title: Right way to implement calling a callback URL in Azure
body: <p>If I have an API-only app in Azure App Service where users can send a callback URL in the request. The app sends a POST request to the callback URL upon completion.</p>
  
  <p>There are some complexities in implementing calling a callback URL, for example: retries, time between retries, etc.</p>
  
  <p><strong>Is there a service, or set of services, in Azure that can help me implement a callback URL?</strong> For example, in AWS the Simple Notification Service (SNS) allows me to send a "push" to a HTTPS endpoint with retries, etc.</p>