Services Module + Rest Server Module + custom service method doesn't work

I've spent the last three days reading every piece of documentation, every forum post, everything and can't seem to find an answer.

I have the services module installed along with the rest server module and the xml-rcp server module. I've created a new service method (example.all) via hook_service in a custom module and the service does show up via /admin/build/services. I am able to test the new method and it does return the correct data.

My question, how do access this service via the rest server?

i've tried:
http://example.com/services/rest/example.all
http://example.com/services/rest/example/all
http://example.com/services/rest/?method=example.all

nothing works. i've tried accessing example.all method via xml-rpc and it works correctly. Am i missing something? are services not available through the rest server, only resources?

Thanks in advance.