Are there analogues of the Sprypay electronic payment system?

Question

Payment systems

I would like to find a payment system that did not require legal. faces and with a clear API.
Interkassa is not suitable, because PrivatBank and everything works quite crookedly. I would also like the success page and the payment processing script to be in different places, although this is not necessary. (This was the choice factor for sprypay initially)