US Patent 9747621 Widget-based integration of payment gateway functionality into transactional sites

Various embodiments of a payment service are disclosed. In some embodiments, a merchant can enable customer use of the payment service by adding widget code to a web page, such as a catalog or shopping cart page, of the merchant's site. Thereafter, a user can invoke the payment service and complete a purchase transaction directly from the merchant site, without navigating or being redirected to a separate payment service site. In some embodiments, the user can complete the transaction without having or creating an account with the payment service.