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.
Download the free Payrexx plugin
Log in to your user account at NopCommerce.
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.
Scroll down until you see "Payrexx". Choose "Edit".
Activate it by clicking the checkbox "Is enabled". Save your settings.
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.
Example: YourName.payrexx.com Instance-name: YourName
Both, the instance name and the API Secret Key you will find in your Payrexx backend (see the next steps).
Log in to your Payrexx account and go to "API & Integration".
Now add NopCommerce under "Add E-Commerce Integration".
Fill in your shop address in the plugin configuration under "Enter shop address". Under configure, you will also find the API key and instance name required by NopCommerce.