Langfuse

Attach an evaluation score to exactly one Langfuse trace, session, or dataset run, optionally narrowing a trace score to an observation.

Retrieve one Langfuse annotation queue by its ID.

Retrieve a Langfuse text or chat prompt by name, deployment label, or exact version, with optional dependency resolution.

List annotation queues configured for human evaluation in the connected Langfuse project.

List dataset items, optionally scoped to a dataset, source trace or observation, or historical dataset version.

List run items for a specific Langfuse dataset and run name.

List datasets available to the connected Langfuse project.

List Langfuse experiments active in a required time range, optionally including metadata and directly attached scores.

List Langfuse-managed and project-custom model pricing definitions used for usage and cost calculation.

Search Langfuse observations such as generations, spans, events, agents, and tool calls, selecting only the field groups needed.

Search numeric, boolean, categorical, text, and correction scores with subject and annotation context.

Run an aggregate Langfuse metrics query over observations or numeric, boolean, or categorical scores.

Create or update a Langfuse LLM provider connection by provider name.