Abstract: A messaging service is disclosed that provides access to data center event data for physical infrastructure assets via dynamically configurable custom tags defined by customers. For example, a network services exchange provider or co-location provider deploys a data center monitoring system that monitors physical infrastructure assets that enable system operation within a data center for events. The system implements an API which applies custom tags defined by customers to the assets, wherein each custom tag defines attributes of the assets. The system receives subscription requests that describe events and custom tags applied to the assets. The data center infrastructure monitoring system publishes a subscription of event data related to the events for the assets to which the custom tags are applied. Further, a feed manager receives updates to asset equipment and changes to metadata describing the assets and automatically updates the subscription to account for the changes.