Check webpage/API continuously for availability

check_api.sh

#!/bin/bash

# Keep calling some API every second and check that it's working (status 200).
# If any other HTTP status is received print an error.
#
# Useful for observing server downtime and such.

while true
do
  status="$(curl -sL -w '%{http_code}' https://api.com/something -o /dev/null)"
  if [ "200" != "$status" ]
    then echo "FAILED with "$status
  fi
  sleep 1
done