---
title: "POST /compatibility/subjects/{subject}/versions/{version}"
method: POST
path: "/compatibility/subjects/{subject}/versions/{version}"
tags: ["Compatibility"]
---

# POST /compatibility/subjects/{subject}/versions/{version}

`POST /compatibility/subjects/{subject}/versions/{version}`

## Path parameters

- `subject` string, required
- `version` string, required

## Query parameters

- `verbose` boolean
- `normalize` boolean

## Headers

- `X-Registry-GroupId` string

## Request body

- RegisterSchemaRequest
  - `schema` string, required — The schema definition as a string.
  - `schemaType` string — The schema format (AVRO, PROTOBUF, JSON). Default is AVRO.
  - `references` SchemaReference[] — A list of referenced schemas.
    - `name` string, required
    - `subject` string, required
    - `version` integer, required
  - `metadata` object — Optional metadata associated with the schema.
  - `ruleSet` object — Optional ruleset configuration for the schema.

## Response `200`

Compatibility check result.

- CompatibilityCheckResponse
  - `is_compatible` boolean, required — True if the schema is compatible, false otherwise.

## Other responses

- `404` — Error returned by the Schema Registry API
- `422` — Error returned by the Schema Registry API
- `500` — Error returned by the Schema Registry API

---

[API](https://skmtc.net/apicurio/apis/apicurio-registry-confluent-compatibility-api.md) · [All operations](https://skmtc.net/apicurio/apis/apicurio-registry-confluent-compatibility-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/apicurio/apicurio-registry-confluent-compatibility-api/revisions/933e587f2d85/schema)