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Comprehensive API reference documentation for the LangChain and LangGraph Python and TypeScript libraries.

Reference sites

https://mintcdn.com/langchain-5e9cc07a-preview-docsop-1783847326-6a62893/BKFNguH5UONiM5tY/images/brand/deep-agents-icon.png?fit=max&auto=format&n=BKFNguH5UONiM5tY&q=85&s=99f305cfe58674d614c73d78dcf0fcc8

Deep Agents

Build agents that can plan, use subagents, and leverage file systems for complex tasks.
https://mintcdn.com/langchain-5e9cc07a-preview-docsop-1783847326-6a62893/BKFNguH5UONiM5tY/images/brand/langchain-icon.png?fit=max&auto=format&n=BKFNguH5UONiM5tY&q=85&s=b4a4842f97a830e1b099460190b4b7b1

LangChain

Complete API reference for LangChain Python, including chat models, tools, agents, and more.
https://mintcdn.com/langchain-5e9cc07a-preview-docsop-1783847326-6a62893/BKFNguH5UONiM5tY/images/brand/langgraph-icon.png?fit=max&auto=format&n=BKFNguH5UONiM5tY&q=85&s=4c0d2e744ebc757f12d44a92af5a33c5

LangGraph

Complete API reference for LangGraph Python, including graph APIs, state management, checkpointing, and more.

LangChain Integrations

LangChain packages to connect with popular LLM providers, vector stores, tools, and other services.

MCP Adapter

Use Model Context Protocol (MCP) tools within LangChain and LangGraph applications.