MCP Server Trello

A Model Context Protocol (MCP) server that provides tools for interacting with Trello boards. This server enables seamless integration with Trello's API while handling rate limiting, type safety, and error handling automatically.

Features

Full Trello Board Integration: Interact with cards, lists, and board activities
Built-in Rate Limiting: Respects Trello's API limits (300 requests/10s per API key, 100 requests/10s per token)
Type-Safe Implementation: Written in TypeScript with comprehensive type definitions
Input Validation: Robust validation for all API inputs
Error Handling: Graceful error handling with informative messages

Installation

npm install @modelcontextprotocol/mcp-server-trello

Configuration

Add the server to your MCP settings file with the following configuration:

{
  "mcpServers": {
    "trello": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-trello"],
      "env": {
        "TRELLO_API_KEY": "your-api-key",
        "TRELLO_TOKEN": "your-token",
        "TRELLO_BOARD_ID": "your-board-id"
      }
    }
  }
}

Required Environment Variables

TRELLO_API_KEY: Your Trello API key (get from https://trello.com/app-key)
TRELLO_TOKEN: Your Trello token (generate using your API key)
TRELLO_BOARD_ID: ID of the Trello board to interact with (found in board URL)

Available Tools

get_cards_by_list_id

Fetch all cards from a specific list.

{
  name: 'get_cards_by_list_id',
  arguments: {
    listId: string  // ID of the Trello list
  }
}

get_lists

Retrieve all lists from the configured board.

{
  name: 'get_lists',
  arguments: {}
}

get_recent_activity

Fetch recent activity on the board.

{
  name: 'get_recent_activity',
  arguments: {
    limit?: number  // Optional: Number of activities to fetch (default: 10)
  }
}

add_card_to_list

Add a new card to a specified list.

{
  name: 'add_card_to_list',
  arguments: {
    listId: string,       // ID of the list to add the card to
    name: string,         // Name of the card
    description?: string, // Optional: Description of the card
    dueDate?: string,    // Optional: Due date (ISO 8601 format)
    labels?: string[]    // Optional: Array of label IDs
  }
}

update_card_details

Update an existing card's details.

{
  name: 'update_card_details',
  arguments: {
    cardId: string,       // ID of the card to update
    name?: string,        // Optional: New name for the card
    description?: string, // Optional: New description
    dueDate?: string,    // Optional: New due date (ISO 8601 format)
    labels?: string[]    // Optional: New array of label IDs
  }
}

archive_card

Send a card to the archive.

{
  name: 'archive_card',
  arguments: {
    cardId: string  // ID of the card to archive
  }
}

add_list_to_board

Add a new list to the board.

{
  name: 'add_list_to_board',
  arguments: {
    name: string  // Name of the new list
  }
}

archive_list

Send a list to the archive.

{
  name: 'archive_list',
  arguments: {
    listId: string  // ID of the list to archive
  }
}

get_my_cards

Fetch all cards assigned to the current user.

{
  name: 'get_my_cards',
  arguments: {}
}

Rate Limiting

The server implements a token bucket algorithm for rate limiting to comply with Trello's API limits:

300 requests per 10 seconds per API key
100 requests per 10 seconds per token

Rate limiting is handled automatically, and requests will be queued if limits are reached.

Error Handling

The server provides detailed error messages for various scenarios:

Invalid input parameters
Rate limit exceeded
API authentication errors
Network issues
Invalid board/list/card IDs

Development

Prerequisites

Node.js 16 or higher
npm or yarn

Setup

Clone the repository

git clone https://github.com/modelcontextprotocol/server-trello.git
cd server-trello

Install dependencies

npm install

Build the project

npm run build

Running Tests

npm test

Contributing

Contributions are welcome! Please read our Contributing Guide for details on our code of conduct and the process for submitting pull requests.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

Built with the Model Context Protocol SDK
Uses the Trello REST API