WebSocket usage in 5.1?

I am currently using the BestHTTP Pro asset to open a connection and send API requests to a webserver.

Is there a way to use WebSockets without a plugin, for standalone Windows and OS X projects using 5.1 and UNet?

So far on transport layer only.
in the demo folder llapi example works using udp socket or as web application using websockets (you need compile them as webgl and use as client)

we are working on full support hlapi under web right now, but i cannot promise that this work will finish tomorrow:(