ConvertKit (Kit)

Connect & Ingest data from Kit (ConvertKit)

Kit (formerly ConvertKit) is an email marketing platform designed for creators, bloggers, and small businesses. It provides tools for managing subscribers, creating email sequences, building forms and landing pages, and sending broadcast emails. The Sling Kit connector extracts data from the Kit API v4, supporting subscribers, tags, forms, sequences, broadcasts, custom fields, segments, and webhooks.

CLI Pro Required: APIs require a CLI Pro token or Platform Plan.

Setup

The following credentials and inputs are accepted:

Secrets:

• api_key (required) -> Your Kit V4 API key

Inputs:

• anchor_date (optional) -> Starting date for first sync (ISO 8601 format, e.g., 2024-01-01T00:00:00Z). Defaults to 1 year ago.

Getting Your API Key

1. Log in to your Kit account

2. Click on Settings in the left sidebar

3. Navigate to Developer settings (or go directly to https://app.kit.com/account_settings/developer_settings)

4. Under V4 API Keys, copy your API key (it looks like: kit_abc123def456...)

Using sling conns

sling conns set CONVERTKIT type=api spec=convertkit secrets='{ api_key: "kit_your_api_key_here" }'

Environment Variable

See here to learn more about the .env.sling file.

export CONVERTKIT='{ type: api, spec: convertkit, secrets: { api_key: "kit_your_api_key_here" } }'

Sling Env File YAML

See here to learn more about the sling env.yaml file.

connections:
  CONVERTKIT:
    type: api
    spec: convertkit
    secrets:
      api_key: "kit_your_api_key_here"

Replication

Here's an example replication configuration to sync Kit data to a PostgreSQL database:

source: CONVERTKIT
target: MY_POSTGRES

defaults:
  mode: full-refresh
  object: convertkit.{stream_name}

streams:
  subscribers:
    mode: incremental
    primary_key: [id]
    update_key: created_at
  tags:
    primary_key: [id]
  forms:
    primary_key: [id]
  sequences:
    primary_key: [id]
  broadcasts:
    primary_key: [id]
  custom_fields:
    primary_key: [id]
  segments:
    primary_key: [id]
  webhooks:
    primary_key: [id]

Incremental sync example:

source: CONVERTKIT
target: MY_POSTGRES

defaults:
  mode: incremental
  object: convertkit.{stream_name}

streams:
  subscribers:
    primary_key: [id]
    update_key: created_at

Full refresh example:

source: CONVERTKIT
target: MY_POSTGRES

defaults:
  mode: full-refresh
  object: convertkit.{stream_name}

streams:
  tags:
  forms:
  sequences:
  broadcasts:
  custom_fields:
  segments:
  webhooks:

Endpoints

Subscriber Management

Endpoint	Description	Incremental
subscribers	All subscribers with email, name, state, and custom fields	Yes
tags	Tags used to categorize subscribers	No
custom_fields	Custom field definitions	No
segments	Subscriber segments	No

Content & Campaigns

Endpoint	Description	Incremental
forms	Forms and landing pages	No
sequences	Email automation sequences	No
broadcasts	Broadcast emails (drafts, scheduled, and sent)	No

Configuration

Endpoint	Description	Incremental
webhooks	Webhook subscriptions	No

To discover available endpoints:

sling conns discover CONVERTKIT

Incremental Sync

The Kit connector supports time-based incremental sync for the following endpoint:

• subscribers - Syncs new/modified subscribers by created_at

How it works

• First run: Fetches all subscribers from the anchor date (defaults to 1 year ago, configurable via the anchor_date input)

• Subsequent runs: Only fetches subscribers created or modified after the last sync timestamp

Custom Anchor Date

To specify a custom starting point for the first sync:

connections:
  CONVERTKIT:
    type: api
    spec: convertkit
    secrets:
      api_key: "kit_your_api_key_here"
    inputs:
      anchor_date: "2024-01-01T00:00:00Z"

Rate Limiting

The Kit API v4 has a rate limit of 120 requests per 60 seconds. The connector automatically:

• Uses conservative rate limiting (2 requests/second)

• Retries with exponential backoff on 429 (rate limit) responses

• Retries on 5xx server errors

Common Use Cases

Sync All Subscriber Data

source: CONVERTKIT
target: MY_POSTGRES

defaults:
  mode: full-refresh
  object: subscribers.{stream_name}

streams:
  subscribers:
    mode: incremental
    primary_key: [id]
    update_key: created_at
  tags:
  custom_fields:
  segments:

Sync Campaign and Content Data

source: CONVERTKIT
target: MY_POSTGRES

defaults:
  mode: full-refresh
  object: campaigns.{stream_name}

streams:
  broadcasts:
  sequences:
  forms:

Sync All Kit Data

source: CONVERTKIT
target: MY_POSTGRES

defaults:
  mode: full-refresh
  object: convertkit.{stream_name}

streams:
  '*':

If you are facing issues connecting, please reach out to us at [e-mail], on discord or open a Github Issue here.