Context7 (Library Documentation)

Use Context7 to query up-to-date documentation for any library before implementing code.

Tools

Tool Purpose

context7_resolve_library_id

Find the Context7 ID for a library

context7_get_library_docs

Query documentation for a specific topic

Workflow

Always query docs before implementing:

1. resolve_library_id({ libraryName: "effect typescript" }) → Returns: /effect-ts/effect

2. get_library_docs({ context7CompatibleLibraryID: "/effect-ts/effect", topic: "schema validation" }) → Returns: Up-to-date documentation

Common Library IDs

Library Context7 ID

Effect /effect-ts/effect

Better Auth /better-auth/better-auth

Next.js /vercel/next.js

React /facebook/react

TanStack Query /tanstack/query

Drizzle ORM /drizzle-team/drizzle-orm

Elysia elysiajs

Axum /tokio-rs/axum

Best Practices

• Always resolve first - Don't guess library IDs

• Be specific with topics - "schema validation" not just "validation"

• Query before coding - Get current patterns, not outdated knowledge

• Check multiple topics - Query auth, then session, then middleware separately

Example Queries

React patterns

get_library_docs({ libraryId: "/facebook/react", topic: "useEffect cleanup" })

Authentication

get_library_docs({ libraryId: "/better-auth/better-auth", topic: "next.js integration" })

Type-safe APIs

get_library_docs({ libraryId: "/effect-ts/effect", topic: "tagged errors" })