Oooh, so api.pstatus.dev isn’t a real API, gotcha, that put me on a wrong path…
I’ve wrote a short guide on api.tracker.gg: Warzone custom API command - #11 by EmilyPerrimon
However, I think this part specifically will interest you more: Warzone custom API command - #13 by EmilyPerrimon
It’s not a perfect command as I didn’t include error handling, but it’s not difficult to add.