---
title: "Check schema compatibility"
slug: "datastream-postschemasversionslatest"
updated: 2026-09-17T09:47:59Z
published: 2026-09-17T09:47:59Z
canonical: "api.ncloud-docs.com/datastream-postschemasversionslatest"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://api.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Check schema compatibility

Available in VPC

Check whether the new schema is compatible with the existing schema.

              Note

              

Schema compatibility checks are used to ensure compatibility with existing data during schema evolution.

## Request

This section describes the request format. The method and URI are as follows:

| Method | URI |
| --- | --- |
| POST | /api/v1/topics/{topicId}/schemas/validate/compatibility/latest |

### Request headers

For information about the headers common to all Data Stream APIs, see [Data Stream request headers](/docs/en/datastream-overview#%EC%9A%94%EC%B2%AD%ED%97%A4%EB%8D%94).

### Request path parameters

You can use the following path parameters with your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `topicId` | String | Required | Topic ID - See [Get topic list](/docs/en/datastream-gettopic). |

### Request body

You can include the following data in the body of your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `schemaType` | String | Required | Schema type - `AVRO` \| `JSON` \| `PROTOBUF` - `AVRO`: Apache Avro schema - `JSON`: JSON schema - `PROTOBUF`: Protocol Buffers schema |
| `schema` | String | Required | Schema definition - Write in the format appropriate for the selected schema type. - Pass in JSON string format. |

### Request example

The request example is as follows:

```
curl --location --request POST 'https://datastream.apigw.ntruss.com/api/v1/topics/mgNWA*****/schemas/validate/compatibility/latest' \
--header 'x-ncp-apigw-timestamp: {Timestamp}' \
--header 'x-ncp-iam-access-key: {Access Key}' \
--header 'x-ncp-apigw-signature-v2: {API Gateway Signature}' \
--data '{
  "schemaType": "AVRO",
  "schema": "{\"type\":\"record\",\"name\":\"User\",\"fields\":[{\"name\":\"id\",\"type\":\"int\"},{\"name\":\"name\",\"type\":\"string\"},{\"name\":\"email\",\"type\":\"string\"},{\"name\":\"phone\",\"type\":[\"null\",\"string\"],\"default\":null}]}"
}'
```

## Response

This section describes the response format.

### Response body

The response body includes the following data:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `is_compatible` | Boolean | - | Compatibility - `true`: Compatible - `false`: Not compatible |

### Response status codes

For information about the HTTP status codes common to all Data Stream APIs, see [Data Stream response status codes](/docs/en/datastream-overview#%EC%9D%91%EB%8B%B5%EC%83%81%ED%83%9C%EC%BD%94%EB%93%9C).

### Response example

The response example is as follows:

#### If compatible

```
{
  "is_compatible": true
}
```

#### If not compatible

```
{
  "is_compatible": false
}
```