NopCommerce is the most popular ASP.NET shopping cart in the world based on Microsoft technologies. It is a free and open-source eCommerce platform. Accept payments in your NopCommerce webshop - with a Payrexx payment plugin that is free and easy to integrate.
In your NopCommerce account go to "Configuration > Local plugins".
Choose the green button "Upload plugin or theme".
Upload the previously downloaded plugin under “Upload plugin or theme”. It can take a few seconds.
Activate the Plugin
Scroll down until you see "Payrexx". Choose "Edit".
Activate it by clicking the checkbox "Is enabled". Save your settings.
Configuration - NopCommerce
Press on "Configure".
Now you have to fill in two fields and in order to do this, you will have to switch between two different pages. We recommend that you keep your Payrexx account in one tab and your NopCommerce in another tab open.