If you’re polling, you can use GitHub APIs. They are pretty well documented. If you want a turn-key solution, use gitea. Depending on how flexible you need it,

If you’re polling, you can use GitHub APIs. They are pretty well documented. If you want a turn-key solution, use gitea. Depending on how flexible you need it, gitea might cover your scenarios. But you can have actions in gitea as well that automate polling GitHub APIs for issues or comments or pull requests etc.