Filter by audience type: intents, contact, list, or pixel. elixir is the former name for contact and is still accepted here; either value returns every contact audience, including ones created before the rename.

Filter by segmentation type: Persona, Account, or Audience.

Filter by status.

Search by audience name (case-insensitive partial match).

Sort by field: name, status, created_at, updated_at, size, or last_downloaded_at.

An unrecognized field is refused with 400 rather than ignored, so a misspelling is answered instead of silently returning the default order.

Sort order: asc or desc. Ascending when sort_by is given without it.

Requires sort_by. Sent on its own it is refused with 400, because the ordering used when no field is named is not a single column that a direction could be applied to: unpaused audiences come first, then most recently updated. Omit both to get that ordering.

Deliberately has no default for that reason. A client that filled one in would send it alone on an unsorted request and be refused.