@akhromieiev absolutely! I have built many bots using Cloud Functions as webhook handlers including the famous@google-oss-bot (source:https://github.com/firebase/oss-bot)

All best practices about general webhook development still apply. HTTP functions are public so you need to make the incoming request is real (GitHub uses a secret token) before handling it.

Also for developing webhooks locally in the Cloud Functions emulator, check outhttps://smee.io/ which is a great tool.