Reference sites
LangChain
Complete API reference for LangChain JavaScript/TypeScript, including chat models, tools, agents, and more.
LangGraph
Complete API reference for LangGraph JavaScript/TypeScript, including graph APIs, state management, checkpointing, and more.
![[light logo]](https://mintcdn.com/langchain-5e9cc07a/nQm-sjd_MByLhgeW/images/brand/langchain-docs-dark-blue.png?fit=max&auto=format&n=nQm-sjd_MByLhgeW&q=85&s=5babf1a1962208fd7eed942fa2432ecb){kind=link}
![[dark logo]](https://mintcdn.com/langchain-5e9cc07a/nQm-sjd_MByLhgeW/images/brand/langchain-docs-light-blue.png?fit=max&auto=format&n=nQm-sjd_MByLhgeW&q=85&s=0bcd2a1f2599ed228bcedf0f535b45b1){kind=link}
![[]](https://mintcdn.com/langchain-5e9cc07a/nQm-sjd_MByLhgeW/images/brand/langchain-icon.png?fit=max&auto=format&n=nQm-sjd_MByLhgeW&q=85&s=663b30f85baf99ad708b97e05da2a5a4){kind=link}
![[]](https://mintcdn.com/langchain-5e9cc07a/nQm-sjd_MByLhgeW/images/brand/langgraph-icon.png?fit=max&auto=format&n=nQm-sjd_MByLhgeW&q=85&s=b997e1a7487d507a36556eedbfd99f81){kind=link}
![[]](https://mintcdn.com/langchain-5e9cc07a/nQm-sjd_MByLhgeW/images/brand/deep-agents-icon.png?fit=max&auto=format&n=nQm-sjd_MByLhgeW&q=85&s=1cc68f66a9e7550331cc0875f1ba53af){kind=link}
Deep Agents
Build agents that can plan, use subagents, and leverage file systems for complex tasks
MCP Adapter
Use Model Context Protocol (MCP) tools within LangChain and LangGraph applications.
Deep Agents
Build agents that can plan, use subagents, and leverage file systems for complex tasks.
Connect these docs to Claude, VSCode, and more via MCP for real-time answers.