so my issue is according to the documentation (wich is pretty slim and not the greatest) the xml i have is everything that is required, but im getting this error code back <?xml version="1.0" e...

Using eVSCertifyRequest to create the USPS label and I am passing parameter as follows: https://secure.shippingapis.com/ShippingAPI.dll?API=eVSCertify&XML=<eVSCertifyRequest USERID="XXXXXXX...

Error is thrown when trying to retrieve the status of a USPS order using the USPS Tracking API. However, when running the code I built based on the USPS manual, I am getting the following error: "...

Why won't the rate work with USPS? I'm using ratev4 and I get an error: Error: API Authorization failure. RateV4 is not a valid API name for this protocol. UspsCom::DoAuth Here is my code: &lt...

I have 5 digit zip codes, these are retrieved from Google Maps Api. My dilemma is that I have to connect to a remote database which also contains addresses. If the address does not exist in that d...

I need to get shipping rates from USPS. I have signed up with them, got myself a user id and trying to use the sample request XML as shown on page - https://www.usps.com/webtools/htm/Rate-Calcula...