Hi Tobias,
thank you for your reply.
I found the widget right for Discourse. But we need the widget on our external domain.
Explain
We run a SaaS and we want to add instant Help using a floating widget. The user clicks on the widget and the help links /articles are displayed. Like here Develop custom experiences with the Zendesk Platform | Zendesk Sunshine You can see animation how it should works.
(This is a common way of displaying help in SaaS projects.)
The KnowledgeBase we want to make by Discourse Docs. Like this Documentation - Discourse Meta
So we are looking for a solution for the widget that can display relevant results from our Discourse Docs KB.