get https://api.baremetrics.com/v1/sources
Each Plan, Customer, Subscription and Charge belongs to a source. A source can be your Payment Provider or the Baremetrics API.
When you want to interact with any of these objects, you must supply the Source in the URL. For example: GET /v1/:source_id/subscriptions
You can get your source_id from the Sources endpoint
Please note that while you can read data from your Payment Provider sources, you can only modify data that has been added via the API.