FedEx SOAP API Shutdown Silently Broke WooCommerce Shipping Rates at Checkout

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FedEx permanently retired its legacy SOAP Web Services on June 1, 2026, requiring all integrations to migrate to its newer REST API with OAuth 2.0 authentication. WooCommerce stores still relying on the old endpoints stopped receiving FedEx shipping rates at checkout, but showed no visible errors or downtime alerts. Because an empty rate response is treated as a normal outcome by WooCommerce, checkout pages continued loading and uptime monitors reported no issues, masking the failure entirely. Stores with flat-rate fallback options continued processing orders, leaving merchants unaware that FedEx rates had silently vanished. The migration also requires store owners to provide new credentials from their FedEx accounts, meaning developers cannot complete the transition without direct merchant involvement.

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