curl --request GET \
  --url https://api.kit.com/v4/broadcasts/{broadcast_id}/stats \
  --header 'X-Kit-Api-Key: <api-key>'

{
  "broadcast": {
    "id": 2761,
    "stats": {
      "recipients": 0,
      "open_rate": 0,
      "emails_opened": 0,
      "click_rate": 0,
      "unsubscribe_rate": 0,
      "unsubscribes": 0,
      "total_clicks": 0,
      "show_total_clicks": false,
      "status": "draft",
      "progress": 0,
      "open_tracking_disabled": false,
      "click_tracking_disabled": false
    }
  }
}