# Returns All Schemas Related to the Topic

**`GET /api/v1/schemas/{topicId}`**

Returns a paginated list of all schemas associated with the specified Hedera topic ID.

**Authentication:** Bearer token required (`Authorization: Bearer <token>`)

**Permission:** `Permissions.SCHEMAS_SCHEMA_READ`

***

## Request

### Path Parameters

| Parameter | Type   | Required | Description                                                   |
| --------- | ------ | -------- | ------------------------------------------------------------- |
| `topicId` | string | Yes      | The Hedera topic ID to filter schemas by (e.g. `0.0.1234567`) |

### Query Parameters

| Parameter   | Type   | Required | Default | Description                                     |
| ----------- | ------ | -------- | ------- | ----------------------------------------------- |
| `pageIndex` | number | No       | 0       | Zero-based page index (number of pages to skip) |
| `pageSize`  | number | No       | 20      | Number of items to return per page              |
| `category`  | string | No       | —       | Schema category filter (e.g. `POLICY`)          |

***

## Response

### Success Response

**Status:** `200 OK`

The response includes an `X-Total-Count` header with the total number of matching schemas.

```json
[
  {
    "id": "63e3e5e8a01b3c001234abcd",
    "uuid": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
    "name": "Carbon Offset Schema",
    "description": "Schema for carbon offset reporting",
    "entity": "VC",
    "status": "PUBLISHED",
    "version": "1.0.0",
    "topicId": "0.0.1234567",
    "owner": "example_user"
  }
]
```

### Error Responses

| Status                      | Description               |
| --------------------------- | ------------------------- |
| `401 Unauthorized`          | Missing or invalid token  |
| `403 Forbidden`             | Insufficient permissions  |
| `500 Internal Server Error` | Unexpected server failure |


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://guardian.hedera.com/docs/develop/schemas/schema-creation-using-the-guardian-apis/returns-all-schemas-related-to-the-topic.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.