@arckhox Hello! I don't know if it is what you are looking for but in REST API doc I founded this: https://github.com/vatesfr/xen-orchestra/blob/master/packages/xo-server/docs/rest-api.md#task-monitoring "A watch mode is available when fetching the collection as NDJSON by using both ndjson and watch query strings. Instead of sending the objects directly, each entry will be an array [event, object]. event can be either remove to mean that an object has been removed from the collection or update to mean that an object has been added to the collection or updated. In case of the remove event, only the id properties of the deleted object is available. The fields and filter parameters are supported."