Notes

Use the file as a trigger

The Persist function will create a file at a specified path (with the TXT value and domain as content). The file will be polled for changes. A specific format is required.

The user will have to edit the file manually to add a specific value (ex: "status": "ok").

Use an HTTP call as a trigger

The Persist function will make an HTTP call.

I think it is not a secured approach.