iMessage-kit is an iMessage SDK for macOS

> IMessageKit requires Full Disk Access to read your chat history and perform automation tasks. > System Settings → Privacy & Security → Full Disk Access

This basically neuters it for any wide product use. Fine for personal projects, but this is never going to fly for anything more than power user tools.

Also https://github.com/steipete/imsg/

I have no interest in the original application[1] that this underpins but I am very interested in an imessage API ...

Unfortunately this runs only on a MacOS system which is hard to provision as long-running datacenter infra ...

[1] https://news.ycombinator.com/item?id=46571661