Program Requirements
06/18/2026
2027 PCC Leadership Award Program Guide
Applications/ Forms
06/18/2026
2027 PCC Leadership Award Nomination Form
Announcements
06/17/2026
INFORMATIONAL: USPS APIs System Release Notification - June 24, 2026
Announcements
06/17/2026
INFORMATIONAL: USPS APIs Systeme Release Notification - June 24, 2026
Announcements
06/17/2026
DELIVERY - Resumption of Mail Service to Niue - Effective June 22, 2026
Announcements
06/17/2026
INFORMATIONAL - Postal Service Prepares for Championship Celebration Parades
Announcements
06/17/2026
INFORMATIONAL - Retirement of USPS Tracking v3.0 and Tracking Webhook Subscriptions v3.0 APIs
Tech Guides
06/16/2026
PostalOne! Release 64.0.0.0 Mail.XML PROD WSDLs

This ZIP file contains the Web Services Description Language (WSDL) and XML Schema Definition (XSD) files for Mail.XML™ PROD Release 64.0.0.0

Tech Guides
06/16/2026
PostalOne! Release 64.0.0.0 Mail.XML TEM WSDLs

This ZIP file contains the Web Services Description Language (WSDL) and XML Schema Definition (XSD) files for Mail.XML™ TEM Release 64.0.0.0

Tech Guides
06/16/2026
PostalOne! Release 64.0.0.0 Mail.XML PrePROD WSDLs