This pattern is a slight variation of the aggregator. In this case, the client is not involved in the aggregation activity. Based on business needs, different microservices can be invoked. The proxy pattern can scale independently on x axis and z axis as well. The idea is that each microservice need not be exposed to the consumer. The proxy may be a dumb proxy, in which case it just delegates the request to one of the services. Alternatively, it may be a smart proxy where some data transformation is applied before the response is served to the client. With the explosion of different IoT and I/O devices, this proxy pattern is a beneficial one.