context7-mcp

Research

Always use Context7 MCP to fetch up-to-date library/API documentation before generating code that depends on external libraries or config. Use when the user asks for setup steps, configuration, or code involving third-party libraries. Prefer Context7 docs over memory. Include citations to the retrieved docs when possible.

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Context7 MCP (Up-to-date docs)

Default behavior

Whenever the task involves any external library/framework:

Next.js, React, Vite
Supabase SDK
PyMuPDF, pdfplumber
Tailwind, shadcn/ui
FastAPI, Pydantic
Anthropic SDK
Any npm/pip package

Do this:

Resolve the correct library ID in Context7
Pull the relevant docs snippet(s)
Only then generate code/config
If docs conflict with assumptions, prefer docs

Setup (if not installed)

Remote server (recommended)

claude mcp add --transport http context7 https://mcp.context7.com/mcp --header "CONTEXT7_API_KEY: YOUR_API_KEY"

Local server (npx)

claude mcp add context7 -- npx -y @upstash/context7-mcp --api-key YOUR_API_KEY

API key is optional for basic usage, but helps with rate limits/private repos.

Available tools

resolve-library-id

Find the correct library identifier:

Input: "react" or "fastapi"
Output: library ID to use with get-library-docs

get-library-docs

Fetch documentation for a library:

Input: library ID + optional topic filter
Output: relevant documentation snippets

Usage patterns

Before writing code

1. User asks: "Add Supabase auth to the app"
2. Claude: resolve-library-id("supabase")
3. Claude: get-library-docs(id, topic="authentication")
4. Claude: Generate code based on current docs

When docs conflict with memory

Always prefer Context7 docs (more recent)
Mention the source version when relevant
If uncertain, cite the doc snippet

Recommended rule (add to CLAUDE.md)

"Always use Context7 when I need code generation, setup or configuration steps, or library/API documentation."

Output requirements

When Context7 is used:

State what library/topic was looked up
Cite version if available
Use precise, version-aware steps from docs

Common libraries for DeepRead

Library	Use case
`anthropic`	Claude API integration
`fastapi`	Backend API routes
`pydantic`	Data validation
`pymupdf`	PDF parsing
`react`	Frontend components
`vite`	Build tool
`tailwindcss`	Styling
`supabase-js`	Database client