Shipping rates stop after USPS API switch
After USPS retired its legacy API, the shipping plugin stops returning rates and merchants get no migration help.
Tier II · Emerging Problems that are still building up.
4 public reports · first reported 14 March 2025 · last reported 15 June 2026
What's going wrong
Merchants who use the USPS Shipping Method extension report that live rates vanished after USPS moved from its legacy Web Tools interface to new REST APIs, leaving carts without shipping options.
AI-assisted: written with the help of AI from the reports. The idea report has the full summary.
In the idea report
- The full summary.
- The products the 4 reports are about, and how many came each month.
- Related problems.
No business has been found with this problem yet, so the report has no contacts. All sales are final — no refunds. Pricing.