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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-1776893517-ecb9256/bSL66XY3CosPMoE2/images/brand/langchain-icon.png?fit=max&auto=format&n=bSL66XY3CosPMoE2&q=85&s=1a7b28be7df56c721da5ea9cdb3b5748

LangChain

Complete API reference for LangChain JavaScript/TypeScript, including chat models, tools, agents, and more.
https://mintcdn.com/langchain-5e9cc07a-preview-fjmorr-1776893517-ecb9256/bSL66XY3CosPMoE2/images/brand/langgraph-icon.png?fit=max&auto=format&n=bSL66XY3CosPMoE2&q=85&s=c0764bd2ace42e32f943e6b0e2c5f631

LangGraph

Complete API reference for LangGraph JavaScript/TypeScript, including graph APIs, state management, checkpointing, and more.
https://mintcdn.com/langchain-5e9cc07a-preview-fjmorr-1776893517-ecb9256/bSL66XY3CosPMoE2/images/brand/deep-agents-icon.png?fit=max&auto=format&n=bSL66XY3CosPMoE2&q=85&s=034172fb382e6d85120ded99d74dbaae

Deep Agents

Build agents that can plan, use subagents, and leverage file systems for complex tasks

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.
https://mintcdn.com/langchain-5e9cc07a-preview-fjmorr-1776893517-ecb9256/bSL66XY3CosPMoE2/images/brand/deep-agents-icon.png?fit=max&auto=format&n=bSL66XY3CosPMoE2&q=85&s=034172fb382e6d85120ded99d74dbaae

Deep Agents

Build agents that can plan, use subagents, and leverage file systems for complex tasks.