curl --request GET \
  --url https://your-instance.example.com/api/campaigns/scheduled \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "data": [
    {
      "_id": "665f1a0c0e0a4b001a2c9f20",
      "message": "Hi Jamie, just following up on our chat.",
      "scheduleDate": "2026-05-19T14:30:00.000Z",
      "contactId": "665f1a0c0e0a4b001a2c9f01",
      "status": "scheduled"
    }
  ]
}