Send a HTTP POST to retool

Can I POST to a retool app? I'm using retool as the front-end for an application with the backend running on a cloud server. A user can submit a job to the backend and I would like to be send a notification to the retool app when the job is done.

The alternative to would be to have a retool query that checks the database to see if the job is done, can I have a retool query that runs every 30 seconds? (this would not be great for performance).

Workflow webhook