USPS API Migration Guide: Implementing OAuth 2.0 for European Shippers Before January 2026 Without Breaking Your TMS
The USPS Web Tools API platform will be retired on January 25, 2026, marking the end of an era for European shippers who rely on USPS for cross-border shipping. Continued use of this API is subject to disruptions starting in July 2025, meaning you have less than a year to