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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-fjmorr-1776290736-a49afb5/8Y6M_uGWFXmQun4s/images/brand/deep-agents-icon.png?fit=max&auto=format&n=8Y6M_uGWFXmQun4s&q=85&s=d84cc50a9afb449b515238226a059c64

Deep Agents

Build agents that can plan, use subagents, and leverage file systems for complex tasks.
https://mintcdn.com/langchain-5e9cc07a-preview-fjmorr-1776290736-a49afb5/8Y6M_uGWFXmQun4s/images/brand/langchain-icon.png?fit=max&auto=format&n=8Y6M_uGWFXmQun4s&q=85&s=3d9b93263019f0d04ef680326f6992f1

LangChain

Complete API reference for LangChain Python, including chat models, tools, agents, and more.
https://mintcdn.com/langchain-5e9cc07a-preview-fjmorr-1776290736-a49afb5/8Y6M_uGWFXmQun4s/images/brand/langgraph-icon.png?fit=max&auto=format&n=8Y6M_uGWFXmQun4s&q=85&s=20d024070f3649e90ca762d2657b7ae9

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.