title: 503 Service Unavailable: Invalid webhook response status?
body: <p>I have a Parse.com webhook set to call my <code>new_transaction</code> method in my Rails application:</p>
  
  <pre><code>def new_transaction
    result = Braintree::Transaction.sale(
      :customer_id =&gt; params[:customer_id],
      :amount =&gt; params[:amount],
      :options =&gt; {
        :submit_for_settlement =&gt; false
      }
    )
  
    if result.success?
      return render :json =&gt; { :success =&gt; "The payment was successful!" }
    else
      return render :json =&gt; { :error =&gt; "Something went wrong." }
  end
  </code></pre>
  
  <p>However, when this is ran, I keep getting a response of</p>
  
  <pre><code>{
    "code": 143,
    "error": "Invalid webhook response status: 503 Service Unavailable"
  }
  </code></pre>
  
  <p>Not sure what exactly this means or why its being called. </p>