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Admin or Account Owner permissions in Mailchimp are required to create OAuth applications.

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Creating an OAuth Application

Create an OAuth application to obtain Client ID and Client Secret for secure integration.

1

Sign in to Mailchimp

Sign in to your Mailchimp account with Admin or Owner permissions.

2

Navigate to Registered Apps

From your Mailchimp account page:

  • Navigate to your account settings (Account & billing).
  • Click on Extras in the top navigation menu.
  • Select Registered Apps from the dropdown menu.
3

Register a New App

On the Registered Apps page:

  • Click the Register An App button.
  • Fill in the required fields - App name (e.g., “StackOne Integration”), App description, Company/organization, and App website.
  • Optionally upload a logo (JPG, GIF, or PNG, up to 1MB).
  • Enter the Redirect URI https://api.stackone.com/connect/oauth2/mailchimp/callback.
  • Click Create to generate your application.
4

Copy Client ID and Secret

After creating the app:

  • Copy the Client ID from the app details page.
  • Copy the Client Secret and store it securely.
  • The Client Secret is displayed once - save it immediately.

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Finding Your Server Prefix

Your server prefix identifies the Mailchimp datacenter for your account and is required for API requests.

1

Obtain from OAuth Metadata

After OAuth authorization completes:

  • The server prefix is retrieved automatically from the OAuth metadata endpoint at https://login.mailchimp.com/oauth2/metadata.
  • The metadata response includes the datacenter prefix (e.g., us1, us19).
2

Alternative Method

You can also find your server prefix:

  • Look at your Mailchimp account URL when logged in (e.g., https://us19.admin.mailchimp.com).
  • The prefix is the subdomain before .admin.mailchimp.com (e.g., “us19”).

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Creating the StackOne Connector Profile

To create the Connector Profile in StackOne for Mailchimp:
1

Open the connector

Log in to StackOne, open Connectors, and select Mailchimp.
2

Choose actions and events

  • Click Add Profile.
  • If the connector offers more than one authentication method, set the Auth Method filter to OAuth 2.0.
  • Select the actions, and any events, to enable for this Connector Profile.
  • Click Continue.
3

Set up authentication

  • Select Authentication Type as OAuth 2.0.
  • Fill out the fields using details retrieved from your provider:
    • Client ID
    • Client Secret
    • Server Prefix
  • Click Create Profile.
Congratulations! The new Connector Profile now shows up on the connector page. If you created it as a project member rather than an admin, it starts disabled until a project admin enables it. You can now continue to Link Accounts for Mailchimp.