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Documentation Index

Fetch the complete documentation index at: https://docs.alterauth.com/llms.txt

Use this file to discover all available pages before exploring further.

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Overview

Connect your users to Mailchimp for email marketing campaigns, audience management, and subscriber data.
PropertyValue
Provider IDmailchimp
CategoryMarketing
PKCENot supported
Token refreshNot supported (permanent tokens)
Redirect URIShown in Developer Portal

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Step 1: Create a Mailchimp OAuth App

1

Go to the Mailchimp OAuth2 page

Navigate to admin.mailchimp.com/account/oauth2 and sign in.
2

Register a new application

Click Register App and fill in the application name, description, and website URL.
3

Configure the redirect URI

Enter the Alter callback URL from the Developer Portal as the Redirect URI.
4

Get your credentials

Copy the Client ID and Client Secret.
Never share your Client Secret publicly. Store it securely and only enter it in the Alter Vault Developer Portal.

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Step 2: Add to Alter Vault

1

Open the Developer Portal

Go to portal.alterauth.com and navigate to your app.
2

Add Mailchimp provider

Go to OAuth Providers > Add Provider > Mailchimp.
3

Enter credentials

  • Client ID: Paste your Mailchimp Client ID
  • Client Secret: Paste your Mailchimp Client Secret
4

Save

Click Save. The provider is now active.

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Notes

  • Mailchimp issues permanent (non-expiring) access tokens. There is no refresh token flow.
  • No scope selection is required — the token grants access to all Mailchimp API endpoints for the authenticated user.
  • Mailchimp uses a data center suffix in API URLs (e.g., us1). The API base URL is returned in the metadata endpoint after authorization.
  • See the Mailchimp OAuth2 guide for more details.