---
title: "Fetch Simple Evaluator"
method: GET
path: "/preview/simple/evaluators/{evaluator_id}"
tags: ["Evaluators"]
---

# Fetch Simple Evaluator

`GET /preview/simple/evaluators/{evaluator_id}`

## Path parameters

- `evaluator_id` string, uuid, required

## Response `200`

Successful Response

- SimpleEvaluatorResponse
  - `count` integer
  - `evaluator` SimpleEvaluator
    - `flags` SimpleEvaluatorFlags
      - `is_custom` boolean
      - `is_evaluator` boolean
      - `is_human` boolean
      - `is_chat` boolean
    - `tags` object, nullable
    - `meta` object, nullable
    - `name` string, nullable
    - `description` string, nullable
    - `created_at` string, date-time, nullable
    - `updated_at` string, date-time, nullable
    - `deleted_at` string, date-time, nullable
    - `created_by_id` string, uuid, nullable
    - `updated_by_id` string, uuid, nullable
    - `deleted_by_id` string, uuid, nullable
    - `slug` string, nullable
    - `id` string, uuid, nullable
    - `data` SimpleEvaluatorDataOutput
      - `script` object, nullable
      - `parameters` object, nullable
      - `version` string, nullable
      - `uri` string, nullable
      - `url` string, nullable
      - `headers` object, nullable
      - `schemas` JsonSchemasOutput
        - `parameters` object, nullable
        - `inputs` object, nullable
        - `outputs` object, nullable
      - `service` object, nullable
      - `configuration` object, nullable
    - `variant_id` string, uuid, nullable
    - `revision_id` string, uuid, nullable

## Other responses

- `422` — Validation Error

## Changes

- **2026-02-13** `72fe88316d15` — 1 warning, 8 info
  - removed the optional property `evaluator/anyOf[subschema #1: SimpleEvaluator]/data/anyOf[subschema #1: SimpleEvaluatorData]/runtime` from the response with the `200` status
  - added the optional property `detail/items/ctx` to the response with the `422` status
  - added the optional property `detail/items/input` to the response with the `422` status
  - added the optional property `evaluator/anyOf[subschema #1: SimpleEvaluator]/flags/anyOf[subschema #1: SimpleEvaluatorFlags]/is_chat` to the response with the `200` status
  - …5 more
- **2026-01-14** `53da4c9de2b7` — 2 breaking, 1 warning, 10 info
  - response property `evaluator/anyOf[subschema #1: SimpleEvaluator]/data/anyOf[subschema #1: SimpleEvaluatorData]/script` list-of-types was widened by adding types `object` to media type `application/json` of response `200`
  - the `evaluator/anyOf[subschema #1: SimpleEvaluator]/data/anyOf[subschema #1: SimpleEvaluatorData]/script/anyOf[subschema #1]/` response's property type changed from `string` to `object` for status `200`
  - removed the optional property `evaluator/anyOf[subschema #1: SimpleEvaluator]/data/anyOf[subschema #1: SimpleEvaluatorData]/mappings` from the response with the `200` status
  - added the optional property `evaluator/anyOf[subschema #1: SimpleEvaluator]/data/anyOf[subschema #1: SimpleEvaluatorData]/runtime` to the response with the `200` status
  - …9 more
- …earlier changes not shown

[Full history](https://skmtc.dev/agenta-ai/apis/agenta-api/changes/preview/simple/evaluators/:evaluator_id/get.md)

---

[API](https://skmtc.dev/agenta-ai/apis/agenta-api.md) · [All operations](https://skmtc.dev/agenta-ai/apis/agenta-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/agenta-ai/agenta-api/revisions/42bb75a1c2e6/schema)