service.getsla replace serviceid with hostname....

[bostonmacosx]

the below works ok but I'm looking how to get the hostnames/realnames back from the API and not just a serviceID.
If that is not possible any ideas on how to achieve this are appreciated.

$content4 = '{
	"jsonrpc":"2.0",
	"method":"service.getsla",
	"params":{
		"output":["host"],
		"intervals":
		[
		{"from": "'.$fromtime.'","to":"'.$now.'"}
		] 
	},
	"auth":"2ec8d1a216a4b2e2beed891650b5b966",
	"id":"2"
}';