HipChat is definitely meant to be a standalone application, not as a backend service to be used by other 3rd party / external sites. The APIs are available to allow integrations between HipChat and other services, but aren't meant to supply the full backend chat system for other services.
...from the beginning. We have built up a lot of content in HipChat, with it being a core tool in our distributed company model. While it is true that we didn’t need to move to Slack immediately, we felt it...
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