Question for api.

[Ludaking]

Hello, 

Just i have a question and one problem, the problem is 

Code:

root@panel:~# service bind9 start
* Starting domain name service... bind9
/usr/sbin/named: error while loading shared libraries: liblwres.so.90: cannot open shared object file: Permission denied [fail]
root@panel:~# 

And the question about api, how does sentora api works? is there a way to use directly api with other billing platforms or is needed to install xbilling module, if yes where is api code and the url where can i send api requests?
or xbilling is just like a billing platform?

with easy words. i just need to know how can i use sentora api, can someone help about this?

Thanks