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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-cbfron-1773179133-418c402/h7swo1F5SPYAYmNn/images/brand/langchain-icon.png?fit=max&auto=format&n=h7swo1F5SPYAYmNn&q=85&s=d97104f18157ab2dc9777016723d1d44

LangChain

Complete API reference for LangChain JavaScript/TypeScript, including chat models, tools, agents, and more.
https://mintcdn.com/langchain-5e9cc07a-preview-cbfron-1773179133-418c402/h7swo1F5SPYAYmNn/images/brand/langgraph-icon.png?fit=max&auto=format&n=h7swo1F5SPYAYmNn&q=85&s=ab46ce909598c5102e501e019ee5fef0

LangGraph

Complete API reference for LangGraph JavaScript/TypeScript, including graph APIs, state management, checkpointing, and more.
https://mintcdn.com/langchain-5e9cc07a-preview-cbfron-1773179133-418c402/h7swo1F5SPYAYmNn/images/brand/deep-agents-icon.png?fit=max&auto=format&n=h7swo1F5SPYAYmNn&q=85&s=f846c8c893d392ad629080c970f02227

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-cbfron-1773179133-418c402/h7swo1F5SPYAYmNn/images/brand/deep-agents-icon.png?fit=max&auto=format&n=h7swo1F5SPYAYmNn&q=85&s=f846c8c893d392ad629080c970f02227

Deep Agents

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