How to use POST http?

I want to send a http POST to my homeassistant to turn a light on/off when recording. How do I script this with reascript?

I tried looking into an existing webserver option, but as far as I understand reaper doesn't actually send changes, the webremote polls reaper to see the state of buttons/tracks in a user variable rate. I would much rather have reaper send a post to a webhook when I start/stop recording via a shortcut I'm already using.

Has anyone used curl in reascript yet? Should it be possible to send something out from reaper to my homeassistant ip?