> 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/guardian/standard-registry/schemas/schema-creation-using-apis/creation-of-a-schema-1.md).

# Listing of Schema

**`GET /schemas`**

Returns all schemas.

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

**Permission:** `Permissions.SCHEMAS_SCHEMA_READ`

***

## Request

### Query Parameters

| Parameter   | Type    | Required | Description                                                           |
| ----------- | ------- | -------- | --------------------------------------------------------------------- |
| `pageIndex` | Integer | No       | The number of pages to skip before starting to collect the result set |
| `pageSize`  | Integer | No       | The number of items to return                                         |
| `category`  | String  | No       | Schema category                                                       |
| `policyId`  | String  | No       | Policy ID                                                             |
| `moduleId`  | String  | No       | Module ID                                                             |
| `toolId`    | String  | No       | Tool ID                                                               |
| `topicId`   | String  | No       | Topic ID                                                              |

***

## Response

### Success Response

**Status:** `200 OK`

Returns an array of schema objects. The total item count is provided in the `X-Total-Count` response header.

```json
[
  {
    "id": "f3b2a9c1e4d5678901234567",
    "uuid": "f3b2a9c1e4d5678901234567",
    "name": "Schema name",
    "description": "Description",
    "entity": "string",
    "iri": "string",
    "status": "string",
    "topicId": "f3b2a9c1e4d5678901234567",
    "version": "1.0.0",
    "owner": "string",
    "messageId": "f3b2a9c1e4d5678901234567",
    "category": "string",
    "documentURL": "https://example.com",
    "contextURL": "https://example.com",
    "document": {},
    "context": {}
  }
]
```

### Error Responses

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