Santilab USPS ShipManager Although one can find comprehensive shipping information on USPS website, with USPS Rate Calculator and a minimum of programming you can bring that information to your website and retain your customer’s focus on the purchase. component provides easy access to USPS services: domestic and international rates address verification shipping time calculation online tracking and confirmation of delivery All you’d need to do in order to deploy that functionality on your website is provide the required configuration data.