MCP Kit Server

An MCP (Model Context Protocol) server that connects AI assistants like Claude to the Kit.com (formerly ConvertKit) email marketing platform. Manage your email lists, subscribers, broadcasts, sequences, and more through natural language.

Why Use This?

If you run a newsletter or email marketing on Kit.com, this MCP server lets you:

Manage subscribers - List, create, update, and organize your email subscribers
Handle tags efficiently - Create tags, add/remove tags from subscribers, list subscribers by tag
Work with sequences - View email sequences and add subscribers to automated sequences
Create broadcasts - Draft and manage email campaigns
Analyze your list - Query subscriber data with filters (status, date ranges, custom fields)
Automate workflows - Let Claude handle repetitive email marketing tasks

Features

Category	Tools
Account	Get account information
Subscribers	List, get, create, update, manage tags
Tags	List, create, update, delete, get subscribers by tag
Sequences	List, get, add subscribers
Broadcasts	List, get, create, update, delete
Forms	List, get, add subscribers
Custom Fields	List available fields
Webhooks	List, create, delete

Complete Tool Reference

Account

kit_get_account - Get Kit.com account information

Subscribers (7 tools)

kit_list_subscribers - List subscribers with filters (status, date ranges, pagination)
kit_get_subscriber - Get a specific subscriber by ID
kit_create_subscriber - Create a new subscriber
kit_update_subscriber - Update subscriber details
kit_get_subscriber_tags - Get all tags for a subscriber
kit_add_tag_to_subscriber - Add a tag to a subscriber
kit_remove_tag_from_subscriber - Remove a tag from a subscriber

Tags (6 tools)

kit_list_tags - List all tags
kit_get_tag - Get a specific tag
kit_create_tag - Create a new tag
kit_update_tag - Rename a tag
kit_delete_tag - Delete a tag
kit_list_tag_subscribers - List all subscribers with a specific tag

Sequences (3 tools)

kit_list_sequences - List all email sequences
kit_get_sequence - Get sequence details
kit_add_subscriber_to_sequence - Add subscriber to a sequence

Broadcasts (5 tools)

kit_list_broadcasts - List all broadcasts
kit_get_broadcast - Get broadcast details
kit_create_broadcast - Create a new broadcast
kit_update_broadcast - Update a broadcast
kit_delete_broadcast - Delete a broadcast

Forms (3 tools)

kit_list_forms - List all forms
kit_get_form - Get form details
kit_add_subscriber_to_form - Add subscriber via form

Custom Fields (1 tool)

kit_list_custom_fields - List all custom fields

Webhooks (3 tools)

kit_list_webhooks - List configured webhooks
kit_create_webhook - Create a new webhook
kit_delete_webhook - Delete a webhook

Prerequisites

Node.js 18+
A Kit.com account
Your Kit.com API key (v4 API)

Installation

Option 1: Install from npm (recommended)

npx kit-mcp-server

Or install globally:

npm install -g kit-mcp-server

Option 2: Clone and Build

git clone https://github.com/aplaceforallmystuff/mcp-kit.git
cd mcp-kit
npm install
npm run build

Configuration

1. Get Your Kit.com API Key

Log in to Kit.com
Navigate to Settings > Developer
Create a new API key or copy an existing v4 API key

2. Configure Your MCP Client

For Claude Desktop

Add to your Claude Desktop config file:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "kit": {
      "command": "node",
      "args": ["/path/to/mcp-kit/dist/index.js"],
      "env": {
        "KIT_API_KEY": "your-api-key-here"
      }
    }
  }
}

For Claude Code

claude mcp add kit -e KIT_API_KEY=your-api-key-here -- node /path/to/mcp-kit/dist/index.js

Or add to ~/.claude.json:

{
  "mcpServers": {
    "kit": {
      "command": "node",
      "args": ["/path/to/mcp-kit/dist/index.js"],
      "env": {
        "KIT_API_KEY": "your-api-key-here"
      }
    }
  }
}

Usage Examples

Once configured, you can interact with Kit.com through natural language:

Subscriber Management

"Show me all active subscribers from the last 30 days"

"Create a new subscriber with email user@example.com and tag them as 'newsletter'"

"What tags does subscriber@example.com have?"

Tag Operations

"List all my tags and how many subscribers each has"

"Create a tag called 'VIP Customers'"

"Add the 'engaged' tag to all subscribers who signed up this month"

Email Sequences

"Show me all my email sequences"

"Add user@example.com to the welcome sequence"

Broadcasts

"Create a draft broadcast with subject 'Weekly Update' and preview text 'This week in AI...'"

"List all my recent broadcasts and their stats"

Forms

"Show me all active forms"

"Add a subscriber to my main signup form"

Development

# Run in development mode (watches for changes)
npm run dev

# Build for production
npm run build

# Run the built version
npm start

Troubleshooting

"KIT_API_KEY environment variable is required"

Ensure you have set the KIT_API_KEY environment variable in your MCP configuration.

"Kit API error (401)"

Your API key is invalid or expired. Generate a new one from Kit.com Settings > Developer.

"Kit API error (403)"

Your API key doesn't have permission for this operation. Check that you're using a v4 API key with appropriate scopes.

"Kit API error (404)"

The resource (subscriber, tag, broadcast, etc.) was not found. Verify the ID is correct.

"Kit API error (422)"

Invalid request data. Check that email addresses are valid and required fields are provided.

API Reference

This server uses the Kit.com API v4. All tools support pagination where applicable using per_page and after cursor parameters.

Contributing

Contributions are welcome! Please see CONTRIBUTING.md for guidelines.

License

MIT License - see LICENSE for details.

mcp-kit

Documentation