Dirble

//dirble.com/

Dirble.com is another radio station directory, based on user-contributed entries and automatic streaming server polling.

Provides a JSON API, which in v2 is easy to extract from.
List contain even station homepages mostly.
And the channel plugin selects among the available streaming URLs based on format (Ogg, AAC, preferred over MP3) and maximum bitrate.

There's a hidden config option for a custom API key. It's perhaps redundant. Should streamtuner2 -D however reveal an error, you can however configure your own account in settings.json.