It sounds to me as if you are effectively trying to consume this URL as a web service.
Check out Scott Klement’s excellent HTTPAPI which you can find at www.scottklement.com. It gives you the ability to access web pages from within an RPG program (i.e. the program acts as the client). It also includes a port of the EXPAT XML parser which will make it much easier for you to parse the content if it is in XML. Scott has also written articles on using this parser which you can find at www.iseriesnetwork.com.