Been a long time since I tried to deploy Magento. It can hurt sometimes.
Looked at USPS web tools updates.
“Application: Web Tools APIs”
“Package Name: 7 March 2014 Updates”
“Package Version: 1.2”
Updates noted herein will be available in the Web Tools testing environment for integrator access on Feb 25, 2014. The test environment can be accessed, using your production UserID, via the following URL scheme, host and path:
Secure APIs: https://stg-secure.shippingapis.com/ShippingApi.dll
Non-secure APIs: http://stg-production.shippingapis.com/ShippingApi.dll
Is it just me or did the URL change!?! I cannot find any post reflecting this change.