Finding your MailChimp API key

1. Click on your account icon on the bottom right of the MailChimp Dashboard.
2. Select Account from the drop-down menu.
3. Click on the Extras menu.
4. Choose API keys from the drop-down menu.
5. If you don't have any API keys click 'Create a Key' 

MailChimp API keys are found under your Account > Extras > API Keys.