Carrier Webhook Authentication Crisis 2026: How European Shippers Can Build Production-Resilient Systems to Prevent 73% OAuth Migration Failures Before Silent Tracking Breaks Customer Experience
European shippers face a carrier webhook authentication crisis that UPS completed their OAuth 2.1 migration on January 15, 2025. By February 3rd, 73% of integration teams reported production authentication failures. This isn't isolated to UPS. Some reports on carrier integrations have shown a silent failure rate as
