curl --request GET \
  --url https://api.recoupable.com/api/admins/sandboxes \
  --header 'x-api-key: <api-key>'

{
  "accounts": [
    {
      "account_id": "04e3aba9-c130-4fb8-8b92-34e95d43e66b",
      "total_sandboxes": 5,
      "last_created_at": "2026-03-10T12:00:00Z",
      "account_email": "alice@example.com"
    }
  ]
}