Kit (ConvertKit)
Manage newsletter subscribers, forms, and tags with Kit (formerly ConvertKit). Popular with creators and bloggers. API key auth.
setup_integration or the Dashboard Vault — they're encrypted
with AES-256-GCM and never exposed.
Required Credentials
Endpoints (5)
List all signup forms. Returns form ID, name, type, and subscriber count. Use form IDs for the add-subscriber endpoint.
No input parameters required.
Add a subscriber to a specific form. Creates the subscriber if new, or updates if existing. Triggers double opt-in if form has it enabled.
| Field | Type | Required | Description |
|---|---|---|---|
form_id |
string | ✓ Yes | Form ID to subscribe to (get from list-forms). |
email_address |
✓ Yes | Subscriber email address. | |
first_name |
string | No | Subscriber first name. |
List all subscribers. Returns email, name, state (active/inactive/cancelled), and creation date.
No input parameters required.
List all tags. Returns tag ID, name, and creation date. Use tag IDs for the tag-subscriber endpoint.
No input parameters required.
Add a tag to a subscriber by email. Useful for segmentation and automation triggers.
| Field | Type | Required | Description |
|---|---|---|---|
tag_id |
string | ✓ Yes | Tag ID to apply (get from list-tags). |
email_address |
✓ Yes | Subscriber email address to tag. |
MCP Tool Names
When using this integration through an AI assistant (Claude, ChatGPT, Cursor, etc.), the endpoints are available as MCP tools:
| Endpoint | MCP Tool Name |
|---|---|
| list-forms | convertkit_list_forms |
| add-subscriber | convertkit_add_subscriber |
| list-subscribers | convertkit_list_subscribers |
| list-tags | convertkit_list_tags |
| tag-subscriber | convertkit_tag_subscriber |