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**Requirements:** Admin role; the Marketing API key from section 3 (and, if you want transactional emails, the Mandrill key).

1. In **Integrations**, find the **MailChimp** card (in "Available" status) and click **Connect**.
2. The "Connect MailChimp" modal repeats section 3's help, so you have it at hand without going back to MailChimp.
3. Paste the **API Key (Marketing)** into the first field.
4. If you have a Mandrill key, paste it into the optional **Mandrill API Key (optional)** field — if not, leave it empty and carry on the same.
5. Click **Connect**.

**Result:** the Platform **verifies the key against MailChimp for real** before saving anything — it doesn't accept a validly-formatted key at face value. If verification fails, you're told the specific error (section 8) and no credential is saved. If it succeeds, the card switches to **Connected**.

![«Connect MailChimp» modal with the instruction to create the key under Account → Extras → API keys in MailChimp, the note that the datacenter is detected automatically, the notice about the optional Mandrill key, the API Key (Marketing) field, the optional Mandrill API Key field, and the Cancel and Connect buttons](/captures/int-mailchimp-connect-modal.png)