I tried to publish multiple reports at the same time using both the Jaspersoft Studio and the web interface of Jaspersoft Server. However, this doesn't seem to be supported. I then looked at the REST v2 API and the repository service allows you to create, modify and delete resources on the server. Therefore, although publishing multiple reports at the same time isn't supported out of the box, using the REST calls you can create your own publisher to do so :)