Hello Kenny,
Greetings !!
Please let us know if you see the
"Gateway URL" option on your end after selecting "Custom" in the
Select Payment Gateway option (Refer to the screenshot below for more details).
If you do have access to the "Gateway URL" option, please refer to the help document below. It provides a step-by-step guide on how to integrate a custom payment gateway with Pabbly Subscription Billing.
Custom Payment Integrate help document :-
Pabbly Subscriptions provides an open API from which you can integrate any payment gateway with the Pabbly Subscriptions account.
www.pabbly.com
If you have any other concerns, please feel free to contact us. We are always happy to assist you.