Transferring events. A method may be practiced in a network environment including one or more interconnected systems. The method includes subscribing to receive an event stream from a sending system. Subscribing to receive an event stream includes sending a bookmark subscription. The bookmark subscription specifies events that should be sent from the sending system. The method further includes receiving an event from the sending system as dictated by the bookmark subscription. The method also includes receiving a bookmark from the sending system related to the events sent from the sending system