automate getting info from RAX200?

Does anyone have a script to automate connecting to a RAX200 to obtain status information (like what IP address the ISP assigned me)? I want to do this from cron on my linux box. An ancient netgear router I had let me use curl with the -u option for user:password, but the new nighthawk interface isn't happy with that. (I'd rather not badger an external service for the info if I can help it).