Context7

Retrieve current documentation for software libraries by querying the Context7 API. This is especially useful when you're unsure about an API's current interface — library docs change frequently and your training data may be outdated.

Requires CONTEXT7_API_KEY environment variable.

When to Use

• Looking up how a library function works (e.g., "how does useEffect cleanup work?")
• Checking if an API has changed in a newer version
• Finding code examples for a specific library feature
• Verifying correct import paths or function signatures
• Installing or configuring a library and needing setup docs

When NOT to Use

• General programming questions (e.g., "how do closures work in JS?")
• Questions about your own project's internal code
• Topics unrelated to a specific open-source library or framework