Quickpay is an online payment solution for merchants that allows the secure integration of credit and debit cards with an arbitrary site on the Internet. The service works with all major credit cards as well as Paypal, Sofort Banking, and other e-banking facilities.
The QuickPay API enables merchants to handle payments in a simple manner. Based on SSL encrypted HTTP communication, all actions are performed by sending a HTTP POST request. Responses are sent as an XML document.