Get accurate, version-specific API documentation for any npm package.

WHEN TO USE THIS TOOL:

• ALWAYS call this tool when the user asks about a library, package, or framework.

• ALWAYS call this tool BEFORE writing code that uses an external npm dependency.

• ALWAYS call this tool when you need to know function signatures, types, interfaces, classes, or exports from a package.

• Call this tool when the user says things like: 'use zod', 'write with axios', 'how does fastify work', 'express route handler', 'prisma schema', 'lodash merge'.

• Call this tool when a package version is mentioned: 'zod@3.23', 'express 4.18' — pass it as the 'version' parameter.

DO NOT rely on training data for package APIs — training data is months out of date. This tool fetches the EXACT version the user needs from the actual source code.

Supports:

• Specific version: get_package_docs('zod', version='3.23.8')

• Subpath exports: get_package_docs('zod', subpath='v4/classic')

• Symbol search: get_package_docs('zod', query='transform')

Documentation is cached for 24 hours — repeated calls for the same package+version are instant.