Open World Sever 2022 status & requirements

Hello all, I’d like to know the status of OWS or whatever (online multiplayer mods are currently being used) in that I see the info and a little doc in requirements but specifically what is needed to get up and running for a developmental standpoint? For example is a login to http://www.sabredartstudios.com/ still needed to get an api key? And if so where is the sign up page?

I am using 4.27 and also 5 early access for a parallel project
Also what are the actual requirements for running the api server? Can it run on Windows 10 or preferably can it now run on Linux or Mac?

Any help to get up and running would be greatly apprciated