USPS rate requests fail on missing dimensions or ZIP
USPS rate requests fail with a 400 validation error when product weight, dimensions or ZIP codes are missing, breaking the cart page.
Tier II · Emerging Problems that are still building up.
3 public reports · first reported 10 June 2025 · last reported 27 September 2026
What's going wrong
Store owners using the USPS live rates plugin with the REST API see a validation error on the cart or checkout page, sometimes with no rates shown at all.
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 3 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.