To automatically add all the leads that you are going to get from your website with the Pagespeed leads iframe integration, you are going to need a MailerLite API key. Please note that only Agency Plan have the option to connect their MailerLite account.

Step 1:
Go to your MailerLite and log in in: https://app.mailerlite.com/users/login/
If you don’t have an account, you can create one for free here: https://www.mailerlite.com/signup

Step 2:
After you log in, go to your profile (top right corner under your name) and click on Integrations

Step 3:
On your integration page, click on the use button on the Developer API row.

Step 4:
On the Developer API page, copy your API Keys and keep it safely.

Step 5:
Create a group if you don’t have one or you want to create a specific one for PSL. Click on Subscribers on the top left menu then Groups.

and click on Create new group Button.
Give it a name and you are done with MailChimp.

Step 6:
Log into PSL, select Profile and Copy your API key into your Agency profile after you selected MailerLite as an Email Service:

After you entered your key, PSL will automatic called your MailerLite list. From the drop down menu, you can select the list. You can also refresh the list by clicking on the round arrow:

That’s it! You have now configured MailerLite with PageSpeed Leads Application.

If you didn’t have create your Google Insight API key, follow the instruction here: https://pagespeedleads.com/get-your-google-api-key/