PluginBench
MCP Server
Active
MIT

Context7 MCP Server

io.github.upstash/context7

Up-to-date code docs and API references injected directly into your AI coding prompts.

RepositoryRegistry

What is the Context7 MCP server?

Context7 is an MCP server that provides up-to-date, version-specific documentation and code examples for libraries and frameworks directly within your AI coding assistant. It resolves library names to their documentation and retrieves relevant code snippets and API references based on your queries, eliminating hallucinated APIs and outdated information.

Context7 solves the problem of LLMs generating code based on outdated training data by fetching current documentation and examples from library sources. Instead of getting generic or incorrect API suggestions, you get real, version-specific docs injected into your prompts. Works with Cursor, Claude, and other coding agents via MCP or CLI.

How to install Context7

Copy-paste configuration for popular MCP clients.

transport: stdio
Config generated by PluginBench — verify against the source before use.
Environment / auth
  • CONTEXT7_API_KEY
    secret

    API key for authentication

  • Authorization
    secret

    API key for authentication. Accepts "Bearer <key>" or the raw key.

~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "context7": {
      "command": "npx",
      "args": [
        "-y",
        "@upstash/context7-mcp"
      ],
      "env": {
        "CONTEXT7_API_KEY": "<YOUR_CONTEXT7_API_KEY>",
        "Authorization": "<YOUR_AUTHORIZATION>"
      }
    }
  }
}

Tools & capabilities

Tools this server exposes to the agent.

  • resolve-library-id — Resolves a general library name into a Context7-compatible library ID using the user's question for relevance ranking.
  • query-docs — Retrieves documentation for a library using its Context7-compatible library ID and returns relevant docs for a given query.

Use cases

  • Generate Next.js middleware code with current API patterns by fetching up-to-date Next.js documentation
  • Set up Supabase authentication with accurate, version-specific code examples instead of hallucinated APIs
  • Configure Cloudflare Workers with correct syntax and current best practices from official docs
  • Implement MongoDB queries with the exact API for your installed version
  • Create accurate code for any library without tab-switching or manual documentation lookup

Context7 MCP server FAQ

What does Context7 do?

Context7 fetches up-to-date, version-specific documentation and code examples from library sources and injects them into your AI coding assistant's context. This prevents hallucinated APIs and outdated code generation.

Is Context7 free?

Yes, Context7 is free to use. A free API key is available at context7.com/dashboard for higher rate limits; unauthenticated use is also supported but with lower limits.

How do I install Context7 in Cursor or Claude?

Run `npx ctx7 setup` and choose your coding agent (Cursor, Claude, or OpenCode). It authenticates via OAuth and installs the MCP server or CLI skill automatically. Alternatively, manually add the MCP server URL `https://mcp.context7.com/mcp` with your API key.

Does Context7 require authentication?

An API key is recommended for higher rate limits but not required. You can get a free API key at context7.com/dashboard, or use Context7 unauthenticated with lower rate limits.

How do I specify which library or version I want docs for?

Add the library ID to your prompt (e.g., 'use library /supabase/supabase') or mention the version (e.g., 'Next.js 14'). Context7 will automatically match and fetch the correct documentation.

What libraries does Context7 support?

Context7 supports hundreds of popular libraries including Next.js, Supabase, MongoDB, Cloudflare Workers, and many others. You can submit additional libraries at context7.com/docs/adding-libraries.

README (reference)

Source of truth, from the repository.

Cover

Install MCP Server

Context7 Platform - Up-to-date Code Docs For Any Prompt

Website NPM Version MIT licensed

繁體中文 简体中文 日本語 한국어 문서 Documentación en Español Documentation en Français Documentação em Português (Brasil) Documentazione in italiano Dokumentasi Bahasa Indonesia Dokumentation auf Deutsch Документация на русском языке Українська документація Türkçe Doküman Arabic Documentation Tiếng Việt

❌ Without Context7

LLMs rely on outdated or generic information about the libraries you use. You get:

  • ❌ Code examples are outdated and based on year-old training data
  • ❌ Hallucinated APIs that don't even exist
  • ❌ Generic answers for old package versions

✅ With Context7

Context7 pulls up-to-date, version-specific documentation and code examples straight from the source — and places them directly into your prompt.

Create a Next.js middleware that checks for a valid JWT in cookies
and redirects unauthenticated users to `/login`. use context7

Configure a Cloudflare Worker script to cache
JSON API responses for five minutes. use context7

Show me the Supabase auth API for email/password sign-up.

Context7 fetches up-to-date code examples and documentation right into your LLM's context. No tab-switching, no hallucinated APIs that don't exist, no outdated code generation.

Works in two modes:

  • CLI + Skills — installs a skill that guides your agent to fetch docs using ctx7 CLI commands (no MCP required)
  • MCP — registers a Context7 MCP server so your agent can call documentation tools natively

Installation

[!NOTE] API Key Recommended: Get a free API key at context7.com/dashboard for higher rate limits.

Set up Context7 for your coding agents with a single command. The ctx7 CLI requires Node.js 18 or newer.

npx ctx7 setup

Authenticates via OAuth, generates an API key, and installs the appropriate skill. You can choose between CLI + Skills or MCP mode. Use --cursor, --claude, or --opencode to target a specific agent.

To remove the generated setup later, run npx ctx7 remove. If you globally installed the CLI with npm install -g ctx7, remove that package separately with npm uninstall -g ctx7.

To configure manually, use the Context7 server URL https://mcp.context7.com/mcp with your MCP client and pass your API key via the Authorization: Bearer YOUR_API_KEY header. See the link below for client-specific setup instructions.

Manual Installation / Other Clients →

Important Tips

Use Library Id

If you already know exactly which library you want to use, add its Context7 ID to your prompt. That way, Context7 can skip the library-matching step and directly retrieve docs.

Implement basic authentication with Supabase. use library /supabase/supabase for API and docs.

The slash syntax tells Context7 exactly which library to load docs for.

Specify a Version

To get documentation for a specific library version, just mention the version in your prompt:

How do I set up Next.js 14 middleware? use context7

Context7 will automatically match the appropriate version.

Add a Rule

If you installed via ctx7 setup, a skill is configured automatically that triggers Context7 for library-related questions. To set up a rule manually instead, add one to your coding agent:

  • Cursor: Cursor Settings > Rules
  • Claude Code: CLAUDE.md
  • Or the equivalent in your coding agent

Example rule:

Always use Context7 when I need library/API documentation, code generation, setup or configuration steps without me having to explicitly ask.

Available Tools

CLI Commands

  • ctx7 library <name> <query>: Searches the Context7 index by library name and returns matching libraries with their IDs.
  • ctx7 docs <libraryId> <query>: Retrieves documentation for a library using a Context7-compatible library ID (e.g., /mongodb/docs, /vercel/next.js).

MCP Tools

  • resolve-library-id: Resolves a general library name into a Context7-compatible library ID.
    • query (required): The user's question or task (used to rank results by relevance)
    • libraryName (required): The name of the library to search for
  • query-docs: Retrieves documentation for a library using a Context7-compatible library ID.
    • libraryId (required): Exact Context7-compatible library ID (e.g., /mongodb/docs, /vercel/next.js)
    • query (required): The question or task to get relevant documentation for

More Documentation

Packages

Disclaimer

1- Context7 projects are community-contributed and while we strive to maintain high quality, we cannot guarantee the accuracy, completeness, or security of all library documentation. Projects listed in Context7 are developed and maintained by their respective owners, not by Context7. If you encounter any suspicious, inappropriate, or potentially harmful content, please use the "Report" button on the project page to notify us immediately. We take all reports seriously and will review flagged content promptly to maintain the integrity and safety of our platform. By using Context7, you acknowledge that you do so at your own discretion and risk.

2- This repository hosts the MCP server’s source code. The supporting components — API backend, parsing engine, and crawling engine — are private and not part of this repository.

🤝 Connect with Us

Stay updated and join our community:

📺 Context7 In Media

📄 License

MIT

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