Swipe supports what's called "Authorize.Net AIM Emulation Mode". Simply contact your gateway (i.e. BluePay) and ask them for the correct URL to use for AIM emulation mode. Then open the Settings app on your phone (not in Swipe), scroll down to Swipe in the list, click it, and then enter the URL they gave you for "Gateway URL". Omit the "https://" part.