Making a web request without IFTTT?

I wanted to see if there some sort of web app that has been developed that can take a Smart Things action (e.g., a switch being turned on) and based on that make a web request, specifically a Post request with an application/json body.
I know this can be done with IFTTT, but I am trying to avoid the delays associated with IFTTT.

Core can do it. :sunglasses:

See the following thread (this is a clickable link)