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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-cost-1776190025-cb56175/NRH94c8cnoyp5kP_/images/brand/langchain-icon.png?fit=max&auto=format&n=NRH94c8cnoyp5kP_&q=85&s=5f60d3ef2f0e1872870f134ad221d70c

LangChain

Complete API reference for LangChain JavaScript/TypeScript, including chat models, tools, agents, and more.
https://mintcdn.com/langchain-5e9cc07a-preview-cost-1776190025-cb56175/NRH94c8cnoyp5kP_/images/brand/langgraph-icon.png?fit=max&auto=format&n=NRH94c8cnoyp5kP_&q=85&s=0857db8276750ebf1c774a8a7a12cc3d

LangGraph

Complete API reference for LangGraph JavaScript/TypeScript, including graph APIs, state management, checkpointing, and more.
https://mintcdn.com/langchain-5e9cc07a-preview-cost-1776190025-cb56175/NRH94c8cnoyp5kP_/images/brand/deep-agents-icon.png?fit=max&auto=format&n=NRH94c8cnoyp5kP_&q=85&s=8fa970a3cbfe08ab5063d91e164701c4

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-cost-1776190025-cb56175/NRH94c8cnoyp5kP_/images/brand/deep-agents-icon.png?fit=max&auto=format&n=NRH94c8cnoyp5kP_&q=85&s=8fa970a3cbfe08ab5063d91e164701c4

Deep Agents

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