Hey @robcap ,
Evolve courses support xAPI launch using the URL. Basically the user info is available as part of the query params in the course window’s url. This article explains launching xAPi content in detail https://www.ht2labs.com/blog/launch-elearning-using-xapi/
You could also check out how Scorm Cloud are doing this by loading up your course on there and looking at the url of the displayed course.
Thanks
Sal