v1.0.2

Kit

byungkyu byungkyu ← All skills

Kit (formerly ConvertKit) API integration with managed OAuth. Manage email subscribers, forms, tags, sequences, broadcasts, and custom fields. Use this skill when users want to manage their email marketing lists, create or update subscribers, manage tags, or work with email sequences and broadcasts. For other third party apps, use the api-gateway skill (https://clawhub.ai/byungkyu/api-gateway).

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Versions
3
Updated
2026-02-23

Install

npx clawhub@latest install kit

Documentation

Kit

Access the Kit (formerly ConvertKit) API with managed OAuth authentication. Manage subscribers, tags, forms, sequences, broadcasts, custom fields, and webhooks.

Quick Start

List subscribers


python <<'EOF'


import urllib.request, os, json


req = urllib.request.Request('https://gateway.maton.ai/kit/v4/subscribers?per_page=10')


req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')


print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))


EOF

Base URL

https://gateway.maton.ai/kit/{native-api-path}

Replace {native-api-path} with the actual Kit API endpoint path. The gateway proxies requests to api.kit.com and automatically injects your OAuth token.

Authentication

All requests require the Maton API key in the Authorization header:

Authorization: Bearer $MATON_API_KEY
Environment Variable: Set your API key as MATON_API_KEY: 
export MATON_API_KEY="YOUR_API_KEY"

Getting Your API Key

1. Sign in or create an account at [maton.ai](https://maton.ai)

2. Go to [maton.ai/settings](https://maton.ai/settings)

3. Copy your API key

Connection Management

Manage your Kit OAuth connections at https://ctrl.maton.ai.

List Connections

python <<'EOF'

import urllib.request, os, json


req = urllib.request.Request('https://ctrl.maton.ai/connections?app=kit&status=ACTIVE')


req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')


print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))


EOF

Create Connection

python <<'EOF'

import urllib.request, os, json


data = json.dumps({'app': 'kit'}).encode()


req = urllib.request.Request('https://ctrl.maton.ai/connections', data=data, method='POST')


req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')


req.add_header('Content-Type', 'application/json')


print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))


EOF

Get Connection

python <<'EOF'

import urllib.request, os, json


req = urllib.request.Request('https://ctrl.maton.ai/connections/{connection_id}')


req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')


print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))


EOF
Response: 
{

  "connection": {


    "connection_id": "cb2025b3-706f-4b5d-87a5-c6809c0c7ec4",


    "status": "ACTIVE",


    "creation_time": "2026-02-07T00:04:08.476727Z",


    "last_updated_time": "2026-02-07T00:05:58.001964Z",


    "url": "https://connect.maton.ai/?session_token=...",


    "app": "kit",


    "metadata": {}


  }


}

Open the returned url in a browser to complete OAuth authorization.

Delete Connection

python <<'EOF'

import urllib.request, os, json


req = urllib.request.Request('https://ctrl.maton.ai/connections/{connection_id}', method='DELETE')


req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')


print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))


EOF

Specifying Connection

If you have multiple Kit connections, specify which one to use with the Maton-Connection header:

python <<'EOF'

import urllib.request, os, json


req = urllib.request.Request('https://gateway.maton.ai/kit/v4/subscribers')


req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')


req.add_header('Maton-Connection', 'cb2025b3-706f-4b5d-87a5-c6809c0c7ec4')


print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))


EOF

If omitted, the gateway uses the default (oldest) active connection.

API Reference

Subscribers

#### List Subscribers

GET /kit/v4/subscribers

Query parameters:

  • -per_page - Results per page (default: 500, max: 1000)
  • -after - Cursor for next page
  • -before - Cursor for previous page
  • -status - Filter by: active, inactive, bounced, complained, cancelled, or all
  • -email_address - Filter by specific email
  • -created_after / created_before - Filter by creation date (yyyy-mm-dd)
  • -updated_after / updated_before - Filter by update date (yyyy-mm-dd)
  • -include_total_count - Include total count (slower)
Response: 
{

  "subscribers": [


    {


      "id": 3914682852,


      "first_name": "Test User",


      "email_address": "test@example.com",


      "state": "active",


      "created_at": "2026-02-07T00:42:54Z",


      "fields": {"company": null}


    }


  ],


  "pagination": {


    "has_previous_page": false,


    "has_next_page": false,


    "start_cursor": "WzE0OV0=",


    "end_cursor": "WzE0OV0=",


    "per_page": 500


  }


}

#### Get Subscriber

GET /kit/v4/subscribers/{id}

#### Create Subscriber

POST /kit/v4/subscribers

Content-Type: application/json



{


  "email_address": "user@example.com",


  "first_name": "John"


}

#### Update Subscriber

PUT /kit/v4/subscribers/{id}

Content-Type: application/json



{


  "first_name": "Updated Name"


}

Tags

#### List Tags

GET /kit/v4/tags

Query parameters: per_page, after, before, include_total_count

#### Create Tag

POST /kit/v4/tags

Content-Type: application/json



{


  "name": "new-tag"


}
Response: 
{

  "tag": {


    "id": 15690016,


    "name": "new-tag",


    "created_at": "2026-02-07T00:42:53Z"


  }


}

#### Update Tag

PUT /kit/v4/tags/{id}

Content-Type: application/json



{


  "name": "updated-tag-name"


}

#### Delete Tag

DELETE /kit/v4/tags/{id}

Returns 204 No Content on success.

#### Tag a Subscriber

POST /kit/v4/tags/{tag_id}/subscribers

Content-Type: application/json



{


  "email_address": "user@example.com"


}

#### Remove Tag from Subscriber

DELETE /kit/v4/tags/{tag_id}/subscribers/{subscriber_id}

Returns 204 No Content on success.

#### List Subscribers with Tag

GET /kit/v4/tags/{tag_id}/subscribers

Forms

#### List Forms

GET /kit/v4/forms

Query parameters:

  • -per_page, after, before, include_total_count
  • -status - Filter by: active, archived, trashed, or all
  • -type - embed for embedded forms, hosted for landing pages
Response: 
{

  "forms": [


    {


      "id": 9061198,


      "name": "Creator Profile",


      "created_at": "2026-02-07T00:00:32Z",


      "type": "embed",


      "format": null,


      "embed_js": "https://chris-kim-2.kit.com/c682763b07/index.js",


      "embed_url": "https://chris-kim-2.kit.com/c682763b07",


      "archived": false,


      "uid": "c682763b07"


    }


  ],


  "pagination": {...}


}

#### Add Subscriber to Form

POST /kit/v4/forms/{form_id}/subscribers

Content-Type: application/json



{


  "email_address": "user@example.com"


}

#### List Form Subscribers

GET /kit/v4/forms/{form_id}/subscribers

Sequences

#### List Sequences

GET /kit/v4/sequences
Response: 
{

  "sequences": [


    {


      "id": 123,


      "name": "Welcome Sequence",


      "hold": false,


      "repeat": false,


      "created_at": "2026-01-01T00:00:00Z"


    }


  ],


  "pagination": {...}


}

#### Add Subscriber to Sequence

POST /kit/v4/sequences/{sequence_id}/subscribers

Content-Type: application/json



{


  "email_address": "user@example.com"


}

#### List Sequence Subscribers

GET /kit/v4/sequences/{sequence_id}/subscribers

Broadcasts

#### List Broadcasts

GET /kit/v4/broadcasts

Query parameters: per_page, after, before, include_total_count

Response: 
{

  "broadcasts": [


    {


      "id": 123,


      "publication_id": 456,


      "created_at": "2026-02-07T00:00:00Z",


      "subject": "My Broadcast",


      "preview_text": "Preview...",


      "content": "<p>Content</p>",


      "public": false,


      "published_at": null,


      "send_at": null,


      "email_template": {"id": 123, "name": "Text only"}


    }


  ],


  "pagination": {...}


}

Segments

#### List Segments

GET /kit/v4/segments

Query parameters: per_page, after, before, include_total_count

Custom Fields

#### List Custom Fields

GET /kit/v4/custom_fields
Response: 
{

  "custom_fields": [


    {


      "id": 1192946,


      "name": "ck_field_1192946_company",


      "key": "company",


      "label": "Company"


    }


  ],


  "pagination": {...}


}

#### Create Custom Field

POST /kit/v4/custom_fields

Content-Type: application/json



{


  "label": "Company"


}

#### Update Custom Field

PUT /kit/v4/custom_fields/{id}

Content-Type: application/json



{


  "label": "Company Name"


}

#### Delete Custom Field

DELETE /kit/v4/custom_fields/{id}

Returns 204 No Content on success.

Purchases

#### List Purchases

GET /kit/v4/purchases

Query parameters: per_page, after, before, include_total_count

Email Templates

#### List Email Templates

GET /kit/v4/email_templates
Response: 
{

  "email_templates": [


    {


      "id": 4956167,


      "name": "Text only",


      "is_default": true,


      "category": "Classic"


    }


  ],


  "pagination": {...}


}

Webhooks

#### List Webhooks

GET /kit/v4/webhooks

#### Create Webhook

POST /kit/v4/webhooks

Content-Type: application/json



{


  "target_url": "https://example.com/webhook",


  "event": {"name": "subscriber.subscriber_activate"}


}
Response: 
{

  "webhook": {


    "id": 5291560,


    "account_id": 2596262,


    "event": {


      "name": "subscriber_activate",


      "initiator_value": null


    },


    "target_url": "https://example.com/webhook"


  }


}

#### Delete Webhook

DELETE /kit/v4/webhooks/{id}

Returns 204 No Content on success.

Pagination

Kit uses cursor-based pagination. Use after and before query parameters with cursor values from the response.

GET /kit/v4/subscribers?per_page=100&after=WzE0OV0=

Response includes pagination info:

{

  "subscribers": [...],


  "pagination": {


    "has_previous_page": false,


    "has_next_page": true,


    "start_cursor": "WzE0OV0=",


    "end_cursor": "WzI0OV0=",


    "per_page": 100


  }


}

Code Examples

JavaScript

const response = await fetch(

  'https://gateway.maton.ai/kit/v4/subscribers?per_page=10',


  {


    headers: {


      'Authorization': Bearer ${process.env.MATON_API_KEY}


    }


  }


);


const data = await response.json();

Python

import os

import requests



response = requests.get(


    'https://gateway.maton.ai/kit/v4/subscribers',


    headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'},


    params={'per_page': 10}


)


data = response.json()

Notes

  • -Kit API uses V4 (V3 is deprecated)
  • -Subscriber IDs are integers
  • -Custom field keys are auto-generated from labels
  • -Bulk operations (>100 items) are processed asynchronously
  • -Delete operations return 204 No Content with empty body
  • -IMPORTANT: When using curl commands, use curl -g when URLs contain brackets to disable glob parsing
  • -IMPORTANT: When piping curl output to jq or other commands, environment variables like $MATON_API_KEY may not expand correctly in some shell environments

Error Handling

| Status | Meaning |

|--------|---------|

| 400 | Missing Kit connection |

| 401 | Invalid or missing Maton API key |

| 403 | Insufficient permissions (check OAuth scopes) |

| 404 | Resource not found |

| 429 | Rate limited |

| 4xx/5xx | Passthrough error from Kit API |

Troubleshooting: API Key Issues

1. Check that the MATON_API_KEY environment variable is set:

echo $MATON_API_KEY

2. Verify the API key is valid by listing connections:

python <<'EOF'

import urllib.request, os, json


req = urllib.request.Request('https://ctrl.maton.ai/connections')


req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')


print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))


EOF

Troubleshooting: Invalid App Name

1. Ensure your URL path starts with kit. For example:

  • -Correct: https://gateway.maton.ai/kit/v4/subscribers
  • -Incorrect: https://gateway.maton.ai/v4/subscribers

Resources

  • -[Kit API Overview](https://developers.kit.com/api-reference/overview)
  • -[Kit API Subscribers](https://developers.kit.com/api-reference/subscribers/list-subscribers)
  • -[Kit API Tags](https://developers.kit.com/api-reference/tags/list-tags)
  • -[Kit API Forms](https://developers.kit.com/api-reference/forms/list-forms)
  • -[Maton Community](https://discord.com/invite/dBfFAcefs2)
  • -[Maton Support](mailto:support@maton.ai)

Launch an agent with Kit on Termo.

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