---
title: "GET /system_class_count/"
method: GET
path: "/system_class_count/"
tags: ["Administrative Endpoints"]
---

# GET /system_class_count/

`GET /system_class_count/`

Retrieves system classes with a count of their instances.

## Query parameters

- `type_id` integer[]

## Response `200`

Success

- SystemClassCountModel
  - `move` integer, required
  - `bibliography` integer, required
  - `person` integer, required
  - `acquisition` integer, required
  - `reference_system` integer, required
  - `feature` integer, required
  - `file` integer, required
  - `activity` integer, required
  - `type` integer, required
  - `administrative_unit` integer, required
  - `artifact` integer, required
  - `text` integer, required
  - `place` integer, required
  - `stratigraphic_unit` integer, required
  - `edition` integer, required
  - `group` integer, required
  - `source` integer, required

## Other responses

- `400` — Bad Request
- `401` — Unauthorized
- `403` — Access denied
- `404` — Resource not found
- `409` — Conflict
- `500` — Internal server error

## Changes

- **2026-05-15** `905cb69b257a` — 1 breaking, 1 info
  - removed the required property `source_translation` from the response with the `200` status
  - added the required property `text` to the response with the `200` status
- **2025-12-03** `008688998b83` — 6 breaking
  - the `allOf[#/components/schemas/ApiError]/url` response's property type/format changed from `string`/`uri` to `string`/`` for status `401`
  - the `allOf[#/components/schemas/ApiError]/url` response's property type/format changed from `string`/`uri` to `string`/`` for status `403`
  - the `allOf[#/components/schemas/ApiError]/url` response's property type/format changed from `string`/`uri` to `string`/`` for status `404`
  - the `allOf[#/components/schemas/ApiError]/url` response's property type/format changed from `string`/`uri` to `string`/`` for status `409`
  - …2 more
- **2025-12-02** `26f86ddcd57c` — 9 info
  - added `#/components/schemas/ApiError, subschema #2` to the response body `allOf` list for the response status `404`
  - added `#/components/schemas/ApiError, #/components/schemas/ParameterError, subschema #3` to the response body `anyOf` list for the response status `400`
  - removed `#/components/schemas/ErrorModel, #/components/schemas/ParameterErrorModel` from the response body `oneOf` list for the response status `400`
  - removed `#/components/schemas/ErrorModel, #/components/schemas/ParameterErrorModel` from the response body `oneOf` list for the response status `404`
  - …5 more
- …earlier changes not shown

[Full history](https://skmtc.dev/craws/apis/openatlas-api/changes/system_class_count/get.md)

---

[API](https://skmtc.dev/craws/apis/openatlas-api.md) · [All operations](https://skmtc.dev/craws/apis/openatlas-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/craws/openatlas-api/revisions/bbd340468fc9/schema)