Is there any way to get a list of users for a custom audience?

Question

Getting other details is easy, but there doesn\'t seem to be any API accessible way to get a list of users (or even approximate users) for the audience. You can add them, a

Answer 1

For the audiences you never upload raw contact data. You always have to hash it via SHA256 and send the feed to Facebook that way. Since you have not provided the actual contact information like email, phone number facebook won't give those back to you it would be an information breach in a way.

If what you are asking is whether you can retrieve back the hashes that you have sent, I have not been able to find a way it on the API so I assume they think that you already have that list since you uploaded it in the first place.

https://developers.facebook.com/docs/marketing-api/audiences-api/