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This article explains how to connect your Mailchimp account to iPaaS.com and how to configure the subscription settings that control how the integration sends data to Mailchimp. The integration synchronizes Customers, Products, Product Variants, Orders, and Order Lines from iPaaS.com to your Mailchimp account using the Mailchimp Marketing API.
How to Connect
Prerequisites
Before setting up the Mailchimp integration in iPaaS.com, ensure you have the following:
Active Mailchimp account: An active Mailchimp account with permission to create an API key (administrator or owner access).
A Mailchimp API key: Generate an API key in Mailchimp by following these steps:
Log in to your Mailchimp account.
Click your initials (account icon) in the upper-right corner.
Select Profile.
Navigate to Extras > API keys.
Click Create A Key.
Name the key (for example, "iPaaS.com").
Copy the generated key and save it for use in iPaaS.com. Mailchimp does not display the full key again after you leave this screen.
Your Mailchimp API URL: This is the base address for your Mailchimp account's region (its "server prefix" or data center). When you are logged in to Mailchimp, your browser address looks like
https://us13.admin.mailchimp.com. Replaceadminwithapito get your API URL — for example,https://us13.api.mailchimp.com. The characters afterhttps://(such asus13) identify your region and vary from account to account.
Configure Subscription Settings
Navigate to the Mailchimp subscription settings in iPaaS.com and provide the following information. The first settings establish and authenticate the connection; the remaining settings are optional and control how product, variant, and order data is processed.
Field | Description | Required |
API Url | The base API URL for your Mailchimp account's region, in the form | Yes |
API Key | The Mailchimp Marketing API key you generated in your Mailchimp account. The integration uses this key to authenticate every request. | Yes |
Variant External Id Delimiter | The single character that separates the product identifier from the variant identifier when the integration builds a variant's external identifier. For example, with the pipe character ( | No |
Special Character Replacement | A safe character that replaces reserved characters ( | No |
Use Store Id From Transaction | Accepts | No |
Customer Store Id Custom Field Name | The name of the customer custom field that the store identifier is written to and read from. This setting is used together with Use Store Id From Transaction to locate the store identifier on customer records. | No |
Authenticate the Connection
Enter the API Url and API Key in the Mailchimp subscription settings, and confirm:
API Url matches the format
https://<region>.api.mailchimp.com, using the region shown in your Mailchimp browser address.API Key is the key you generated in the Prerequisites section.
Click Save to store the settings.
The integration authenticates to the Mailchimp Marketing API using your API key. Mailchimp accepts the key with HTTP Basic authentication, where the username can be any value and the API key is supplied as the password; the integration handles this for you once the API Key and API Url are saved. (Source: Mailchimp Marketing API — Quick Start, mailchimp.com/developer, retrieved 2026-06-29.)
Initialization Support
Initialization is not supported for Mailchimp in iPaaS.com. Data synchronization and mappings are configured during setup rather than seeded by a bulk initialization step. For a one-time load of a large set of existing records, subscribers or their MiSP can perform a bulk sync using Postman.
Throttling
Throttling controls how many requests the integration sends to the Mailchimp API over a given period, preserving performance during heavy data transfers. The throttling fields are required, but their values are pre-populated by the integration settings. For more details, refer to Subscription Configuration – Edit.