Maybe [1]? Sounds like ntfy.sh, but more… AI

[1] https://poke.com/docs/developers/api/message-poke

How'd you find this? I spent 5 minutes bouncing between their various domains and marketing videos and login walls and couldn't find the developer docs.

Personally, I'd setup a Mattermost server and use its WebHooks for notifications. That's also more flexible (can send commands back to the bot, etc.)