As a developer & maintainer of a HIBP package / library, keeping it up to date currently requires constantly checking the API documentation in its entirety to discover any changes. This isn't always obvious and inefficient.

I would like to see either a mailing list that developers can subscribe to, or some other kind of notification (at minimal, at least a public changelog that can be read, but preferably something that would alert to the fact that changes have been made) that can be easily parsed to determine:

1. If there have been any changes to the API
2. What those changes are