1. Get your MailChimp API key. Login to MailChimp or signup for a Free account.
2. Navigate to your Accounts page from the User menu at the top right.
3. Navigate to Extras > API keys.
   

   

4. Click "Create a Key" button.
5. After the key is created, copy the new API key in memory.
   

   

6. Login to your Website Portal.
7. Navigate to Marketing > Email Marketing > Setting tab
8. Paste your API key into the MailChimp API key field.