It's stupidly simple to use. Simply POST some JSON to the /hipchat endpoint. It wants the following values:

• room - integer - room API ID
• color - string - color for the message. One of: "yellow", "red", "green", "purple", "gray", or "random"
• from - string - the name to send from
• message - string - the message to send to the channel

curl -d '{"room": 100, "color": "green", "from": "FoxBot", "message": "Hello, world!"}' https://example.com:8443/hipchat

1. git clone https://github.com/Snowulf/Web-to-Hipchat
2. cd Web-to-Hipchat
3. npm install.
4. Edit config.js and read the comments. A valid SSL cert IS required; Tasker will refuse to complete the SSL handshake otherwise.
5. Set up the phone to forward to the webapp. Check out tasker.txt and tasker-example.png for setting up the phone to forward.
6. ?
7. Profit