How to set up yandex kassa?

Question

MODX

We were given the task to tie a cash register to the site on MODX Revo yandex. I read the documentation and, as I understand it, this checkout is more intended for online stores. So. This site is not an online store. The client wants to be able to pay for the service. Ie on one page there is a form to fill out. She now just sends letters to the client's mail. So he wants a button next to him - pay, so that a person can click and proceed to payment. There is connection data, but here's the problem. The site has some kind of AJAX submission, which is hung up on all forms on the site. In order for this cash register to work, it seems like a form is needed (it has already been installed). I also need some kind of shopkeeper (I also installed it, though I don’t know why).
So the question is - is there any way to do this at all? What would it be possible to just pay like this?

Answer 1

simplified version of the level https://money.yandex.ru/get/?for=private

Answer 2

Minishop2+100500 payment add-ons .