script.sh

#!/usr/bin/env nix-shell
#! nix-shell -p jq -i bash

# Usage:
# ./script.sh <server name> <delay>

echo "Monitoring $1 with $2 seconds delay between checks"

while true; do
  date | tr '\n' ' '
  mcstatus "$1" json | jq '.players | map(.name)' -c
  sleep "$2"
done