Clarification about worker cost

Hi,

I just created my first worker to server custom 404 page. I have since manually triggered the 404 page 2-3 times to check if the worker is working. The metrics though has me confused, is this an expected metric log? Will I expect a high bill for this?

There are bot that scrape when a new SSL certificate has been issued, which there is for each .workers.dev domain, and make requests to them. The best way is to disable the workers.dev route on the worker and use a custom one.