Requirements

Published on: January 2, 2026

Last updated: January 10, 2026

USPS OAuth Shipping exists for one reason: the USPS API landscape changed, and stores that depend on shipping accuracy need to change with it. USPS is actively deprecating legacy authentication methods in favor of OAuth 2.0. This affects how shipping rates are requested, authorized, and returned during WooCommerce checkout. Plugins that rely on older endpoints may continue to function temporarily, but they are increasingly fragile — prone to silent failures, incorrect rate quotes, or complete outages when legacy endpoints are retired.

M Media USPS OAuth Shipping is built directly against the current USPS OAuth API. There are no compatibility shims, proxy services, or deprecated endpoints involved. Rates are requested in real time, authenticated using OAuth 2.0, and returned directly from USPS based on the actual shipment data of the customer’s order.

From the store owner’s perspective, the goal is simple: accurate shipping rates, predictable checkout behavior, and no surprises. This plugin integrates cleanly into WooCommerce’s native shipping system, respects shipping zones, supports multiple USPS services, and includes safeguards such as sandbox testing and fallback rates to keep checkout functional even when upstream services misbehave. How do we know? We’ve been using it on SRO Records since the middle of November 2025

If you rely on USPS – now or in the coming years – this plugin is designed to be the stable, boring piece of infrastructure you don’t have to think about once it’s configured.

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