An API would allow programmers to write client apps which could interface with the RHP server. I'm not sure but I think only a small set of such services is currently supported by RHP.
Originally posted by Eladar Why would that be helpful?
I'm not sure what georgiecasey had in mind, but with a complete API, it may become easier to write automated clients that do all the playing without any human intervention. Don't ask me why... 🙂