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Langfuse

Log LLM traces, spans, generations, and scores to Langfuse, or query traces, prompts, datasets, sessions, and more via the Public API.

Actions28

Public API → List Observations

AI-generated

Summary

List observations from the Langfuse Public API, supporting pagination and optional query parameters to refine the results.

Inputs

  • Show Advanced Fields — Toggle to reveal optional fields specific to this operation.
  • Query JSON — A JSON object to be converted into query string parameters for filtering, pagination, or other query options (e.g., {"page":1,"limit":20}). Only visible and used when Show Advanced Fields is enabled.
  • Return All — When true, auto-paginates and returns all observations; when false, returns only a limited page based on query or default limits.

Output shape

a paginated list of observation records, each representing a single observation as returned by Langfuse, with associated metadata when available

If "Return All" is enabled, the operation automatically paginates through all pages of results and returns a concatenated list. The query JSON can be used to customize pagination, filtering, or sorting parameters but requires advanced fields to be shown. Partial or empty query parameters are allowed, defaulting to Langfuse API defaults. Errors preserve HTTP status and body for downstream handling.

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