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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-immanu-1776816584-197cf7a/DEHdQftRYoiYaqg0/images/brand/deep-agents-icon.png?fit=max&auto=format&n=DEHdQftRYoiYaqg0&q=85&s=686f7c1acfeeeac5355024df288128c3

Deep Agents

Build agents that can plan, use subagents, and leverage file systems for complex tasks.
https://mintcdn.com/langchain-5e9cc07a-preview-immanu-1776816584-197cf7a/DEHdQftRYoiYaqg0/images/brand/langchain-icon.png?fit=max&auto=format&n=DEHdQftRYoiYaqg0&q=85&s=4267f569c33cb34fd654bbb99e4df2f5

LangChain

Complete API reference for LangChain Python, including chat models, tools, agents, and more.
https://mintcdn.com/langchain-5e9cc07a-preview-immanu-1776816584-197cf7a/DEHdQftRYoiYaqg0/images/brand/langgraph-icon.png?fit=max&auto=format&n=DEHdQftRYoiYaqg0&q=85&s=413f17ff5d436515ce89d9146827e216

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.