We are launching a for our product, which already functions with OneBox after allowing Iframes from us.
Our oembed endpoint, and an example of the response is here
Now, our concern is first and foremost that we would like thumbnails to appear when the Topic List Thumbnails is active.
It looks like we need to add an integration to lib/onebox/engine.
Regarding the default behavior, which mostly works today, short of not supporting our dynamic embeds. We’d either like to load JS instead of an Iframe, or an Iframe with some additional and optional JS.
I am aware of Using onebox images for topic thumbnails - #20 by david