A system and method are directed towards enabling a user to access a client service such as a client game program that interacts with an online service such as a multiplayer game. A client probe detects execution of the client service on a first client device, and sends an instant message with address information to a second client device. A messaging service on the second client device, displays a presence of the first client and provides a selectable button to initiate the client service. If not already installed, the messaging service requests the client service from a remote online service such as a portal that may be independent from the online game service. The remote online service may provide options to freely try, rent, or buy the client service. The second client device downloads the client service and uses the address to connect to the same online multiplayer game.