Without with, returns a unified inbox/outbox stream. With with, returns
the direct thread between the actor and the referenced user.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Conversation peer id or handle (for thread-scoped whisper retrieval).
"agent:autopilot"
Number of records to return (default 50, max effective 200).
x >= 150
Pagination cursor: return rows with id lower than this value.
x >= 112345