World images are not available via my API as well. They are part of the main List/Retrieve World API endpoint. For example, if you want the image for Serp, you can got to https://api.boundlexx.app/api/v1/worlds/10/?format=api and grab the
image_url property for the image URL (https://cdn.boundlexx.app/worlds/serpensarindi.png)
All of them should be in the pattern
<world_name> is the lower cased name of the world with spaces replaced with _.
EDIT: Looks like Azure is having trouble deploying the CDN SSL Cert. It was working, but now it is broken. It says it takes up to 8 hours for the SSL Cert to propagate, so I will keep an eye on it and get it working.