With the Stamps.com integration you can automatically create ready-to-print shipping labels for USPS, based on items in an order. With the Stamps.com integration, you can automatically create ready-to-print shipping labels for USPS, based on items in an order. Stamps.com seamlessly accesses the latest USPS rates when creating your labels, giving you unprecedented reliability, ease, and speed. With nearly 500,000 customers, Stamps.com has become the leading USPS postage provider in the country by simplifying access to the lowest USPS shipping rates and the most popular USPS services. Whether you ship one package a day or 1000, from your garage or a giant warehouse, Stamps.com has the tools to make your USPS® shipping process faster, more affordable and more efficient.