> For the complete documentation index, see [llms.txt](https://dev.guardian.hedera.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.guardian.hedera.com/developer-tools-and-resources/api-reference/schema-creation-using-the-guardian-apis/creation-of-a-schema-1.md).

# Listing of Schema

**`GET /api/v1/schemas`**

Returns a paginated list of all schemas owned by the authenticated Standard Registry user.

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

**Permission:** `Permissions.SCHEMAS_SCHEMA_READ`

***

## Request

### 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`)          |
| `policyId`  | string | No       | —       | Filter schemas by policy ID                     |
| `moduleId`  | string | No       | —       | Filter schemas by module ID                     |
| `toolId`    | string | No       | —       | Filter schemas by tool ID                       |
| `topicId`   | string | No       | —       | Filter schemas by topic ID                      |

***

## Response

### Success Response

**Status:** `200 OK`

The response includes an `X-Total-Count` header containing 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 |