You will almost always need to complete a Know Your Customer (KYC) check, which involves providing a photo of your ID.
Try linking your Amex Serve card as a debit card in the Cash App settings. If accepted, you can use those funds to buy Bitcoin directly within the app.
This is the most reliable method for using an Amex Serve card. You aren't buying from the exchange itself, but from a private seller who accepts Serve transfers.
Cash App is one of the few platforms that occasionally allows linking certain prepaid cards, though it is hit-or-miss with Amex Serve.
Buying Bitcoin directly with an prepaid card is tricky because major exchanges like Coinbase and CEX.IO generally do not support American Express or prepaid cards for direct crypto purchases.
Search for sellers who accept "American Express Serve" or "Amex Serve to Serve" transfers.
The BitPay app allows you to buy crypto via third-party partners like MoonPay or Simplex. While they rarely accept Amex prepaid cards directly, you can sometimes use them through or Google Pay if those wallets accept your Amex Serve card. Key Things to Watch Out For: