As an alternative to implementing towards our REST APIs, you can also use one of our supported open source webshop modules, if you have a platform that support one of these.
An overview of the modules will be listed below, and they will soon be avaiable at the PayEx GitHub site. The modules are for the time being under development.

Magento 2.x (PayEx Checkout)

Requirements

Magento Community & Enterprise Edition versions:

• 2.1.* (excludes 2.1.3 due to Magento core bugs)
• 2.2.* 

PHP Version

• PHP 5.6.x (only on Magento 2.1)
• PHP 7.0.x
• PHP 7.1.x (only on Magento 2.2)

We strongly recommend PHP 7.0 or higher