> 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/logs-apis/returning-log-attributes.md).

# Returning Log Attributes

**`GET /logs/attributes`**

Returns a list of log source attribute names, optionally filtered by a name substring. For Standard Registry users only.

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

**Permission:** `Permissions.LOG_LOG_READ`

***

## Request

### Query Parameters

| Parameter            | Type      | Required | Description                                         |
| -------------------- | --------- | -------- | --------------------------------------------------- |
| `name`               | string    | No       | Substring to search within attribute names          |
| `existingAttributes` | string\[] | No       | Attributes already selected (excluded from results) |

***

## Response

### Success Response

**Status:** `200 OK`

```json
["API_GATEWAY", "WORKER", "GUARDIAN_SERVICE"]
```

### Error Responses

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