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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-docsop-1783712953-3d6265d/2htzBTbSp0Nt_IZ2/images/brand/deep-agents-icon.png?fit=max&auto=format&n=2htzBTbSp0Nt_IZ2&q=85&s=5219389ca089b452d18276824fc41495

Deep Agents

Build agents that can plan, use subagents, and leverage file systems for complex tasks.
https://mintcdn.com/langchain-5e9cc07a-preview-docsop-1783712953-3d6265d/2htzBTbSp0Nt_IZ2/images/brand/langchain-icon.png?fit=max&auto=format&n=2htzBTbSp0Nt_IZ2&q=85&s=639f346f0d74c95fc686d3eff9f9d7ba

LangChain

Complete API reference for LangChain Python, including chat models, tools, agents, and more.
https://mintcdn.com/langchain-5e9cc07a-preview-docsop-1783712953-3d6265d/2htzBTbSp0Nt_IZ2/images/brand/langgraph-icon.png?fit=max&auto=format&n=2htzBTbSp0Nt_IZ2&q=85&s=d1e8636eb2311b19cda5e022b2fa1689

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.