This is a quick setup to receive server side events from matroid with nodered.

https://app.matroid.com/docs/api/index.html#api-Streams-WatchMonitoring
First install this node
https://flows.nodered.org/node/@tq-bit/node-red-contrib-server-sent-events

Add the sse-client to your flow

Then configure the node

Configure the header json like this

There you go!