How to Use Context7 MCP for Up-to-Date Docs
Fetch current, version-specific documentation for any library or framework directly into Claude Code's context using Context7 MCP — eliminate outdated API hallucinations.
What is the Context7 MCP?
Context7 is a documentation fetching service that retrieves up-to-date, version-specific docs for thousands of libraries and frameworks on demand. The Context7 MCP integrates this capability into Claude Code, ensuring that when you ask about a library's API, Claude fetches the actual current documentation rather than relying on potentially outdated training data — eliminating hallucinated method signatures and deprecated patterns.
Installation
mcpizy install context7Context7 is available without authentication for basic usage. An API key unlocks higher rate limits and private library documentation.
Key Capabilities
- Resolve library IDs — translate a library name like "nextjs" or "prisma" to its canonical Context7 identifier.
- Fetch topic-specific docs — retrieve focused documentation sections (e.g., "authentication" for Next.js, "migrations" for Prisma).
- Version-aware retrieval — fetch docs for a specific library version to avoid v2/v3 confusion.
- Broad framework coverage — supports React, Next.js, Tailwind, Prisma, Express, Django, Spring Boot, and thousands more.
Example Usage
Ask Claude to implement a feature using the latest Next.js App Router patterns:
// Claude will:
// 1. Call context7.resolve-library-id("nextjs")
// 2. Call context7.query-docs(libraryId, topic="app-router-data-fetching")
// 3. Read the current documentation
// 4. Implement the feature using verified, up-to-date patternsTips and Best Practices
- Mention the library name explicitly in your request so Claude knows to fetch its docs — e.g., "using Prisma 5" rather than just "using an ORM".
- Use topic-specific queries rather than fetching entire docs — targeted sections fit better in context and are more relevant.
- Combine with Tavily MCP for information not covered by official documentation (blog posts, community solutions, changelogs).
- For internal APIs or proprietary frameworks, explore Context7's private library ingestion feature.