guesses.
It became one of the most-used MCP servers in the world because it measurably improves generated-code accuracy with fast-moving frameworks like Next.js, Astro and Tailwind.
Usage is simple: add use context7 to a prompt, or let the agent call it automatically whenever it works with a library — it pulls the relevant docs pages and examples for the pinned version. The result is code written against the current API instead of training-data guesses.
It became one of the most-used MCP servers in the world because it measurably improves generated-code accuracy with fast-moving frameworks like Next.js, Astro and Tailwind.
Who Is This For?
- Developers on fast-moving frameworks like Next.js and Astro
- Teams suffering from generated code that targets removed APIs
- Developers learning a new library who want official examples
- Any project on versions newer than what the model knows
Installation
Setup for Claude Code
Add to .claude/settings.json:
{"mcpServers":{"context7":{"command":"npx","args":["-y","@upstash/context7-mcp"]}}}Configuration
CONTEXT7_API_KEY=ctx7_xxxx (optional — raises rate limits)Explore AI Tools
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