The first thing you would require to become a payment gateway or a payment service provider is a fully-functional operating software. This will allow the credit and debit card information to flow securely to the banking system. Once a payment request is validated, the correct response is securely sent back to the e-commerce website, i.e. the merchant website. Security is of paramount importance. Sensitive information such as passwords and credit card numbers etc. are vulnerable to cyber attacks. You cannot really compromise on the security of your systems. Bear in mind that only banks have the ability to process credit and debit card payments. If you want to start a payment gateway, you need to contact a local bank. You need to get an API from your banking partner to activate your services. You cannot get an API unless the bank is confident about the security of your website. In a word, to become a payment service provider, you need two things: (1) A high-end and fully secure system and a banking partner. If you need an expert team for consultation, please feel free to contact us.