Release Notes
05/27/2025
USPS APIs Release Notes

For the latest updates, please review the USPS APIs Release Notes.

Release Notes
05/20/2025
Priority Mail Next Day/Post Host Release Overview
Release Notes
05/16/2025
May 28, 2025 Release Notes
Release Notes
05/12/2025
May 25, 2025 Release
Release Notes
05/07/2025
May 18, 2025 Release Notes
Release Notes
04/28/2025
May 11, 2025 Release Notes
Release Notes
04/27/2025
July 2025 Release Notes
Release Notes
04/26/2025
Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Release Notes

These release notes summarize new features and enhancements implemented in deployments to the IV-MTR application.

Release Notes
04/15/2025
April 23, 2025 Release Notes
Release Notes
04/14/2025
April 13, 2025 Release Notes