Entirely feasible. Also reasonable for you to pay me for the service as it is taking my development efforts to meet your business model. The advantage to you is you have a defined interface that I won't prevent.
I guess you missed the comment I was replying to: it may cost you more money, in bandwidth and per page resources, to not provide an API than it does for you to provide one.
So no, I won’t pay you for the privilege of you saving money.
So no, I won’t pay you for the privilege of you saving money.