NAV and API exports

Hi,

We are programming an inventory tool that uses NAV as one of its main datasources. We are now trying to get the Serial (lots of cisco here) for a given device. In the ipdevinfo overview we see the serial (for stacks there are even the stackmembers with serials listed). My questions is if we there is a way to get this information through the API and if yes how we could retrieve it? My second questions is if there is an easy documented way to extend the API with stuff like that or e.g. Status info like „is the box currently online“? Is there a roadmap towards what should and will be implemented regarding the exporsure through the API (maybe even write stuff?)

Thanks a lot, Mischa