---
title: "Get Collection Instrument Schema By Guid"
method: GET
path: "/collection-instruments/schema"
---

# Get Collection Instrument Schema By Guid

`GET /collection-instruments/schema`

## Request

- The document declares no server URL.
- Auth: none declared

GET method that fetches a CI schema by GUID.

## Query parameters

- `guid` string: The global unique ID of the CI

## Response `200`

Successful Response

- unknown

## Other responses

- `400`: Bad Request
- `404`: Not Found
- `422`: Validation Error
- `500`: Internal Server Error

## Changes

- **2026-08-27** `1e0c2422ae94`: 11 breaking, 1 warning, 2 info
  - the response's body type changed from `object` to no type for status `200`
  - removed the required property `ci_version` from the response with the `200` status
  - removed the required property `classifier_type` from the response with the `200` status
  - removed the required property `classifier_value` from the response with the `200` status
  - …10 more
- **2026-04-30** `fcb7af2e1be9`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/office-of-national-statistics/apis/collection-instrumentation-register/changes/collection-instruments/schema/get.md)

---

[API](https://skmtc.dev/office-of-national-statistics/apis/collection-instrumentation-register.md) - [All operations](https://skmtc.dev/office-of-national-statistics/apis/collection-instrumentation-register/llms.txt) - [OpenAPI document](https://skmtc.dev/office-of-national-statistics/apis/collection-instrumentation-register/revisions/7aeabd13e191?raw)