From the
FAQ:
Q: Is there a charge for the USPS Shipping Assistant V2.1?
A: No. This program is offered at no charge to USPS customers
Q: Why should I use the USPS Shipping Assistant?
A: The USPS Shipping Assistant 2.1 stands on its own as a comprehensive package shipping solution for customers, providing accurate shipping information right from your PC. And, there is no worry that you might have missed an important update - all changes are done on Postal Service servers, which means that you will always receive the most current and accurate information available.
Additionally, the Delivery Confirmation shipping label with the added feature of email notification is unsurpassed in customer convenience - no more having to affix separate labels or include additional postage for this service. Delivery Confirmation is provided at the electronic rate. This means at no charge for Priority Mail and only 12 cents for Package Services!
The Shipping Assistant provides access to shipping information - package track/confirm, rates, even shipping labels! Use it in your front office, shipping department and customer service center! It's easy, it's convenient and it's free!