Check out Spreedly. https://spreedly.com/ https://spreedly.com/ Integrate once and your app/site now supports 71 different payment gateways. You can test and s

Check out Spreedly. https://spreedly.com/ https://spreedly.com/ Integrate once and your app/site now supports 71 different payment gateways. You can test and swap them just by changing one token in your code. Here's the supported gateways, including 8 in Poland: https://spreedly.com/gateways https://spreedly.com/gateways