I see that there is websocket endpoint which works out fins with Java tests. In logs I see
Connecting to: ws://127.0.0.1:8080/76f48a44-0af8-444c-ba97-3f1ed34af
This did the trick for me:
$ curl -i -N -H "Connection: Upgrade" -H "Upgrade: websocket" -H "Host: echo.websocket.org" -H "Origin: http://www.websocket.org" http://echo.websocket.org
from: http://www.thenerdary.net/post/24889968081/debugging-websockets-with-curl