---
title: "Get compatibility group"
method: GET
path: "/groups/{groupId}/artifacts/{artifactId}/contract/compatibility-group"
tags: ["Contracts"]
---

# Get compatibility group

`GET /groups/{groupId}/artifacts/{artifactId}/contract/compatibility-group`

## Request

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

Returns the compatibility group for the artifact's contract.

## Query parameters

- `contractId` string, required

## Response `200`

The compatibility group.

- object
  - `compatibilityGroup` string

## Other responses

- `404`: Common response for all operations that can return a `404` error.
- `500`: Common response for all operations that can fail with an unexpected server error.

## Changes

- **2026-10-31** `ff9684af2aad`: 10 info
  - added the optional property `ruleViolation/causes/items/code` to the response with the `404` status
  - added the optional property `ruleViolation/causes/items/code` to the response with the `500` status
  - added the optional property `ruleViolation/causes/items/direction` to the response with the `404` status
  - added the optional property `ruleViolation/causes/items/direction` to the response with the `500` status
  - …6 more
- **2026-10-29** `f17f5df4e79c`: 2 info
  - added the optional property `ruleViolation` to the response with the `404` status
  - added the optional property `ruleViolation` to the response with the `500` status
- **2026-05-19** `96ff089c4fd9`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/apicurio/apis/apicurio-registry-api-v3/changes/groups/:groupId/artifacts/:artifactId/contract/compatibility-group/get.md)

---

[API](https://skmtc.dev/apicurio/apis/apicurio-registry-api-v3.md) - [All operations](https://skmtc.dev/apicurio/apis/apicurio-registry-api-v3/llms.txt) - [OpenAPI document](https://skmtc.dev/apicurio/apis/apicurio-registry-api-v3/revisions/ff9684af2aad?raw)