Is there an API of some kind?

I have just bought two U2Steam S10s and am very happy with them. Unfortunately I can’t control the devices properly from my Linux computer and am thinking of writing a widget for controlling them or something similar. Is there an API? This url seems to be dead Arylic Audio HTTP API

For me this URL worked just fine. Arylic Audio HTTP API lead me to just a normal website listing and explaining all the API codes. I opened it in chrome on a windows Laptop. Have you tried it on a different PC?