In reply to Bart.

You're correct -- not too many examples with METHOD="POST" and use of the IN= reference to drive it.

It looks like (from the API doc) that you can POST the data if you want. In that case, perhaps you can use SAS to create the CSV file, reference it with a fileref, supply that as the IN= argument, and use METHOD="POST". This will require experimenting on your part, obviously. But if you figure it out, "post" back here!