Google

Pastebin

Open a spreadsheet and click on Extensions > Apps Script

Go to https://pastebin.com/raw/QD1MPpTv and copy/paste the script in Code.gs

<p>If you don't have a key yet you can create one at&nbsp;<a target="_blank" rel="noopener noreferrer nofollow" class="cursor-pointer" href="https://app.findymail.com/user/api-tokens">https://app.findymail.com/user/api-tokens</a></p>

Replace "APIKEY" by your Findymail API key

Click on Save project

<p>The parameter is the email address</p>