Mailchimp Integration Setup Guide

Last Update: August 14, 2026

This guide walks you through the steps required to connect Mailchimp Transactional with the plugin. You’ll learn how to create a Mailchimp Transactional account, generate an API key, find your Audience ID, and locate the merge fields and audience tags needed for configuration.

Mailchimp Essential

Create a Mailchimp Transactional Account

If you don’t already have a Mailchimp Transactional account, create one before using the API.

Generate an API Key

The Mailchimp Transactional API uses an API key to authenticate requests.

To generate an API key:

Go to Settings → API Keys.

Click Create New Key.

Enter a descriptive name for the key.

Copy the generated API key and store it in a secure location.

Note: The API key is displayed only once. After you leave the page, you won’t be able to view or copy it again.

Find Your Audience ID

To locate your Audience ID:

Go to Audience.

If you have multiple audiences, select the audience you want to use from the Audience drop-down menu.

Click More options → Audience settings.

In the settings table, locate Audience ID.

Click the Copy icon to copy the Audience ID to your clipboard.

Find Merge Field Names

Go to: Audience → Settings → Audience fields and |MERGE|tags

Here you can view the merge field names (merge tags) for your audience, such as FNAME, LNAME, and any custom fields.

View Audience Tags

Go to:

Audience → All contacts → Tags

This page displays all tags associated with your audience and allows you to create and manage them.

Gutenverse Form Mailchimp Setup

You can configure these settings either in the Form Action or globally in the integration settings.

The global settings serve as a fallback and are used only when the integration settings are not configured in the Form Action.

Note: If any Integration settings are configured in the Form Action, the form will use only the Form Action settings. It will not combine or merge them with the global settings.