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Trello MCP Lite

by sjalq
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@sjalq/trello-mcp-lite

Minimal Trello MCP server with multi-account support and intelligent API passthrough

A lightweight, pure functional MCP server for Trello that supports multiple accounts and provides direct API access with smart aggregation capabilities.

Features

  • 🔄 Multi-Account Support - Manage multiple Trello accounts simultaneously

  • 🎯 Direct API Passthrough - Full access to Trello REST API v1

  • 🧠 Intelligent Aggregation - Automatically queries all accounts for read operations

  • 💾 Persistent Storage - Securely stores credentials locally

  • ⚡ Pure Functional - Immutable operations, robust error handling

  • 🪶 Lightweight - Single file, minimal dependencies

  • ✅ Well Tested - Property-based and integration tests

Installation

One-line install via Claude MCP CLI:

npx @sjalq/trello-mcp-lite

Or add to your MCP settings:

{ "mcpServers": { "trello": { "command": "npx", "args": ["@sjalq/trello-mcp-lite"] } } }

Quick Start

1. Get Your Trello Credentials

  • API Key: Visit https://trello.com/app-key

  • Token: Click the "Token" link on that same page to authorize

2. Add Your Account

// Using the manage_tokens tool { "operation": "add", "name": "personal", "apiKey": "your_api_key_here", "token": "your_token_here" }

3. Start Using Trello

// List all boards (aggregates across all accounts) { "endpoint": "/members/me/boards", "method": "GET" } // Create a card on specific account { "endpoint": "/cards", "method": "POST", "account": "personal", "body": { "name": "My New Task", "idList": "list_id_here", "desc": "Task description" } }

Tools

1. trello_api - Main API Passthrough

Direct access to Trello REST API v1 with multi-account support.

Parameters:

  • endpoint (required): API endpoint (e.g., /boards/{id}/lists)

  • method (required): HTTP method (GET, POST, PUT, DELETE)

  • account (optional): Specific account name. Omit to aggregate all accounts for read operations

  • query (optional): Query parameters object

  • body (optional): Request body for POST/PUT/DELETE

Common Operations:

// 📋 List all boards (across all accounts) { "endpoint": "/members/me/boards", "method": "GET" } // 📑 Get lists on a board { "endpoint": "/boards/{boardId}/lists", "method": "GET", "account": "work" } // 📝 List cards in a list { "endpoint": "/lists/{listId}/cards", "method": "GET" } // ➕ Create a card { "endpoint": "/cards", "method": "POST", "account": "personal", "body": { "name": "Task name", "idList": "list_id", "desc": "Description", "due": "2025-12-31" } } // ✏️ Update a card { "endpoint": "/cards/{cardId}", "method": "PUT", "body": { "name": "Updated name" } } // 📌 Move card to different list { "endpoint": "/cards/{cardId}", "method": "PUT", "body": { "idList": "new_list_id" } } // ✅ Complete/archive a card { "endpoint": "/cards/{cardId}", "method": "PUT", "body": { "closed": true } } // 💬 Add comment to card { "endpoint": "/cards/{cardId}/actions/comments", "method": "POST", "query": { "text": "My comment" } } // 🏷️ Add label to card { "endpoint": "/cards/{cardId}/idLabels", "method": "POST", "body": { "value": "label_id" } }

Response Format:

{ "status": 200, "ok": true, "data": { /* Trello API response */ } }

Multi-Account Aggregation: When you omit the account parameter on aggregatable read operations (like /members/me/boards), the tool automatically queries all configured accounts:

{ "status": 207, "ok": true, "data": { "personal": [{ "id": "abc", "name": "Personal Board" }], "work": [{ "id": "xyz", "name": "Work Board" }], "client": [{ "id": "def", "name": "Client Board" }] } }

2. manage_tokens - Account Management

Manage your Trello account credentials.

Add Account:

{ "operation": "add", "name": "work", "apiKey": "your_api_key", "token": "your_token" }

Remove Account:

{ "operation": "remove", "name": "work" }

List Accounts:

{ "operation": "list" }

Multi-Account Workflow

Example: Managing Personal and Work Trello

// 1. Add both accounts manage_tokens({ operation: "add", name: "personal", apiKey: "...", token: "..." }) manage_tokens({ operation: "add", name: "work", apiKey: "...", token: "..." }) // 2. List all boards from both accounts trello_api({ endpoint: "/members/me/boards", method: "GET" }) // Returns: { personal: [...], work: [...] } // 3. Create card on work account trello_api({ endpoint: "/cards", method: "POST", account: "work", body: { name: "Work task", idList: "list123" } }) // 4. Create card on personal account trello_api({ endpoint: "/cards", method: "POST", account: "personal", body: { name: "Personal task", idList: "list456" } })

Storage

Credentials are stored securely in:

~/.trello-mcp-lite/tokens.json

Format:

{ "personal": { "apiKey": "...", "token": "..." }, "work": { "apiKey": "...", "token": "..." } }

API Reference

Full Trello REST API documentation: https://developer.trello.com/reference

Most Common Endpoints:

  • /members/me/boards - List user's boards

  • /boards/{id}/lists - Get lists on a board

  • /lists/{id}/cards - Get cards in a list

  • /cards - Create a new card

  • /cards/{id} - Update/delete a card

  • /cards/{id}/actions/comments - Add comment

Development

# Clone the repo git clone https://github.com/sjalq/trello-mcp-lite.git cd trello-mcp-lite # Install dependencies npm install # Run tests npm test

Architecture

  • Pure Functional: All operations are immutable transformations

  • Error Handling: Graceful degradation with detailed error messages

  • Logging: Minimal stderr logging for debugging

  • No State Mutations: Read → Transform → Write pattern

Testing

Includes comprehensive test suite:

  • Property-based tests (using fast-check)

  • Integration tests

  • Unit tests

npm test

License

ISC

Author

sjalq

Contributing

Issues and PRs welcome at https://github.com/sjalq/trello-mcp-lite

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