---
title: "Get experiment score histogram with filters"
method: POST
path: "/api/v2/experiments/{experiment_id}/histogram/"
tags: ["experiments"]
---

# Get experiment score histogram with filters

`POST /api/v2/experiments/{experiment_id}/histogram/`

Compute histogram aggregation for experiment evaluation scores. The backend reads `evaluator_id` and `bins` from query parameters; it does not consume a request body.

## Path parameters

- `experiment_id` string, required

## Query parameters

- `evaluator_id` string, required
- `bins` integer

## Headers

- `Authorization` string, required

## Response `200`

Experiment score histogram.

- ExperimentsFilterExperimentScoreHistogramResponse200
  - `evaluator_id` string, required
  - `evaluator_slug` string, nullable
  - `evaluator_name` string, nullable
  - `bins` ApiV2ExperimentsExperimentIdHistogramPostResponsesContentApplicationJsonSchemaBinsItems[], required
    - `lower` number, double, required
    - `upper` number, double, required
    - `count` integer, required
    - `label` string, nullable — Human-readable label for boolean bins, such as `false` or `true`.
  - `stats` ApiV2ExperimentsExperimentIdHistogramPostResponsesContentApplicationJsonSchemaStats, required
    - `min` number, double, required
    - `max` number, double, required
    - `mean` number, double, required
    - `total` integer, required

## Other responses

- `400` — Bad Request
- `401` — Unauthorized - Missing or invalid authentication
- `404` — Evaluator or experiment not found

---

[API](https://skmtc.net/keywordsai/apis/api-reference.md) · [All operations](https://skmtc.net/keywordsai/apis/api-reference/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/keywordsai/api-reference/revisions/4e064cf81dae/schema)