> 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/tokens/token-operations/token-apis/returns-token-serials.md).

# Returns Token Serials

**`GET /api/v1/tokens/{tokenId}/serials`**

Returns the serial numbers of non-fungible token instances owned by the current user for the specified token.

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

**Permission:** `Permissions.TOKENS_TOKEN_READ`

***

## Request

### Path Parameters

| Parameter | Type   | Required | Description                           |
| --------- | ------ | -------- | ------------------------------------- |
| `tokenId` | string | Yes      | The internal database ID of the token |

***

## Response

### Success Response

**Status:** `200 OK`

```json
[1, 2, 5, 12]
```

An array of serial numbers (integers) for the non-fungible token instances held by the current user.

### Error Responses

| Status                      | Description                  |
| --------------------------- | ---------------------------- |
| `401 Unauthorized`          | Missing or invalid token     |
| `403 Forbidden`             | Insufficient permissions     |
| `404 Not Found`             | User or token does not exist |
| `500 Internal Server Error` | Unexpected server failure    |