Providing temporary use of online non-downloadable middleware for providing an interface between restaurant order management software and third-party online food ordering and delivery software applications; Software as a service (SAAS) services featuring software for transmitting restaurant orders from third-party online food ordering and delivery platforms to restaurant order management software; Software as a service (SAAS) services featuring software for publishing and synchronizing restaurant menus, menu prices, menu item availability, and restaurant operating hours on third-party online food ordering and delivery platforms; none of the foregoing for processing payments, executing financial transactions, or processing cryptocurrency payments