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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-1776815725-f709483/VZJuR2-xQwhmYoQr/images/brand/langchain-icon.png?fit=max&auto=format&n=VZJuR2-xQwhmYoQr&q=85&s=5c22cb4eb19eb36f64f9c31728499278

LangChain

Complete API reference for LangChain JavaScript/TypeScript, including chat models, tools, agents, and more.
https://mintcdn.com/langchain-5e9cc07a-preview-immanu-1776815725-f709483/VZJuR2-xQwhmYoQr/images/brand/langgraph-icon.png?fit=max&auto=format&n=VZJuR2-xQwhmYoQr&q=85&s=b515e47cf819c86bb89bdf7bf52903ce

LangGraph

Complete API reference for LangGraph JavaScript/TypeScript, including graph APIs, state management, checkpointing, and more.
https://mintcdn.com/langchain-5e9cc07a-preview-immanu-1776815725-f709483/VZJuR2-xQwhmYoQr/images/brand/deep-agents-icon.png?fit=max&auto=format&n=VZJuR2-xQwhmYoQr&q=85&s=c3aa1f93df5d8242f069961702ece127

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-immanu-1776815725-f709483/VZJuR2-xQwhmYoQr/images/brand/deep-agents-icon.png?fit=max&auto=format&n=VZJuR2-xQwhmYoQr&q=85&s=c3aa1f93df5d8242f069961702ece127

Deep Agents

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