Thank you for using USPS Web Tools.
September 7, 2014 USPS will be implementing changes and additional features to the Web Tools APIs. Detailed release notes are available on the USPS Web Tools home page at www.usps.com/webtools.
The CAT/staging environment is now available to developers for testing using your Web Tools user ID and the following URLs:
Secure APIs: https://stg-secure.shippingapis.com/ShippingApi.dll
Non-secure APIs: http://stg-production.shippingapis.com/ShippingApi.dll
To ensure we have the best contact information for you, please take a few moments to complete our four-question contact form by clicking the following link:
Web Tools Customer Contact Form
Please email us at WebTools@usps.gov if you have any issues or questions. You can also reach us on twitter @USPSWebTools for updates and announcements.
USPS Web Tools Program Office
USPS RateV4 Intl RateV2 – September 7, 2014 Version K5 for Zen Cart released. If you are using this module, you need the update.