A negotiation method and server are provided for delivery of a service to a terminal. Also provided are a method for configuring a terminal and a terminal using the method. In particular, the methods and apparatus relate to interfaces for interaction with services available to users of a service. The negotiation method includes sending to the terminal of a set of proposals for interactions with a delivery component of the service capable of enabling the terminal to indicate to the delivery component that the terminal accepts at least one proposal from the set of interaction proposals.