Monitor a JSON file for track information and when it changes scrobble the track to Last.FM.
This was built originally as a companion for Supbox, but it will work with any JSON file as long as it has an artist and track key.
For example Supbox renders the following nowplaying.json file:
{"ID":"6d655f64-f2e5-4ec9-bd51-3a2c86984c8e","artist":"VNV Nation","track":"Retaliate","imagePath":"/Users/gabek/Library/Pioneer/rekordbox/share/PIONEER/Artwork/bd3/82718-334f-482d-ad0a-82a1f8ba2507/artwork.jpg"}
So point json-scrobbler at that file in the config/config.yaml and run.
You'll have to create your own set of Last.FM authentication keys, but that's easy enough. Just go to https://www.last.fm/api/account/create, fill out the form (Put some dummy value as Callback URL) and then put the resulting key and secret into the config.yaml file.
Put your Last.FM username and password in the config.yaml file to enable authenticating yourself for scrobbling.