Why not try the API from Kano documentation?
Here's the link:
https://github.com/kanoi/cgminer/blob/master/API-READMETake note: newer units have restricted API access, and I think only the statistic API would work. If you are looking beyond that API, you might need to switch to another custom firmware to get a privileged API.
If your purpose is to monitor your unit and you have 1 or 2 units try awesomeminer.