Abstract: A platform agnostic financial gateway system and method for managing financial transactions is disclosed. The method includes receiving an onboarding request by a one or more client platforms comprising one or more assets. The method includes processing the received onboarding request to integrate the one or more client platforms with the platform agnostic financial gateway system and determining profile data and configuration data of the one or more client platforms. The method further includes identifying platform-based services based on the profile data and configuration data and determining one or more capabilities of the one or more client platforms to interact with the platform agnostic financial gateway system. The method includes generating and rendering a dynamic screen on a user interface of the one or more client platforms for enabling one or more customers to select, process and manage one or more platform-based services through a one or more payment options.