Part 4: Context7 — Live Documentation
Context7 is a game-changer. It gives Claude access to up-to-date documentation for any library.
The Problem
Claude's training data has a cutoff. When you ask about:
- A library released after training
- Recent API changes
- New framework features
Claude might give outdated or incorrect information.
The Solution
Context7 fetches live documentation:
You: "Using context7, show me how to use the new Next.js 15 cache API"
Claude: *fetches current Next.js docs*
*provides accurate, up-to-date code*Installation
claude mcp add context7 -- npx -y @anthropic-ai/context7-mcpUsage Patterns
| Pattern | Example |
|---|---|
| Explicit | "Using context7, look up Prisma's createMany" |
| Research | "Check context7 for React Server Components patterns" |
| Debugging | "Use context7 to find the correct Tailwind v4 syntax" |
Add to Global CLAUDE.md
## Documentation Lookup
When unsure about library APIs or recent changes:
1. Use Context7 MCP to fetch current documentation
2. Prefer official docs over training knowledge
3. Always verify version compatibilityPro tip: Context7 works best when you're explicit about what you need. Instead of "how do I use React hooks?", try "Using context7, show me the useOptimistic hook from React 19".