Update List Member: Mailchimp action

Inputs

The fields this action accepts.

Every field can be mapped from an upstream trigger, AI step, table row, or hard-coded literal.

Field	Type	Required	Description
Audience/List ID list_id	string	Required	Mailchimp audience (list) ID — a 10-char hex string. Find in Audience > Settings > Audience name & defaults.
Subscriber Hash subscriber_hash	string	Required	Lowercase MD5 hash of the subscriber's email. Pass the email if your SDK auto-hashes.
Status status	options	Optional	Status. Options: Subscribed, Unsubscribed, Cleaned, Pending
First Name first_name	string	Optional	Contact's first (given) name.
Last Name last_name	string	Optional	Contact's last (family) name.

Sample request

{
  "list_id": "e.g. a1b2c3d4e5",
  "subscriber_hash": "e.g. 7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d",
  "status": "{{trigger.status}}",
  "first_name": "e.g. Jane",
  "last_name": "e.g. Doe"
}

Returns

{
  "id": "abc123",
  "status": "subscribed",
  "email_address": "user@example.com"
}

Use these fields in downstream nodes for routing, logging, or error handling.

FAQ

Questions about Update List Member.

What does the Update List Member action do in Mailchimp?

Updates an existing Mailchimp list member's status, merge fields, tags, or interests. Also the right call for setting status="unsubscribed" without deleting.

What inputs does Update List Member require?

Required: Audience/List ID, Subscriber Hash. Every input accepts a static value or a variable from any upstream node in your workflow.

Can I use dynamic inputs from earlier workflow nodes?

Yes. Any field on this action can pull values from upstream nodes, whether that's a form response, a trigger payload, an AI output, or a lookup result.

What happens if Mailchimp returns an error?

The workflow pauses on the failed node, the error message is captured in the run log, and you can retry the run with one click. Auto-retry policies are configurable per workflow with exponential backoff up to 5 attempts.

Does Update List Member support batch operations?

Yes. Run Update List Member inside a Loop node to process arrays. Tiny Command handles Mailchimp's rate limits automatically so you don't have to throttle manually.

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