Earlier this month, Google revealed a cloud-based version of Google Wallet, which supports Visa, MasterCard, American Express and Discover.

Today, Google discussed a new way to save cards to Google Wallet, beginning with Discover, the first card issuer to launch an implementation of its new Save To Wallet API for Payment Cards. Google says it is working with other card issuers.

“Discover securely transmits all required information directly to Google Wallet,” says Google Payments Commerce Business Development Manager Frank Young. “You can then select your Discover Card to be the primary method the Google Wallet app will use for in-store purchases, or when shopping online from Google Play or other merchants that accept Google Wallet.”

“You’ll continue to earn rewards on every purchase you make,” he adds. “Discover has also provided Google Wallet with card imagery for the Discover More Card, so you can easily identify your virtual Discover card in your mobile wallet.”

To save a Discover Card to Google Wallet, simply go to discover.com/googlewallet, sign into your Discover account, click “Add Your Card,” sign into your Google account, and you’ll be all set.

Learn about the Save To Wallet APIs here.