First Point of Call The CubeCart Extensions Marketplace is the first point of call for all store owners looking for the add ons they require. Listing your code here gets you direct access to this.   Automated Extension Installation Merchants can purchase your extensions quickly without registering and install extensions with a simple copy/paste of an install token. You don't even need to make any changes to your existing code.   No VAT Concerns! We handle all your European Union VAT