verifyCard transaction type in sand box

[HorizonXport]

my developers can't seem to get the verifyCard transaction type to work in the sandbox server.

below is what they are seeing and there questions. appreciate and help

TIA

• Issue: Credit card validation request with verifyCard transaction type fails.
• Request Payload Sent:

{
  "createTransactionRequest": {
    "refId": "123456",
    "transactionRequest": {
      "transactionType": "verifyCard",
      "amount": "0",
      "payment": {
        "creditCard": {
          "cardNumber": "5424000000000015",
          "expirationDate": "2025-12",
          "cardCode": "999"
        }
      }
    }
  }
}

• Response Received:

{
  "messages": {
    "resultCode": "Error",
    "message": [
      {
        "code": "E00060",
        "text": "The transaction type is invalid."
      }
    ]
  }
}

• Questions to Authorize.net Support:
1. Is verifyCard a valid transactionType in sandbox or production environments?
2. If not valid, what is the recommended way to validate a card (card number, expiry, CVV) without charging the card or placing a hold?
3. Could they provide a sample valid JSON payload for card verification?