Shippo experienced intermittent USPS authentication failures over approximately 2.6 hours, causing some merchants using their own USPS carrier accounts to see missing USPS shipping rates. The issue began recovering before full resolution was confirmed. Service was restored to normal operation at 15:20 UTC on August 16, 2026.
Trusted by 1,000+ teams
Stop finding out about outages from your users. Monitor 6,320+ cloud services and get alerted the second something breaks.
This issue has been resolved and service back to operational.
We are currently experiencing intermittent issues with USPS authentication, which may result in missing USPS rates for some merchants using their own USPS carrier accounts.
USPS authentication has begun recovering, but intermittent failures are still occurring. Our team is actively monitoring the situation and will provide further updates as they become available.
With IsDown, you can monitor all your critical services' official status pages from one centralized dashboard and receive instant alerts the moment an outage is detected. Say goodbye to constantly checking multiple sites for updates and stay ahead of outages with IsDown.
Start free trialNo credit card required · Cancel anytime · 6320 services available
Integrations with