literally can't wait for your beta guys. For me, as a network operator for WISP, would be very helpful to dig out data about all signals (tx, rx, snr, noise floor, ...), quality, modulation, link uptime, gps sync, mac, etc. Plus information about board - serial number, type (model), firmware version, interface stats, cpu load, ram, free hdd, bad_blocks, device uptime.
I believe someone will appreciate billing info like downloaded/uploaded data, current throughput ...
We have WISP network where is mixture of all vendors. To have everything "under one roof" I created simple monitoring system which puls data (in my case every 2 min) from all devices in the network (using api or snmp) and save them to db. As backend, there is a web app, where you can see all usernames (radius) with all necessary information (data usage [hours/days/years], signal levels per clients or backbone links with zooming graphs for the last week or year characteristic by daily average, drops [drop on wifi or power reboot of cpe], activated/deactivated ports on the switch or router, new connected clients, tx/rx errors on interfaces, performance of each device, information about ap [change of frequency, protocol, channel-width, etc], avaiable capacity per ptp/ptmp link with possibily to "scroll back" to see what was happening last nigh and so on :-)
I found out all these things make very easy to manage and most impotantly to predict any future anomalies.
All the best with your API!