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langchain_blog · Sep 4, 2026 · news

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MCP in LangChain: Stateless Protocol, Elicitation, and More!

the LangChain blogSep 4, 2026
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In brief

MCP support now lives in langchain.mcp, built on FastMCP for the 2026-07-28 spec, with elicitation handled as a LangGraph interrupt and tool lists cached.

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MCP in LangChain: Stateless Protocol, Elicitation, and More!

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