Is there a web gateway API for sending SMS to paid numbers?

Question

API

Hello. Is there an HTTP API web gateway for sending SMS to paid numbers? Give me a hint for a similar service. Thank you.
You need to send the following SMS:

Answer 1

does not exist

Answer 2

And how do you imagine why the service needs it, so that someone at their expense sends something there for a couple of million?
If you agree to make an advance payment of this couple of millions to this service, then I have another question - how will the service determine the price of a paid number before sending it and how will it charge you correctly, that is, how will the service charge the correct amount from your prepayment?