API or WebHooks on Docker Hub events

I would like to perform some actions when one of our private docker repos gets updated with new images or new tags. Is there any API or WebHooks that one could connect to?

I know this exists, but it looks like it is only applicable if using the automated build functionality. We build the images our self. https://docs.docker.com/docker-hub/webhooks/.

An alternative is that we would create our own webhook from our build process when the image has been created. However, that would mean that manually pushed images would not be handeled.

I am using IFTTT for performing hosting free actions supporting mails, wordpress, social accounts etc.
It also supports webhooks.
Please get more information at https://ifttt.com/
Its an acronym for If This Then That.