Weights & Biases
The official Weights & Biases MCP server connects AI agents to your W&B Models and Weave data. Agents can query experiment runs, metrics, and sweeps, analyze and count Weave LLM traces, browse the model registry and artifacts, search the docs, and create W&B reports — grounding assistants in your experiment-tracking data.
Tools
compare_artifact_versions_tool
Diff two versions of a W&B artifact and show changes.
count_weave_traces_tool
Count Weave traces and retrieve storage size metrics.
create_wandb_report_tool
Create a W&B report with markdown, charts, and panels.
get_artifact_details_tool
Get the full details of a specific W&B artifact version.
get_run_history_tool
Retrieve sampled time-series metric data for a W&B run.
infer_trace_schema_tool
Discover field names, types, and sample values in Weave traces.
list_artifact_versions_tool
List every version of a given W&B artifact collection.
list_registries_tool
List the model registries within a W&B organization.
list_registry_collections_tool
List the artifact collections within a W&B registry.
list_wandb_automations_tool
List the configured W&B Automations for a project.
list_wandb_integrations_tool
List registered integrations used by W&B automations.
log_analysis_to_wandb
Log analysis results back to W&B as a new tracked run.
query_wandb_entity_projects
List all of the projects belonging to a W&B entity.
query_wandb_tool
Query W&B runs, metrics, and experiment tracking data.
query_weave_traces_tool
Analyze LLM traces from Weave with detail-level control.
search_wandb_docs_tool
Search the official Weights & Biases documentation.