Mailchimp Integration for the Opt-in Tool

Last updated 04/10/2025

The Mailchimp Integration for Opt-in tool in WordPress allows you to add users to an audience in Mailchimp when they sign up using the Opt-in tool.

Follow these steps if you’re setting up Opt-in tool in WordPress, and need to enter the API Key and Audience ID.

Step 1

Step 2

At the top right, click on your user account icon, then click Profile.

Step 3

Expand Extras, and select API keys.

Step 4

Click Create a Key.

Step 5

Copy and paste the key into the API Key field in the WordPress Opt-in tool page.

Step 6

Next, go back to Mailchimp and click Audience, then All contacts on the left side menu.

Step 7

Select your audience, then go to Settings.
The Audience ID will be in the top section. Copy the Audience ID.

Step 8

Paste the Audience ID into the field in the WordPress Opt-in tool page.

Step 9

Click Save. You're all done! When any user signs up for the Opt-in tool, they'll be added to the audience you specified.

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