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Integration

LangSmith

Trace, evaluate and monitor LLM applications. Your client pastes their LangSmith key once, and your agent or your code works with their access.

AI

About LangSmith

LangSmith, from LangChain, traces, evaluates and monitors LLM applications.

With your client's LangSmith connected, your agent can work with their runs and datasets.

LangSmith

LangSmith · AI

API key

Trace, evaluate and monitor LLM applications

The client pastes their API key from LangSmith's settings. We store it encrypted.

Tested against LangSmith's live API.

Tools

Every tool your agent gets for LangSmith. Select one to see its inputs and an example call.

  • Loading every tool…

Building with LangSmith? The docs have setup steps and code for every tool.

Open the LangSmith docs

Any other endpoint

The request tool calls any LangSmith endpoint the tools above don't cover, with the client's access attached.

Base URL for request

https://api.smith.langchain.com/api/v1

  • request

    HTTPS ANY /v1/clients/{clientId}/langsmith/{path}

    Any endpoint of LangSmith's own API, with the client's access attached.

    servicestringrequired
    This service: langsmith
    methodstringrequired
    GET, POST, PUT, PATCH or DELETE
    pathstringrequired
    The path under https://api.smith.langchain.com/api/v1
    queryobjectoptional
    Query parameters
    bodyobjectoptional
    A JSON body

Over MCP every tool also takes client_id, from list_clients. Over HTTPS send it as clientId to https://api.operate.as/v1.

What the client approves

  • Use the LangSmith key you paste, with only the access you gave that key

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