How can you find the ID value of a custom field group?

Using the "retrieve a list of field groups" endpoint is the most direct and efficient method to find the ID value of a custom field group. This endpoint allows users to programmatically access details about existing field groups associated with their Adobe Experience Platform instance. When this endpoint is called, it typically returns a structured list of field groups along with their relevant ID values and metadata. This means that you can directly obtain the ID you are looking for without having to parse through extensive documentation or other settings.

Consulting the API documentation can provide valuable information on how to use various endpoints and understand their parameters, but it won't give you the ID directly; it serves more as a guide for implementation. Similarly, examining the schema response is useful for understanding the structure and types of data, but it won't necessarily yield the custom field group's ID. Reviewing sandbox settings might help in certain configurations, but it is not designed to provide details about specific field groups or their IDs. Thus, utilizing the endpoint for retrieving a list of field groups gives you the clearest and most immediate path to acquiring the required ID.