Amazon Pay Express is one of the most popular online payment processing services for E-commerce uses on websites. Built on Amazon Pay but without needing a complete E-commerce integration. It utilises a Java button code generator to produce a button that can be copied and stuck onto a website or attached via WordPress Plug-in. It is pretty suited for retailers trading a modest number of products and with a separate item in each order, such as a digital download.
CBA was an E-commerce method that allowed web retailers to accept Amazon account information and utilise Amazon for payment processing. CBA could handle several features of the transaction including order processing, shipping rates, promotional discounts, sales tax calculation, and up-selling.
FPS was an Amazon Web Service that authorised the transfer of money within two entities using a technology based on single, multiple, and unlimited use of payment tokens. Retailers maintained their use of the service via API or solution providers and accessed the account through the merchant account on the Amazon Payments website.