https://forums.developer.amazon.com/questions/68355/regardin...
Upon research, there's a few tools like https://readwise.io/ and clipping.io which are chrome extensions.
They webscrape your homepage highlights here:
https://read.amazon.com/notebook
https://read.amazon.com/kp/notebook?ft
Readwise is like evernote for kindle highlights. It sends 10 or so highlights as a daily message email.