title: What's my GitHub appliance's REST API endpoint?
body: <p>I want to use Groovy, HttpBuilder and REST API to access our company's onsidte GitHub appliance. 
  The GitHub developer's site: <a href="https://developer.github.com/v3/" rel="noreferrer">https://developer.github.com/v3/</a>, shows this URL: <a href="https://api.github.com" rel="noreferrer">https://api.github.com</a>. So if my company's GitHub URL is: <a href="http://github.mycompany.com" rel="noreferrer">http://github.mycompany.com</a>, what is my REST API endpoint URL? e.g. if I want to list all users, what's the correct URL?</p>
  
  <p>When I access this URL: <a href="https://github.mycompany.com/api/v3" rel="noreferrer">https://github.mycompany.com/api/v3</a>, it gives me an error:</p>
  
  <p>github.mycompany.com refused to connect.
  ERR_CONNECTION_REFUSED</p>