This functionality isn't built into HipChat, however you may be able to do programmatically using our HipChat API v2: https://www.hipchat.com/docs/apiv2 (available for both HipChat Cloud and Server) by invoking the Send Message method: https://www.hipchat.com/docs/apiv2/method/send_message
Be sure you understand that if you send a message this way, the 'from' entity will be whomever generated the v2 token. If this is a problem, you can use the Send Room Notification method: https://www.hipchat.com/docs/apiv2/method/send_room_notification instead which allows you to dictate the 'from' user.
Hope this helps!
HipChat Server Support Engineer | Atlassian
Earlier this year we made the difficult decision to discontinue our team messaging tools, Stride and Hipchat. The end of life date for Stride and Hipchat Cloud is quickly approaching - February 15, 2...
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