> For the complete documentation index, see [llms.txt](https://docs.n8n.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.n8n.io/integrations/builtin/credentials/mandrill.md).

# Mandrill credentials

You can use these credentials to authenticate the following nodes:

* [Mandrill](/integrations/builtin/app-nodes/n8n-nodes-base.mandrill.md)

## Prerequisites <a href="#prerequisites" id="prerequisites"></a>

* Create a Mailchimp [Transactional email account](https://mailchimp.com/features/transactional-email-infrastructure/)
* Log in to [Mandrill](https://mandrillapp.com/login/) with your Mailchimp account.

If you already have a Mailchimp account with a Standard plan or higher, enable [Transactional Emails](https://mailchimp.com/help/add-or-remove-transactional-email) within that account to use Mandrill.

## Supported authentication methods <a href="#supported-authentication-methods" id="supported-authentication-methods"></a>

* API key

## Related resources <a href="#related-resources" id="related-resources"></a>

Refer to [Mailchimp's Transactional API documentation](https://mailchimp.com/developer/transactional/api/) for more information about the service.

## Using API key <a href="#using-api-key" id="using-api-key"></a>

To configure this credential, you'll need:

* An **API Key**: Generate an API key from the Mandrill [Settings](https://mandrillapp.com/settings). Refer to Mailchimp's [Generate your API key documentation](https://mailchimp.com/developer/transactional/guides/quick-start/#generate-your-api-key) for more detailed instructions.