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API Governance
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Technical AnalysisMarch 10, 2026
USPS API Access Control: What April 1, 2026 Actually Changed
USPS switched tracking from possession-based to identity-based access on April 1, 2026. What landed, who it hit, and how it led to the August license.
9 min readArchitectureMarch 10, 2026
USPS April 2026 Access Control: The Architecture That Survived It
Access Control landed April 1 and the license regime followed on August 1. The integration shape that absorbed both, and the checks to run now.
8 min read