January 21, 2014

By: Marketing Team,



The United States Postal Service notified merchants that it will be releasing an update to its postal rates API effective January 24, 2014. Details on the API changes are provided on the USPS web site.

Magento reviewed and tested the proposed changes with the latest versions of Magento Enterprise Edition, Magento Community Edition, and Magento Go. Based on this work, we don’t expect Magento merchants to experience any issues with the API update.

Magento Platinum Industry Partner WebShopApps conducted their own tests of Magento Community Edition version 1.4 to 1.8 and Magento Enterprise Edition version 1.7 through 1.13 against this change. WebShop Apps concluded that “based on this research, we expect there will no interruption of service to USPS users on Magento.” Additional details of their findings can be found on the WebShopApps blog.

While the API changes won’t disrupt existing services, they will enable a previously announced price increase and changes to some of the services offered. As WebShopApps notes, notable changes include:

  • Price increase details as announced in the Sept 25, 2013 USPS press release require no action. Customers will automatically see the updated rates.
  • Standard Post service has been removed for zones 1 – 4, for both rates and labels. Customers who rely on this shipping method should ensure this will not have any negative repercussions.
  • Additional services offered by USPS include: “Priority Mail Express 1030 AM Delivery” and “First Class Metered.” Please note that these new services will not be automatically supported by Magento.

If you have additional questions about the USPS API or associated service changes, we recommend that you contact the USPS directly.