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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-opensw-1783449218-7296d22/4qwDmkxgckRSiVen/images/brand/deep-agents-icon.png?fit=max&auto=format&n=4qwDmkxgckRSiVen&q=85&s=fc127884aec59116497fdad151ac8c17

Deep Agents

Build agents that can plan, use subagents, and leverage file systems for complex tasks.
https://mintcdn.com/langchain-5e9cc07a-preview-opensw-1783449218-7296d22/4qwDmkxgckRSiVen/images/brand/langchain-icon.png?fit=max&auto=format&n=4qwDmkxgckRSiVen&q=85&s=b31ac387307ac110ecd91a809169ab88

LangChain

Complete API reference for LangChain Python, including chat models, tools, agents, and more.
https://mintcdn.com/langchain-5e9cc07a-preview-opensw-1783449218-7296d22/4qwDmkxgckRSiVen/images/brand/langgraph-icon.png?fit=max&auto=format&n=4qwDmkxgckRSiVen&q=85&s=70e245d9047f7403e3fdde855e09b613

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.