As in, I can run a curl command with an API key and generate an imessage ?
How can I throw money at this today ?
EDIT: OK, I understand that the same restrictions are extant that always have been - namely, an Apple device needs to be involved in creating the actual imessage. So this is not the breakthrough service I thought it might be.
As Beeper is based on Matrix, you can use the standard Matrix API, use libraries like Maubot, and plenty of others in other programming languages. HTTP calls are one way to send/receive messages but there's more flexibility to be gained if you pick a wrapper library IMO.
Disappointing, but iMessage has always been Apple's special little protocol nobody else can use.
Still, there are Docker images out there (that break the TOS) for running macOS inside QEMU, I'm sure someone can script one of those to set up a bridge more easily?