how to install service by API or by other auto way

[#1]

in my Ambari cluster we have some services that not installed yet

as graphite service as described here ( in the picture )

what are the API commands that required in order to identify which service is/are available to install

and the API that install the service

[#2]

@Michael Bronson,

Yes. You need to add the service -> install the service and start the service. If you do it from Ambari , it will take care of all these after "Configure services" step