USPS Web Tools Update - Effective June 1st 2015

We’re seeing this issue come up for a number of our clients, so we thought we’d put the word out for anyone who owns or operates an e-commerce website that is using USPS for shipping estimates and services.

If you fall into this category, you will want to conduct a test transaction on June 1st 2015 to ensure that USPS web tools updates did not adversely effect your website. 


Thank you for using USPS Web Tools.

May 31, 2015 USPS Web Tools will be implementing modifications and additional features to the U.S. Postal Service APIs.

The following changes may especially impact shipping systems:
Origin ZIP Code required for Priority Mail International to Canada
Modified special services
Modified service IDs
Modified available mail classes for Merchandise Return Services

Detailed release notes are available on the Web Tools home page at under the Web Tools Announcements section.

Included in the release notes are the URLs of the staging environments, which are now available to developers for testing.

To receive future Web Tools updates, follow us on Twitter @USPSWebTools. If you have any questions, encounter any issues, or have any feedback, please let us know by simply replying to this email.

Thank you,
USPS Web Tools Program Office”

Let us know if your website is adversely affected by these updates -- we would be happy to assist in updating your site to resolve these issues!