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LangChain MCP

by LangChain · AI & ML

Access LangSmith traces, evaluations, and datasets. Debug LangChain applications.

Works with:Claude CodeCursorWindsurfOpenCode

tracesevaluationsdatasetsdebugread

Install

Run this command in your terminal:

claude mcp add --transport stdio mcp-langchain -- npx -y langsmith-mcp

Before running, set: LANGSMITH_API_KEY

API key

Required environment variables:

See the setup guide for step-by-step instructions on obtaining these credentials.

Official LangSmith/LangChain MCP.

langchain-skills

LangChain skills build and inspect chains via the LangChain MCP.

langchain-community-plugin

Community plugin is the interface layer for the LangChain MCP.