Integration of the IEPay API requires an M ID and API key to be prepared in advance. if you don't have one, you can get one from self-service (opens new window).
Version 3.x URL
https://mypaynz.com/api/
Version 2.x URL
https://a.mypaynz.com/api/
If you can't wait to start integrating the IEPay API immediately, you can get a test account directly from Contact Us.