Update: It's been fixed now.

@david, thank you.

I can see the list of commands. Once, I have found a command that I'm interested in, how do I query the syntax of said command?

EDIT: I found I can use getMethodTypes (v1.0) with params of just "" to query each library (i.e. "http://{ipaddress}:10000/sony/avContent","http://{ipaddress}:10000/sony/system", etc).