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Getting Started & FAQ
FS Table Rate
Live Rates
Independent shipping plugins
Add-on plugins
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USPS
Troubleshooting & Error resolution
Troubleshooting & Error resolution
USPS – How to enable debug mode?
Errors
USPS – API Authorization failure. User is not authorized to use API RateV4
USPS – The client application credentials provided in the request are missing, invalid, inactive or not approved for access
USPS – USPS Live Rates: Unable to calculate international postage. No services available
USPS – “Description”: “User Id and Shipper Number combination is not qualified to receive negotiated rates”
USPS – You have USPS shipping methods that are not configured for the REST API
USPS – Authorization failure. Perhaps username and/or password is incorrect.
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