Context7 MCP

Name: Context7 MCP
Author: Upstash

by Upstash

Up-to-date, version-specific code documentation for any library — right in your AI assistant

code Node.js Beginner No API key Verified Featured

⭐ 47.2k stars 📅 Updated: 1mo ago

View on GitHub View package

Description

Context7 is an MCP server by Upstash that provides LLMs with up-to-date, version-specific code documentation for any library. It solves one of the biggest pain points in AI-assisted coding: models generating code based on outdated training data, hallucinating APIs that don't exist, or using deprecated patterns. Instead of relying on stale knowledge, Context7 fetches current documentation directly from source and injects it into the AI's context window. Works with 30+ MCP-compatible clients. Available as both a local stdio server via npx and a remote HTTP endpoint at context7.com — no API key required. Simply add "use context7" to your prompt and the AI will automatically pull the latest docs for the libraries you're working with.

✅ Best for

Any developer using AI coding assistants who wants accurate, current library documentation in every prompt

⏭️ Skip if

You only work with well-established libraries whose APIs rarely change

💡 Use cases

Getting accurate, current API documentation while coding with AI assistants
Avoiding hallucinated or deprecated API calls in AI-generated code
Working with newly released library versions that the AI hasn't been trained on
Quickly referencing documentation for unfamiliar libraries during development

👍 Pros

✓ No API key required — completely free to use
✓ Solves the critical problem of outdated AI training data for library APIs
✓ Dual deployment — local npx or remote HTTP, both zero-config
✓ Supports 30+ MCP clients with massive community adoption (47k+ stars)

👎 Cons

✗ Documentation coverage depends on libraries being indexed by Context7
✗ Large documentation payloads may consume significant context window space
✗ Niche or private libraries may not be available in the index

🔧 Exposed tools (2 tools)

Tool	Category	Description
resolve-library-id	discovery	Convert a library name to its Context7-compatible identifier
query-docs	documentation	Retrieve up-to-date documentation for a specific library and version

⚡ Installation

Prerequisites:

• Node.js v18+

Check Claude Code documentation to configure this MCP server.

💡 Tips & tricks

Add "use context7" to your prompts to automatically trigger documentation lookup. The resolve-library-id tool helps when library names are ambiguous — use it first to confirm you're getting docs for the right package.

🔄 Alternatives

devdocs-mcp

MCP server — editorial content pending

Similar functionality

docfork-mcp