Whoxy Pull Domains

#!/bin/bash

email="$1"
key=""

if [[ -z "$email" ]]; then
        echo "No email supplied"
        exit 1
fi

current_page=1
total_pages=10

mkdir -p output
until [[ "$total_pages" -eq "$page" ]];
do
        res=$(curl -s "https://api.whoxy.com/?key=$key&reverse=whois&email=$email&page=$current_page" | tee output/$current_page.json)
        total_pages=$(echo $res | jq -r '.total_pages')
        current_page=$(echo $res | jq -r '.current_page')

        echo "$current_page / $total_pages"
        current_page=$((current_page+1))
done

cat output/* | jq -r '.search_result[]?.domain_name' | anew output.json