The answer for “how to get the access of payment gateway and accept Visa, MasterCard, American Express and Discover” in simple words is, the business needs to establish a Merchant Account. But, this doesn’t only solution as Merchant Account, is just the service that is provided by the banks that will help to accept the electronic mode of payment. Businesses can choose between the elaborate array of collections banks from across the world have ACH, Check Processing, Credit Card Acceptance, Point of Sale System, etc.