To integrate MailChimp with ThinkCoach, 

1) Go to Integrations >> Autoresponder Integration

2) Click on the arrow  as shown in the image below. 

3) Enter the API token in the provided field and then click on Save button.

4) Now the MailChimp account is integrated with the tool.

Once it is integrated, then the button will be changed to Connected

Follow the steps to get the API from MailChimp

Copy the API key from the API keys section and paste it .

To link the Autoresponder list to a Campaign

1) Go to a Campaign and click on Actions as shown in the image below

2) Then click on Autoresponder

Choose MailChimp from the list (under API integrations) and then the list to which you want to send the registered customers.

3) Then click on the Save button. The autoresponder is linked to your Campaign now.