geoperformancecontroller : ask to make a test
Good. you have your key and you have take a look of documentation reading this article.
Now, to ask webpagetest to make a test for me, i used php. My php call url like those
I think using json asnwer is easier than xml, so you can add f=json query param
another advise is to make timeout higher : you can’t find hints on documentation, but you can add time=600 to your query param to makes test waiting longs until you webpage answered totally.