Add Subscriber: Kit (ConvertKit) 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
Email email_address	string	Required	Email. e.g. "subscriber@example.com"
First Name first_name	string	Optional	First Name. e.g. "John"
State state	options	Optional	State. Options: Active, Inactive
Tag IDs tags	string	Optional	Comma-separated tag IDs to apply

Sample request

{
  "email_address": "subscriber@example.com",
  "first_name": "John",
  "state": "{{trigger.state}}",
  "tags": "e.g. 123, 456"
}

Returns

{
  "subscriber": {
    "id": 12345,
    "state": "active",
    "created_at": "2025-01-15T12:00:00.000Z",
    "first_name": "John",
    "email_address": "subscriber@example.com"
  }
}

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

FAQ

Questions about Add Subscriber.

What does the Add Subscriber action do in Kit (ConvertKit)?

Adds a subscriber with email, name, custom fields, optional starting tags. Respects the list's configured double-opt-in setting. For "form submission outside Kit → push to Kit list" sync workflows.

What inputs does Add Subscriber require?

Required: Email. 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 Kit (ConvertKit) 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 Add Subscriber support batch operations?

Yes. Run Add Subscriber inside a Loop node to process arrays. Tiny Command handles Kit (ConvertKit)'s rate limits automatically so you don't have to throttle manually.

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