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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-bigque-1776261387-d12c650/rkdlo68MnfDACVef/images/brand/deep-agents-icon.png?fit=max&auto=format&n=rkdlo68MnfDACVef&q=85&s=8e2ffb7315137e24f0ed2fbde96b1bf9

Deep Agents

Build agents that can plan, use subagents, and leverage file systems for complex tasks.
https://mintcdn.com/langchain-5e9cc07a-preview-bigque-1776261387-d12c650/rkdlo68MnfDACVef/images/brand/langchain-icon.png?fit=max&auto=format&n=rkdlo68MnfDACVef&q=85&s=0b6fd3dda1f06a80e45cbfb1e97102fb

LangChain

Complete API reference for LangChain Python, including chat models, tools, agents, and more.
https://mintcdn.com/langchain-5e9cc07a-preview-bigque-1776261387-d12c650/rkdlo68MnfDACVef/images/brand/langgraph-icon.png?fit=max&auto=format&n=rkdlo68MnfDACVef&q=85&s=9f18a9de093bc300a848c6129acd16d7

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.