title: Is it possible to do a webhook to existing Firebase endpoint?
body: <p>I was wondering if it was possible on Firebase to let a third party service do a POST request to my database and to my endpoint? eg. <code>/broadcasts/</code></p>
  
  <p>The post request can't have auth on write as part of the restrictions from the third party service. </p>
  
  <p>Is this possible? If so, how can I achieve this in Firebase?</p>