When the payment transaction is to be completed using card, the payment_method field should be set to CARD in the post request collection body. For card payments, since we only support 3D. This means that the customer's card must be enabled for 3D authentication for them to complete their card payments. So in the request body, you should provide a redirect_url where the customer will be navigated to when they complete or cancel the transaction
redirect_url
It must be secured by SSL. ie, it must start with https://