Amex Serve is prepaid American Express card that is great to start a relationship with American Express.
Serve links that are hidden (not provided anywhere on Amex site, but works well and useful for many important tasks)
Link to add extra credit card
https://secure.serve.com/Profile/Cards/AddCredit
https://secure.serve.com/Profile/Cards/AddCredit
Link to schedule extra auto reload
https://secure.serve.com/Account/ScheduleAutoAdd