Scheduled items in RSS feed with html template?

I would like a team to have access to a weekly roundup of visitor stats for a website by having a graph posted to a HipChat group room (or similar) every monday morning. It would be simple to do this is if it as possible to configure and generate an RSS feed that was updated once a week. Most group chat systems can subscribe to a RSS feed and make it update a room.

Ideally I would like to configure a small HTML template for each RSS item, point to some API parameters and set the update schedule (daily, weekly etc).

Would this require a new plugin or is there similar functionality already?