Trying to connect changedetection.io to Keyboard Maestro; I could use some assistance

[seannymurrs]

I'm currently using changedetection.io to monitor a handful of TestFlight betas for open spots. I'm trying to set up a connection between my changedetection.io installation and Keyboard Maestro running on my Mac. Ideally, I want a change to the monitored site to trigger a macro on Keyboard Maestro that will automatically follow the URL and join the TestFlight beta. Keyboard Maestro macros can be triggered via a remote trigger URL. For my idea to work, I need the remote trigger URL to also contain the watched URL as well as the changed text (I need the macro to see whether the word "join" was added to the changed text). This URL is an https:// url which doesn't seem to work with changedetection.io. I've tried switching it to get:// with limited success, but it isn't consistently working. I've been going at this through trial and error for a few days now, and I decided it might be worth posting something here to see if anyone could help me figure this out.