How to integrate Mailchimp with Eventdex? Created November 24, 2015 Author support Category Mail Chimp Integrate Mailchimp with Eventdex: Mail Chimp Instructions Get your Mail Chimp API Key 1. Sign in to your MailChimp account, or Sign up for a new MailChimp account. 2. Create a new list in MailChimp. 3. Copy your API Key from MailChimp.