Transactional facilitator that redirects messages between systems or applications where they are processed. The answers are returned to the source system or application. The services it offers are fundamentally core, such as scalability, competition, resilience, persistence or messaging.

Adds logic and orchestration services, which simplifies the type of information circulating in the system.

Set of high-level services, with channel-associated business models, which simplify the execution of transactions and the design of front and backend solutions.