Over the past year, American Express has been making several key payments partnerships with technology companies and launched its take on the digital wallet, Serve. Serve integrates a variety of payment options into a single account that can be funded from a bank account, debit, credit or charge card. The company has also landed a number of lucrative carrier partner deals for Serve.

American Express To Release An API For Digital Wallet Platform Serve; Focuses On Data And Personalization | TechCrunch.