USPS OAuth Shipping

Published on: January 7, 2026

Last updated: January 10, 2026

Support and troubleshooting for USPS OAuth Shipping, M Media’s WooCommerce plugin for real-time USPS shipping rates using OAuth 2.0 authentication.

📦 Contact USPS Shipping Support

Get help with OAuth authentication, rate calculation issues, label generation, or unexpected behavior.

Open Support Form

📚 USPS Shipping Documentation

Setup guides, API configuration, shipping zone configuration, and troubleshooting references.

View USPS Docs

Common USPS OAuth Shipping Issues

401 Unauthorized Errors

  • Verify Client ID and Client Secret are correct
  • Confirm USPS API credentials are Active status
  • Check Prices API is enabled in your USPS account
  • Enable Sandbox Mode if using test credentials

No Shipping Rates Showing

  • Ensure products have weights configured
  • Verify origin ZIP code is set correctly
  • Check WooCommerce store address is complete
  • Test API connection in plugin settings

Incorrect Rate Calculations

  • Verify product weights and dimensions are accurate
  • Check rate adjustment percentage settings
  • Review handling fee configuration
  • Ensure weight units match your products (lbs/kg)

International Shipping Issues

  • Confirm international services are enabled
  • Verify destination country is supported by USPS
  • Check customs declaration settings
  • Ensure package dimensions don’t exceed limits

USPS OAuth Shipping System Requirements

WordPress & WooCommerce

  • WordPress 5.8+
  • WooCommerce 5.0+
  • PHP 7.4+
  • HTTPS enabled (required for OAuth)

USPS API Access

  • Valid USPS Business Account
  • API Client ID and Client Secret
  • Prices API access enabled
  • Active API credential status

Before You Contact USPS Shipping Support

  • Plugin version number
  • WordPress and WooCommerce versions
  • PHP version
  • Whether using Sandbox or Production mode
  • Error messages from debug log
  • Screenshot of issue or settings page
  • Steps to reproduce the problem
  • License key (last 6 characters only)

Key Features

📦

OAuth 2.0 Secure

⚡

Real-Time Rates

🏷️

Multiple Services

🌍

International Support

💰

Rate Adjustments

🔄

Weight Conversion

🛡️

Fallback Rates

🎯

Shipping Zones

🤖
Support Bot
"Have you tried restarting your computer? Please check our knowledge base. Your ticket has been escalated. Estimated response: 5-7 business days."
❌ Corporate Script Theater
👨‍💻
Developer (M Media)
"Checked your logs. Line 247 in config.php — the timeout value needs to be increased. Here's the exact fix + why it happened. Pushed a patch in v2.1.3."
✓ Real Technical Support

Support From People Who Understand the Code

Ever contact support and immediately know you're talking to someone reading a script? Someone who's never actually used the product? Yeah, we hate that too.

M Media support means talking to developers who wrote the code, understand the edge cases, and have probably hit the same problem you're dealing with. No ticket escalation theatrics. No "have you tried restarting?" when your question is clearly technical.

Documentation written by people who got stuck first. Support from people who fixed it.

We don't outsource support to the lowest bidder or train AI on canned responses. When you ask a question, you get an answer from someone who can actually read the logs, check the source code, and explain what's happening under the hood.

✓ Real troubleshooting, not corporate scripts
✓ Documentation that assumes you're competent
✓ Email support that doesn't auto-close tickets
✓ Updates based on actual user feedback
Tracking Scripts ❌
Telemetry Services ❌
Anonymous Statistics ❌
Your Privacy ✓

No Bloat. No Spyware. No Nonsense.

Modern software has become surveillance dressed as convenience. Every click tracked, every behavior analyzed, every action monetized. M Media software doesn't play that game.

Our apps don't phone home, don't collect telemetry, and don't require accounts for features that should work offline. No analytics dashboards measuring your "engagement." No A/B tests optimizing how long you stay trapped in the interface.

We build tools, not attention traps.

The code does what it says on the tin — nothing more, nothing less. No hidden services running in the background. No dependencies on third-party APIs that might disappear tomorrow. No frameworks that require 500MB of node_modules to display a button.

✓ Your data stays on your device
✓ No "anonymous" usage statistics
✓ Minimal dependencies, fewer risks
✓ Respects CPU, RAM, and battery