USPS api - using curl and codeigniter

[strippher]

I am trying to develop a USPS rate calculator for a cart that I am building in codeigniter. I am having issues getting getting success responses from the USPS test server and their api. I have called in with my issues and apparently, they don't want to provide any support to anyone trying to create a custom solution. To make it more confusing, they told me that all I need to know can be found in their Development Guide v3.pdf, but in it they state: Step 3: Run