Note: Shopping Cart is not required to order numbers, you may order on an individual basis.
Purpose: Add many orders to a cart, close out the cart
You like cleanliness don't you? We do too. That's the main purpose of the shopping cart. Say you order 1000 numbers. With other providers, you get an invoice for every single one of those if you order through the API (some even if you don't). With us, we think it's worth one extra http call to get all of those into a single invoice. Plus, it allows you to provide that functionality, very easily, to your customers. So win / win, right?