title: Alternative http pubsub platform to SNS
body: <p>I tried to use SNS as platform to post http messages to clients, but it have 2 major problems.</p>
  
  <ol>
  <li><p>i can't send the subscribers id's / endpoints dynamically. i must create a topic for every combination, but the combinations change every time according to specific message parameters which change very often.</p></li>
  <li><p>trying to make a work around the 1 issue, i tried to create a service which will generate the topics run-time, but even when i create new topic i need confirmation from the client after adding him to the subscribers considering this happens pretty often i can't expect clients to confirm being added endlessly which creates an issue even so.</p></li>
  </ol>
  
  <p>can anyone suggest alternative service which uses http to publish the messages?</p>