i have registered myself with usps.com/webtools and get username/password.
when i am sending test request to usps test server, i am getting error "Error getting USERID attribute"
http://testing.shippingapis.com/ShippingAPITest.dll?API=[API_Name]&XML=[XML_String_containing_User_ID]"
i am sending request like this (userid is dummy in this case)
http://testing.shippingapis.com/ShippingAPITest.dll?API=ZipCodeLookup&XML=
<userid>
018BITOC5420</userid>
how to sent test request with xml userid?