curl "https://your-paneldns-domain.com/api/v1/sub-clients/201/summary" \
  -H "Authorization: Bearer YOUR_TOKEN"

{
  "ok": true,
  "data": {
    "sub_client": {
      "id": 201,
      "org_id": 42,
      "name": "Widgets Co",
      "email": "admin@widgets.co",
      "status": "active",
      "zone_limit": 10,
      "max_records": 100,
      "email_verified_at": null,
      "invited_at": null,
      "created_at": "2026-01-15T08:00:00.000000Z",
      "updated_at": "2026-06-01T10:00:00.000000Z"
    },
    "usage": {
      "zones": 3,
      "records": 24
    },
    "limits": {
      "zones": 10,
      "records": 100
    }
  }
}

{
  "ok": false,
  "error": "Not found.",
  "code": 404
}