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