LangChain Knowledge

Semantic search across LangChain, LangGraph, LangSmith, and DeepAgents documentation and source code.

LangChain Knowledge provides four MCP tools for searching documentation and source code across the LangChain ecosystem, including LangChain, LangGraph, LangSmith, and DeepAgents. Each tool supports query strings and language filtering (Python or JavaScript). The server is available as an npm package via stdio transport.