It's always great to explore application connectivity for the next generation. Webhooks have done a lot for the web, but the lack of standardization is starting to show.

However external deployment of code somehow doesn't feel like an improvement to me. From a DevOps perspective having webtask code run on a closed third party environment is a big risk. It makes continuous integration, testing and error reporting more difficult or even impossible if the webtask service isn't well thought-out.

The way forward for webhooks in my opinion should be standardization of push and pull protocols, with concerns like cryptographic signatures, metadata headers, and failure recovery through event sourcing.