@echo off
REM status-crit.cmd — tell site1.erralert.com something is broken.
REM Customise the SUMMARY value to describe what failed.
set "SUMMARY=backup script failed at last run"
curl --silent --show-error --max-time 15 -X POST ^
  -H "Content-Type: application/json" ^
  --data-raw "{\"hostname\": \"%COMPUTERNAME%\", \"summary\": \"%SUMMARY%\"}" ^
  "YOUR_URL/crit"