American Express credit card is as easy to set up as Amex login. Head over to the sanctioned website for American Express credit card login. It will directly open a login runner Account” button to open a new runner for setting up your card. You can upgrade from the Amex Green card to the Amex Gold card. Still I recommend If you're in the service, you can also open another Amex Green so you still have all the benefits of Amex Green card class.