unifi-client-counter.sh

#!/bin/bash

USER='MYCONTROLLERUSERNAME'
PASS='MYCONTROLLERPASSWORD'
URL='https://127.0.0.1:8443'
SITE='default'

# LOGIN
curl -s $URL'/api/login' -k -X POST \
    -H "Referer: $URL/manage/account/login" \
    -H 'Content-Type: application/json; charset=utf-8' \
    --cookie-jar cookie.txt \
    --data-raw '{"username":"'$USER'","password":"'$PASS'"}' >> /dev/null

# Clients
LIST=$(curl -s $URL'/api/s/'$SITE'/stat/sta/' -k -H "Referer: $URL/manage/account/login" -H 'Content-Type: application/json; charset=utf-8' --cookie cookie.txt)
echo $LIST | jq '.data | length'