Haven't tried this myself, but you can try using the root community and that should work. For example, you should be able to use the /places services to confirm the placeID for the Root Community, it should be 1 in most cases:
Check the output for the id="x" value, and use "x" in your queries.
Note: I'm assuming that when you say "home page" you are meaning the root community. By default, when not passing in a placeID, the system will show all places ... which might also be the same thing. Just giving you the above option in the event it yields different results.
Hope this helps.