This article assumes you've got Admin access to your MailChimp account. If you don't have Admin access, please get it before continuing.
In MailChimp, navigate to your Account settings. Once you're here click Extras and then API Keys.
Once you're on the API key page, click Create a Key. Copy this key and save it for the next step.
Navigate to Settings on the Permutive dashboard, then click the Integrations tab.
From here, click + Add Integration then select MailChimp. You'll need the API key you generated before to complete setup.
Click Add MailChimp and you're done!