Do you need to check how much credit is available on your AMEX card? You can check the available credit via a new function available in the AMEX portal called “Check Spending Power”.
Login to the American Express portal - https://www.americanexpress.com/australia/
Then on the “My Account” homepage, click the link under the “Current Balance”
Then type a value into the box and click “Submit” to check available funds.