The present invention refers to a mediator system for mediating a communication between a client (20) and a plurality of providers (30, 31, 32, 33) within a network, wherein the client (20) provides at least one request message, the mediator system (10) comprising as predefined and callable logical machines a first receiving machine (11) configured to receive the request message from the client, a first sending machine (12) configured to send answer messages back to the client and to create therefrom a request object, a processing machine (13) configured to handle the received request message internally represented as a request object, a second sending machine (14) configured to send outgoing request messages to the providers and a second receiving machine (15) configured to receive incoming answer messages from the providers, wherein the machines can be scheduled separately from being executed such that the request object can be split into a sequence of subrequests where each of those subrequests can be further decomposed in a set of subsubrequests that can be sent out in parallel to the providers (30, 31, 32, 33) where they can be elaborated independently of each other. Furthermore, the present invention refers to an appropriate method for mediating a communication between a client (20) and a plurality of providers (30, 31, 32, 33) within a network.