@echo off
REM status-warn.cmd — tell site1.erralert.com something is degraded.
REM Customise the SUMMARY value to describe what's wrong.
set "SUMMARY=disk free below 20%%"
curl --silent --show-error --max-time 15 -X POST ^
  -H "Content-Type: application/json" ^
  --data-raw "{\"hostname\": \"%COMPUTERNAME%\", \"summary\": \"%SUMMARY%\"}" ^
  "YOUR_URL/warn"