That makes sense. To accomplish such goal, the simplest solution is to enable the internal Web server of Lightstreamer and deploy a page of your choice.

To enable the Web server:
--> edit lightstreamer_conf.xml: <web_server> <enabled>Y</enabled> ...

To deploy a custom page:
--> copy your page in the "pages" directory

The monitoring software will directly access the deployed page to check Server's health.