---
title: "Get the compatibility level for a subject."
method: GET
path: "/config/{subject}"
tags: ["Config"]
---

# Get the compatibility level for a subject.

`GET /config/{subject}`

## Request

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

Get the compatibility level for a subject.

## Path parameters

- `subject` string, required

## Query parameters

- `defaultToGlobal` boolean

## Headers

- `X-Registry-GroupId` string

## Response `200`

The current compatibility configuration for the subject.

- SubjectConfigResponse
  - `alias` string: Alias subject name used for resolution.
  - `normalize` boolean: Whether schemas are normalized during registration and lookups.
  - `compatibilityLevel` 'BACKWARD' | 'BACKWARD_TRANSITIVE' | 'FORWARD' | 'FORWARD_TRANSITIVE' | 'FULL' | 'FULL_TRANSITIVE' | 'NONE': The compatibility level for the subject.
  - `compatibilityGroup` string: Only schemas in the same group will be compared for compatibility.
  - `defaultMetadata` object: Default metadata applied during schema registration.
  - `overrideMetadata` object: Override metadata applied during schema registration.
  - `defaultRuleSet` object: Default ruleSet applied during schema registration.
  - `overrideRuleSet` object: Override ruleSet applied during schema registration.

## Other responses

- `404`: Error returned by the Schema Registry API
- `500`: Error returned by the Schema Registry API

---

[API](https://skmtc.dev/apicurio/apis/apicurio-registry-confluent-compatibility-api.md) - [All operations](https://skmtc.dev/apicurio/apis/apicurio-registry-confluent-compatibility-api/llms.txt) - [OpenAPI document](https://skmtc.dev/apicurio/apis/apicurio-registry-confluent-compatibility-api/revisions/a2f9ca447c9b?raw)