is there a way to create a url for user tickets which prefill some fields (e.g. title, tags) to publish this urls for special purposes in documents, intranet or something else?
There’s no way in Zammad to use special URLs for ticket creation based on GET-Requests.
To do so you’d need to have your own script base that takes those GET parameters and fires an API call to Zammad to create the ticket. That’s your only option.