Log into your Shift4Shop Online Store Manager.
Use the left navigation menu and go to Marketing > Shopping Engines.
Look for the "Shop.com Export" section located on the right side of the page.
While viewing the Shop.com Export Plugin, click on the Generate Feed link.
The store will generate the feed XML for you to select all (ctrl-a), copy (ctrl-c), and paste (ctrl-v) to your Shop.com account as needed.