Ingresso TicketSwitch API provides a way for users to search events, view availability including individual seats, reserve and purchase tickets. The API service is connected directly with venue ticketing systems. Any tickets bought via the API are purchased live on the venue's system. Developers can integrate their application with the API, enabling their users to purchase tickets directly from the application. This API is used by large ticketing sites such as Amazon Tickets (tickets.amazon.co.uk), YPlan (yplanapp.com) and From The Box Office (fromtheboxoffice.com). Ingresso is a global distribution system for entertainment tickets.