While no standard ATM API exists, the ATM Forum is developing an API that enables application developers to use ATM's quality of service and traffic management features. In the meantime, FORE Systems is one the vendors that supply an API library with its line of ATM network adapter cards.
Services such as guaranteed bandwidth reservation, per connection selection of AAL5 or AAL3/4, and multicasting with dynamic addition and deletion of recipients are made available to the application. Applications that use FORE's ATM API bypass inefficiencies and overhead associated with typical TCP/IP protocol stacks.