XYZ tile server host name

I am a student and I am preparing a scholarly work in which I am using the GeoServer 2.9.1 . I have a problem related to the request made to the GeoServer service because i need to get the URL of the map tile service, because i have to use http://<your XYZ tile server host name>.....//${x}/${y}/${z} to be able to configure the platform(used in the scholarly work) and access to the map on it.

Can you give me indication of how i solve this problem, because i could not even through research how to solve him.

Thank you in advance the care and assistance provided