Hi Thomas,
Answer to your question is yes but keep reading a little further !!!
You are lucky since I spent quite a lot of time yesterday on that actually ;)
- The trick is to first make a call to REST API Operation you want (e.g. .../new_instance) and then you normally get something about login issue (keep your session instance alive ;) )
- Then you authenticate with the same session
- Finally you call the REST API you want and it is working !
For further information you can have a look to this post : https://community.jboss.org/message/605467#605467, you should fix your problem.
Leave a feedback if it is ok for you !
If you succeed in passing parameters to a process via REST API don't forget to share as well ;)
Anyone else can help on my problem?
Thanks