If you're using Elixir, check out https://github.com/cpursley/walex

I've actually been thinking about turning this idea into a product where you can just point it at your postgres database and select the tables you want to listen to (with filters, like you describe). And have that forwarded to a webhook (with possibility of other protocols like websockets).

I'd love to hear folks thoughts on that (and if it would be something people would pay for). And if anyone might want to partner up on this.