---
title: "Http Get Ci Schema V2"
method: GET
path: "/v2/retrieve_collection_instrument"
tags: ["legacy"]
deprecated: true
---

# Http Get Ci Schema V2

`GET /v2/retrieve_collection_instrument`

## Request

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

> **Deprecated.**

GET method that fetches a CI schema by GUID.
This endpoint is deprecated.

## 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

- **2026-08-28** `e82a1a49216c`: 11 breaking, 1 warning
  - 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
  - …8 more
- **2026-08-27** `1e0c2422ae94`: 2 info
  - 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
- **2026-04-29** `1b29b4c8de31`: 2 info
  - api tag `legacy` added
  - endpoint deprecated
- **2025-07-11** `8e0764f79249`: 1 info
  - added the required property `validator_version` to the response with the `200` status
- **2024-11-28** `d4663c684113`: 1 breaking
  - removed the required property `description` from the response with the `200` status

[Operation history](https://skmtc.dev/office-of-national-statistics/apis/collection-instrumentation-register/changes/v2/retrieve_collection_instrument/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)