Casinos that accept American Express, tested by Velatonmies
No casinos listed with this method yet.
American Express at casinos: rarely accepted, rarely a payout route
American Express is far less common at online casinos than Visa or Mastercard. Amex's own merchant terms and higher processing costs mean many operators simply do not offer it, and where it is accepted the experience is usually deposit-only.
Deposits
Instant where supported. Amex's fraud controls are strict and gambling transactions are among the more likely to be declined, so an initial refusal is common and is a decision by Amex rather than the casino.
Withdrawals
Seldom supported. Operators generally cannot push a payout back to an Amex card, so you will be routed to a bank transfer, supplying account details at cashout with the fuller verification that usually accompanies it.
The credit issue
Most Amex products are credit rather than debit, which brings the cash-advance question into play, fees and interest from the transaction date, and outright prohibition in markets such as the UK where credit card gambling deposits are banned.
Alternatives
Almost anything else is a better fit. Open banking for speed both ways, a debit card for universality. See which operators above accept what, with the withdrawal times we measured.