It looks like you will be able to get a full list of the sources and the breakers associated with them via the api.

It is a great question. Let me see if I can validate that is true

oh ok never done that

If you head over to the api docs page on the leader node (http(s)://<leadernode>//global-settings/apidocs). At the top of that page, choose the worker group you want to use from the Servers drop down, and then scroll down to the "Inputs" section. From there if you expand the "GET /systems/input" and click the execute button. The response will show up on the page. If you look through that data, you will find a key call "breakerRulesets"