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MCP server

W&B MCP Server

Queries Weights & Biases runs and Weave traces in plain language.

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Add it to your client

Official
Install
uvx wandb-mcp-server
mcpServers
{
  "mcpServers": {
    "wandb-mcp": {
      "command": "uvx",
      "args": [
        "wandb-mcp-server"
      ]
    }
  }
}
Transport
both
Runtime
Python
Auth
Required
License
MIT
Tools
query_wandb_toolquery_weave_traces_toolcount_weave_traces_toolinfer_trace_schema_toolget_run_history_toolcreate_wandb_report_toollog_analysis_to_wandb

Connects an MCP client to W&B Models and Weave so an agent can pull run metrics, sample a metric's history, inspect and count LLM traces, and infer what fields those traces carry. A report tool writes the analysis back into the workspace as a shareable W&B report. Available as a hosted HTTP endpoint or as a local stdio process launched with uvx; a W&B API key is needed either way.

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