Unfortunately not at this time - the Atlas Merchant Platform only supports Visa and Mastercard credit cards.

Supported card types: 

Amex and Discover not supported - No, not at this time. Only United States-issued Visa and Mastercard credit cards are eligible for use in Atlas Reality's Atlas Merchant Platform
Visa and Mastercard only - These are the only two card networks currently integrated with our system
US-issued requirement - Cards must be issued by a United States bank or financial institution

Why the limitation: 

Technical integration - Different card networks require separate technical integrations
Market focus - Visa and Mastercard represent the vast majority of US credit card usage
Partnership agreements - Each card network has different merchant platform requirements

What about the future: 

Possible expansion - We may add support for additional card networks as the platform grows
No timeline - Currently no announced plans for Amex or Discover integration
Player feedback - User demand helps inform our platform development priorities

Your options: 

Use a Visa/Mastercard - Connect a US-issued Visa or Mastercard instead
Check your wallet - Many people have multiple cards from different networks
Still earn Atlas Bucks - Remember, there are many other ways to earn AB beyond merchant rewards

Pro tip: Most US banks issue both Visa and Mastercard options - check if you have an alternative card in your wallet that would work with the merchant platform!