Magento 2 USPS Shipping Extension – Real-Time USPS Rates via REST API v3
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✔ Product updates and support for 12 months
Upgrade USPS shipping to the OAuth-secured REST API with real-time rates and labels.
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Official USPS REST API v3: Integrates with USPS OAuth REST API (Domestic Prices v3) using OAuth 2.0. USPS
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Real-time checkout rates: Live USPS quotes at checkout sourced directly from USPS.
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OAuth 2.0 security: Client credentials flow, secure credential handling, and token management.
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Smart rate filtering: Show the cheapest option per service class (Priority, Express, etc.) and optionally limit results to Top N methods.
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Intelligent rate caching: Configurable TTL to cut repeat calls and keep checkout fast on common routes.
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Sandbox mode: Test end-to-end behavior without impacting production usage.
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Admin testing tools + CLI checks: Test connection and sample rate fetching in Admin, plus a CLI harness for repeatable diagnostics.
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Quota protection: Supports ShippingGuard-style protections to reduce quota exhaustion during high-traffic or repeated address-entry calls.
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Structured logging: Clear diagnostics for troubleshooting without exposing secrets.
Description / Magento 2 USPS Shipping Extension – Real-Time USPS Rates via REST API v3
Magento 2 USPS Shipping Extension – Real-Time USPS Rates via REST API v3
A powerful Magento 2 extension designed to enhance your store's functionality and streamline operations.
Got a USPS letter about Web Tools? You need this.
USPS has announced that the legacy Web Tools API platform shuts down on Monday, January 25, 2026, and Web Tools users must migrate to the newer USPS APIs to avoid disruption. USPS also notes that continued use is subject to disruptions starting in July 2025, ahead of the full retirement. If you received a physical USPS notice in the mail, it’s a strong signal your current integration is still using Web Tools (RateV4/IntlRateV2/TrackV2 style services). This extension is built specifically to migrate Magento 2 stores to USPS’s OAuth + REST platform.Official USPS REST API v3 integration
Connects directly to USPS’s OAuth-secured REST API for accurate, future-proof domestic shipping rates.
Real-time checkout rates
Displays live USPS pricing at checkout based on destination, weight, and service level—no flat estimates.
OAuth 2.0 security & token management
Uses the USPS client-credentials flow with automatic token handling for secure, compliant API access.
Want this installed and configured?
We can install Magento 2 USPS Shipping Extension – Real-Time USPS Rates via REST API v3, configure it for your store, and validate it across your theme and requirements.