I would like show Artwork picture on my radio app. But where I found metadata link, which contains an Artwork image? Icecast server show only song title, but not Artwork.
You need to fetch the track ID from the API
You will then receive a JSON response, in that JSON response, you should find the track ID:
.current.metadata.id. (There is also a artwork_url field, but it is unusable out of the box).
With that ID you can then get the artwork if there is one using the following URL: