# Mailchimp Transactional (/docs/adapters/mailchimp)



<ProviderBadge adapter="mailchimp" />

Mailchimp Transactional is the API formerly known as Mandrill.

```ts
import { createEmailClient } from "email-sdk";
import { mailchimp } from "email-sdk/mailchimp";

const email = createEmailClient({
  adapters: [mailchimp({ apiKey: process.env.MAILCHIMP_API_KEY! })],
});
```

## Options [#options]

| Option    | Type           | Required | Notes                                          |
| --------- | -------------- | -------- | ---------------------------------------------- |
| `apiKey`  | `string`       | Yes      | Mailchimp Transactional API key.               |
| `baseUrl` | `string`       | No       | Defaults to `https://mandrillapp.com/api/1.0`. |
| `fetch`   | `typeof fetch` | No       | Useful for tests or custom runtimes.           |

See <a href="/docs/adapters/field-support">field support</a> for supported message fields.