LangSmith

Traces, evaluations, and prompt versions.

Connect LangSmith All toolkits

Auth: API keyCatalog preview

Tools

What your agent can do with LangSmith

LANGSMITH_SEARCH

Search across LangSmith records and content.

LANGSMITH_CREATE

Create a new item in LangSmith with validated fields.

LANGSMITH_UPDATE

Update an existing LangSmith item by id.

LANGSMITH_LIST

List and filter LangSmith items with pagination.

Setup

Option A: MCP (no code)

Sign up and connect LangSmith from your dashboard.
Copy your gateway URL: mcp.spinrun.ai/you
Paste it into Claude, Cursor, or any MCP client.

Option B: API

curl -X POST https://api.spinrun.ai/v1/tools/execute \
  -H "Authorization: Bearer $API_KEY" \
  -d '{
    "tool_slug": "LANGSMITH_CREATE",
    "external_user_id": "user_123",
    "arguments": { ... }
  }'

Put LangSmith to work

Get started for free

See use cases →