> 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/system-schemas-apis/returns-schema-by-username.md).

# Returns Schema by Username

**`GET /schemas/system/{username}`**

Returns a paginated list of all system schemas for the specified user. Only users with the Standard Registry role are allowed to make this request.

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

**Permission:** `Permissions.SCHEMAS_SYSTEM_SCHEMA_READ`

***

## Request

### Path Parameters

| Parameter  | Type   | Required | Description                  |
| ---------- | ------ | -------- | ---------------------------- |
| `username` | string | Yes      | Username of the schema owner |

### Query Parameters

| Parameter   | Type   | Required | Default | Description           |
| ----------- | ------ | -------- | ------- | --------------------- |
| `pageIndex` | number | No       | 0       | Zero-based page index |
| `pageSize`  | number | No       | 25      | Items per page        |

***

## Response

### Success Response

**Status:** `200 OK`

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

```json
[
  {
    "id": "63e3e5e8a01b3c001234abcd",
    "name": "Example System Schema",
    "entity": "STANDARD_REGISTRY",
    "status": "PUBLISHED",
    "system": true,
    "active": true,
    "owner": "example_user"
  }
]
```

### Error Responses

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