Definitely +1 for the auto-publish feature. Hope that's coming soon!
Incidentally, @SidneyOttelohe, Zapier usually exposes the payload that's being sent around, whether sent or received. If you can't find it, though, try setting up a RequestBin:
You can create a unique URL for webhooks that expires after 48 hours. Just use this as a POST endpoint for whatever data you're inspecting and it will show you exactly what you're looking at. Saved my bacon a few times when trying to get a Cognito form to play nice with my client's API...
Also, since Zapier doesn't return error messages, you might try Postman:
There's a bit of a learning curve but you can test JSON schemas by POSTing them to whatever endpoint before setting up your zap. It will return errors -- such as fields that are required or mis-typed -- that Zapier doesn't reveal. Again, I was having a devil of a time with a client API because Zapier wasn't telling me what was failing, but Postman does! In fact, I think I might fire up a new topic for how I'm using Postman to test out the Webflow API...