What you are asking for is basically a ‘web service’, since you do not need the data to be presented in any way in a browser.
You will need to ask the supplier if their solution has a web service which returns that data that you need; – if not, it cannot be done (according to my present knowledge …).
If anybody has supplemental comments on this subject, please add them to this thread, – I believe that many of us would like to be able to ‘screen-scrabe’ data from a website..
The answer here may be the same as the comment to Calling a URL length more than 200 from CLP. There are freeware utilities that can help. The link for Scott Klement’s HTTPAPI service program in that thread is as good of a starting point as it’s likely to get.
If the HTTPAPI isn’t useful or if usage of it leads to specific questions, then more specific answers may be possible. As noted by DanTheDane, there is much more to this than simply supplying some sample source code.