What is Swsim?

The Stamps.com Web Services for Individual Meters (SWS/IM, SWS for short) API provides web services for creating an integrated solution for shipping via the United States Postal Service (USPS) and other carriers.

How can I tell if my stamps are still good?

How Do I Know If My USPS Stamps Are Still Good? A simple glance is all you need to do to know if your USPS stamps are still good. If your stamps have the word “Forever” printed somewhere, then feel free to stick one on an envelope and put your letter in the mail (as long as it weighs less than one ounce!).

How do I contact stamps com?

(855) 889-7867Stamps.com / Customer service

How do I download the 64-bit version of stamps?

Download Stamps.com 64-bit version. Mac Users: Go to Stamps.com Online to print postage from any web browser. Stamps.com software is only compatible with Windows computers. Already downloaded the software? Please look for the Stamps.com icon on your desktop and click it to launch Stamps.com.

What version of stamps does the prolabel printer work with?

The ProLabel Printer only works with version 10.1.1 or later of the Stamps.com software. Skip this step if you are on a supported version. A. Download Download the latest version from

How do I access stamps com on my Desktop?

Please look for the Stamps.com icon on your desktop and click it to launch Stamps.com. Stamps.com version 18.5 includes the latest fixes and enhancements for the upcoming holiday shipping season.

Can I use stamps on my operating system?

Sorry, your operating system is currently not supported by the Stamps.com software. Please try again with either Microsoft Windows XP or newer, or Mac OS 10.9 or newer on a Macintosh with an Intel processor. Download Stamps.com 18.5 today!