Overview
VibeFox USPS adds a USPS shipping method to Magento Open Source and Adobe Commerce. It gets live rates from the current USPS APIs with OAuth 2.0 for domestic and international parcels and shows the customer one USPS option with the cheapest of the services you select. Fixed prices take over when USPS gives no rate.
It suits stores that mail parcels from the United States with USPS. The legacy Web Tools API, retired by USPS in January 2026, is not used. The module calculates rates only. It does not buy postage or labels, book pickups, track parcels, offer Post Office or pickup location selection, or add insurance and other extra services.
Key features
Current USPS APIs: OAuth 2.0 with Domestic Prices 3.0 and International Prices 3.0. Production and the USPS Testing Environment for Mailers.
Your choice of services: USPS Ground Advantage, Priority Mail, Priority Mail Express, First-Class Package International Service, Priority Mail (Express) International, Media Mail and Library Mail. The cheapest selected service is shown and saved with the order.
Honest prices: only regular single-piece prices for your parcel. Flat Rate, Cubic, Hold for Pickup and Sunday prices are never picked just because they are cheaper. Retail or Commercial prices.
Currency handling: USPS prices are in USD. In a store with another base currency they are converted with your USD exchange rate, never shown as another currency. Magento shows the price in the customer's currency.
Correct parcel: weights converted from your store unit (lbs or kgs) to pounds, a default weight for products without one, and a box size in centimetres for the whole parcel.
Fixed prices as fallback: a price table by country with weight tiers and a fallback price, per order or per item, used without API keys and when USPS does not answer.
Fast checkout: quotes are cached for 1 hour. After errors USPS is paused for 5 minutes, so an outage does not slow down every checkout update.
Standard Magento settings: all settings are on the standard Delivery Methods configuration page, with settings per website, an encrypted Consumer Secret, free shipping from a subtotal, minimum subtotal, weight limits, the countries you ship to, a debug log viewer and the price source of every order in the admin order view. Magento cart price rules with free shipping work as usual.
Requirements
Magento Open Source or Adobe Commerce 2.4.6 to 2.4.9 (your own server or Adobe Commerce on cloud infrastructure; not Adobe Commerce as a Cloud Service), PHP 8.1 to 8.4. An app in the USPS Developer Portal (Consumer Key and Consumer Secret) and a 5-digit US ship-from ZIP code. Fixed prices work without keys. A VibeFox license key from vibefox.net (one key per domain).