v1

latestOpenAPI 3.0.02026-07-141,4077,1665.2 MB

LLM Observability

List LLM Observability experiment spans (v1)

Retrieve spans with their evaluation metrics for a given experiment. Returns spans only, with no summary metrics and no pagination. Deprecated in favor of ListLLMObsExperimentEventsV3.

get/api/v2/llm-obs/v1/experiments/{experiment_id}/events

Path parameters

experiment_idstring required

The ID of the LLM Observability experiment.

Response

Example response

{
  "data": [
    {
      "attributes": {
        "duration": 1500000000,
        "eval_metrics": [
          {
            "assessment": "pass",
            "eval_source_type": "managed",
            "id": "00000000-0000-0000-0000-000000000001",
            "label": "faithfulness",
            "metric_source": "custom",
            "metric_type": "score",
            "span_id": "span-7a1b2c3d",
            "timestamp_ms": 1705314600000,
            "trace_id": "abc123def456"
          }
        ],
        "id": "00000000-0000-0000-0000-000000000001",
        "meta": {
          "error": {
            "message": "Model response timed out",
            "stack": "Traceback (most recent call last):\n  File \"main.py\", line 10, in <module>\n    response = model.generate(input)\n  File \"model.py\", line 45, in generate\n    raise TimeoutError(\"Model response timed out\")\nTimeoutError: Model response timed out",
            "type": "TimeoutError"
          }
        },
        "name": "llm_call",
        "span_id": "span-7a1b2c3d",
        "start_ns": 1705314600000000000,
        "status": "ok",
        "trace_id": "abc123def456"
      },
      "id": "00000000-0000-0000-0000-000000000001",
      "type": "experiments"
    }
  ]
}