Release Notes
10/05/2026
Bulk Rates API Release Overview
Release Notes
10/04/2026
October 4 2026 - PO! and ProgReg - Release Notes
Release Notes
09/30/2026
USPS APIs Release Notes

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

Release Notes
09/29/2026
January 2027 Release Overview
Release Notes
09/25/2026
September 24, 2026 COP Release 2.5.6
Release Notes
09/20/2026
September 20 2026 Time Limited Price Change (TLPC) 2026 [October] Release Notes
Release Notes
09/14/2026
September 20, 2026 - FAST R69.0.1.0 Release Notes
Release Notes
09/10/2026
PTR2 Release Notes_DD_09_12_26
Release Notes
09/04/2026
Enterprise Payment System (EPS) Release Notes-September 13, 2026
Release Notes
08/28/2026
October 2026 - Timelimited Price Change Release Overview