Connect Mailchimp with a webhook

Add a webhook and choose the Mailchimp adapter. Enter your Mailchimp data center prefix, list ID, and API credentials where the form prompts for them.

Mailchimp rejects bad API keys aggressively—double-check the key belongs to the same region as your audience.

Use Test to trigger a synthetic payload, then confirm the subscriber appears (or updates) in Mailchimp. If Mailchimp returns field validation errors, adjust merge tags in Mailchimp to match the payload fanmigo sends.