HipChat's API (https://www.hipchat.com/docs/apiv2) is quite extensive and satisfies most organization's needs. To give you an idea of what can be done, you could also look at the HipChat add-ons in our Marketplace (https://marketplace.atlassian.com/plugins/app/hipchat/popular).
...have mention name FirstnameLastname. Fe.: @MaartenCautreels This certainly helps to know who is being mentioned in a conversation. Imagine your colleague sends the following message...
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