Somewhat related to my <a href="https://requesthub.xyz/" rel="nofollow">https://requesthub.xyz/</a>, but both face the same problems:<p>- they must ensure high availability if they are to be expected to be used in production system, which is difficult<p>- they must offer some guarantees (or some form of custom domain thing + open-source), because if someone points all his webhooks to an external domain and that stops working in some months nobody will be happy<p>- I pretty much doubt anyone is going to pay for a simple service like this