---
title: "Get Eval Rollout Statistics Route"
method: GET
path: "/api/v1/eval/{run_id}/rollout-statistics"
tags: ["eval"]
---

# Get Eval Rollout Statistics Route

`GET /api/v1/eval/{run_id}/rollout-statistics`

## Request

- Base URL: `https://api.trajectory.ai` (the document declares no server; this is the origin it was published from)
- URL: `https://api.trajectory.ai/api/v1/eval/{run_id}/rollout-statistics`
- Auth: none declared

## Path parameters

- `run_id` string, required

## Response `200`

Successful Response

- EvalRolloutStatisticsResponse
  - `eval_run_id` string, required: Evaluation run whose rollouts were sampled.
  - `snapshots` EvalRolloutStatisticResponse[], required: Runtime-computed distributions for the evaluation.
    - `eval_run_id` string, required: Evaluation run that produced this snapshot.
    - `xid` string: Evaluation rollout XID sampled by this snapshot.
    - `stage` string, required: Pipeline stage that produced the trajectories.
    - `knob_name` string, required: Trajectory setting represented by the distribution.
    - `unit` string, required: Unit used by the setting and sample values.
    - `samples` number[]: Observed values.
    - `sample_count` integer, required: Number of trajectories sampled.
    - `created_at` string, date-time, required: Time when the underlying evaluation completed.

---

[API](https://skmtc.dev/trajectory/apis/trajectory-api.md) - [All operations](https://skmtc.dev/trajectory/apis/trajectory-api/llms.txt) - [OpenAPI document](https://skmtc.dev/trajectory/apis/trajectory-api/revisions/8bc8093c59f6?raw)