> For the complete documentation index, see [llms.txt](https://docs.halosecurity.com/api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.halosecurity.com/api/events-archive/website-header-monitor-change.md).

# website-header-monitor-change

### Overview

* **Key:** `website-header-monitor-change`
* **Name:** Monitored Website Header Changed
* **Triggers when:** The value of a monitored HTTP header is detected as different than during the previous website scan

### Fields

| Field      | Type    | Description                              |
| ---------- | ------- | ---------------------------------------- |
| mon\_name  | string  | Name of monitored header                 |
| mon\_value | string  | Previous value of monitored header       |
| scan\_id   | string  | ID of the scan                           |
| target\_id | integer | ID of the target                         |
| value      | string  | Newly detected value of monitored header |

### Example data

```json
{
  "mon_name": "x-request-id",
  "mon_value": "abcd1234abcd1234abcd1234abcd1234",
  "scan_id": "202101010000x1Xx2Xx3Xx4Xx5Xx6Xx7",
  "target_id": 123456,
  "value": "wxyz9876wxyz9876wxyz9876wxyz9876"
}
```