# List branch log field values

**GET** `/projects/{project_id}/branches/{branch_id}/logs/fields/{field_name}/values`

Lists the distinct values observed for a low-cardinality log field in
the requested time range. Call the log fields endpoint first to learn
which `field_name` values this branch supports; a field that branch has
never emitted is rejected with `unknown_field`.

Give the window either as `since` or as an explicit `start_time`;
supplying both is rejected. If neither is given, the previous six hours
are used. The maximum supported time range is seven days.

**Note**: This endpoint is currently in Private Beta.

Base URL: `https://console.neon.tech/api/v2`

Tags: `Logs`

## Authorization

Any ONE of the following options authorizes this operation; every scheme listed within an option is required together.

| Option | Scheme | Type | Sent as | Scopes |
| --- | --- | --- | --- | --- |
| Option 1 | `BearerAuth` | `http` | `Authorization: Bearer <token>` | — |
| Option 2 | `CookieAuth` | `apiKey` | cookie `zenith` | — |
| Option 3 | `TokenCookieAuth` | `apiKey` | cookie `keycloak_token` | — |

## Path parameters

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `project_id` | `string` | Yes | The Neon project ID |
| `branch_id` | `string` | Yes | The Neon branch ID |
| `field_name` | `string` | Yes | The log field whose distinct values should be returned. Must be one of the names returned by the log fields endpoint for this branch. |

## Query parameters

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `since` | `string` | No | Length of the lookup window, ending at `end_time` or at the current time when `end_time` is omitted. Mutually exclusive with `start_time`. Defaults to six hours. |
| `start_time` | `string` (date-time) | No | Inclusive beginning of the lookup window. Mutually exclusive with `since`. |
| `end_time` | `string` (date-time) | No | Exclusive end of the lookup window. Defaults to the current time. |
| `source` | `string` | No | Only consider records emitted by this Neon service. Allowed values: `function`, `storage`, `pg_endpoint`. |
| `limit` | `integer` | No | Maximum number of distinct values to return. The response sets `is_truncated` when this bound, or the server's own scan cap, cut the list short. |

## Responses

| Status | Description | Media type |
| --- | --- | --- |
| `200` | Distinct values for the requested log field | `application/json` |
| `400` | The lookup could not be served as written. The body is always `ProjectBranchLogsInvalidQuery` — see `reason` for the exact cause. | `application/json` |
| `404` | Logs are not available for this branch, or the project/branch was not found. The body is always `ProjectBranchLogsNotAvailable` — see `reason` for the exact cause. | `application/json` |
| `default` | General Error. The request may or may not be safe to retry, depending on the HTTP method, response status code, and whether a response was received. - If no response is returned from the API, a network error or timeout likely occurred. - In some cases, the request may have reached the server and been successfully processed, but the response failed to reach the client. As a result, retrying non-idempotent requests can lead to unintended results. The following HTTP methods are considered non-idempotent: `POST`, `PATCH`, `DELETE`, and `PUT`. Retrying these methods is generally **not safe**. The following methods are considered idempotent: `GET`, `HEAD`, and `OPTIONS`. Retrying these methods is **safe** in the event of a network error or timeout. Any request that returns a `503 Service Unavailable` response is always safe to retry. Any request that returns a `423 Locked` response is safe to retry. `423 Locked` indicates that the resource is temporarily locked, for example, due to another operation in progress. | `application/json` |

### Example response: 200 — Distinct values for the requested log field

```json
{
  "is_truncated": true,
  "values": [
    "string"
  ]
}
```

### Example response: 400 — The lookup could not be served as written. The body is always
`ProjectBranchLogsInvalidQuery` — see `reason` for the exact cause.

```json
{
  "code": "LOGS_INVALID_QUERY",
  "message": "string",
  "reason": "conflicting_filters"
}
```

### Example response: 404 — Logs are not available for this branch, or the project/branch was
not found. The body is always `ProjectBranchLogsNotAvailable` — see
`reason` for the exact cause.

```json
{
  "code": "LOGS_NOT_AVAILABLE",
  "message": "string",
  "reason": "branch_not_found"
}
```

### Example response: default — General Error.

The request may or may not be safe to retry, depending on the HTTP method, response status code,
and whether a response was received.

- If no response is returned from the API, a network error or timeout likely occurred.
- In some cases, the request may have reached the server and been successfully processed, but the response failed to reach the client. As a result, retrying non-idempotent requests can lead to unintended results.

The following HTTP methods are considered non-idempotent: `POST`, `PATCH`, `DELETE`, and `PUT`. Retrying these methods is generally **not safe**.
The following methods are considered idempotent: `GET`, `HEAD`, and `OPTIONS`. Retrying these methods is **safe** in the event of a network error or timeout.

Any request that returns a `503 Service Unavailable` response is always safe to retry.

Any request that returns a `423 Locked` response is safe to retry. `423 Locked` indicates that the resource is temporarily locked, for example, due to another operation in progress.

```json
{
  "code": "",
  "message": "string",
  "request_id": "string"
}
```

## Related pages

- [Accept a project transfer request](./acceptprojecttransferrequest.md)
- [Add an OAuth provider](./addneonauthoauthprovider.md)
- [Add an OAuth provider](./addbranchneonauthoauthprovider.md)
- [Add domain to redirect_uri whitelist](./addbranchneonauthtrusteddomain.md)
- [Add JWKS URL](./addprojectjwks.md)
- [Add trusted redirect URI domain](./addneonauthdomaintoredirecturiwhitelist.md)
- [AI Gateway](./tags/ai-gateway.md)
- [API Key](./tags/api-key.md)
- [Assign or update VPC endpoint](./assignorganizationvpcendpoint.md)
- [Auth](./tags/auth.md)

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