MCP server

LangSmith MCP Server

Opens LangSmith traces, prompts, datasets and experiments to an agent.

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Official

Install

uvx langsmith-mcp-server

mcpServers

{
  "mcpServers": {
    "langsmith-mcp": {
      "command": "uvx",
      "args": [
        "langsmith-mcp-server"
      ]
    }
  }
}

Transport: both
Runtime: Python
Auth: Required
License: MIT

Tools

fetch_runslist_projectsget_thread_historylist_promptsget_prompt_by_namepush_promptlist_datasetsread_datasetcreate_datasetlist_examplesread_exampleupdate_examples+3

Repositoryhttps://github.com/langchain-ai/langsmith-mcp-server

Gives an MCP client read and write access to a LangSmith workspace: run history, conversation threads, prompt versions, dataset examples, experiment results and billing usage. It runs locally with uvx over stdio, or over HTTP for self-hosted deployments. LangChain now points new setups at the hosted remote MCP endpoint and keeps this package for self-hosted installs older than v0.15.

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