Basecamp MCP Server

Basecamp MCP Integration

A modern TypeScript MCP server for Basecamp 3, providing seamless integration with Claude Desktop and Cursor IDE through the Model Context Protocol. Built with the official @modelcontextprotocol/sdk and ready for NPX installation.

✅ TypeScript-First: Modern, type-safe implementation with full async/await support
🚀 NPX Ready: Install and run with npx @basecamp/mcp-server
⚡ 46 API Tools: Complete Basecamp 3 integration with all major features

Quick Setup

NPX Installation (Recommended)

# Install and set up in one command
npx jhliberty/basecamp-mcp-server setup

# Authenticate with Basecamp
npx jhliberty/basecamp-mcp-server auth

# Configure for your AI assistant
npx jhliberty/basecamp-mcp-server config claude   # For Claude Desktop
npx jhliberty/basecamp-mcp-server config cursor  # For Cursor IDE

Prerequisites

Node.js 18+ (required for ES modules)
A Basecamp 3 account
A Basecamp OAuth application (create one at https://launchpad.37signals.com/integrations)

Local Development Setup

For Development

Clone and build the project:
git clone <repository-url> cd basecamp-mcp-server npm install npm run build
Run setup script:
npm run setup
The setup script automatically:
- ✅ Installs all TypeScript dependencies
- ✅ Builds the project to dist/
- ✅ Creates .env template file
- ✅ Tests MCP server functionality
Configure OAuth credentials: Edit the generated .env file:
BASECAMP_CLIENT_ID=your_client_id_here BASECAMP_CLIENT_SECRET=your_client_secret_here BASECAMP_ACCOUNT_ID=your_account_id_here USER_AGENT="Your App Name (your@email.com)"
Authenticate with Basecamp:
npm run auth
Visit http://localhost:8000 and complete the OAuth flow.
Generate configurations:
npm run config:cursor # For Cursor IDE npm run config:claude # For Claude Desktop
Restart your AI assistant completely (quit and reopen)
Verify in your AI assistant:
- Cursor: Go to Settings → MCP, look for "basecamp" with a green checkmark
- Claude Desktop: Look for tools icon (🔍) in chat interface
- Available tools: 46 tools for complete Basecamp control

Test Your Setup

# Quick test the MCP server
echo '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-06-18","capabilities":{},"clientInfo":{"name":"test","version":"1.0"}}}
{"jsonrpc":"2.0","method":"notifications/initialized","params":{}}
{"jsonrpc":"2.0","id":2,"method":"tools/list","params":{}}' | node dist/index.js

# Run automated tests  
npm test

# Run tests with UI
npm run test:ui

For Claude Desktop Users

Based on the official MCP quickstart guide, Claude Desktop integration follows these steps:

Setup Steps

Complete the basic setup (steps 1-4 from development setup above):
git clone <repository-url> cd basecamp-mcp-server npm install npm run setup # Configure .env file with OAuth credentials npm run auth
Generate Claude Desktop configuration:
npm run config:claude
Restart Claude Desktop completely (quit and reopen the application)
Verify in Claude Desktop:
- Look for the "Search and tools" icon (🔍) in the chat interface
- You should see "basecamp" listed with all 46 tools available
- Toggle the tools on to enable Basecamp integration

Claude Desktop Configuration

The configuration is automatically created at:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Windows: ~/AppData/Roaming/Claude/claude_desktop_config.json
Linux: ~/.config/claude-desktop/claude_desktop_config.json

Example configuration generated:

{
  "mcpServers": {
    "basecamp": {
      "command": "node",
      "args": ["/path/to/your/project/dist/index.js"],
      "env": {
        "BASECAMP_ACCOUNT_ID": "your_account_id"
      }
    }
  }
}

Usage in Claude Desktop

Ask Claude things like:

"What are my current Basecamp projects?"
"Show me the latest campfire messages from the Technology project"
"Create a new card in the Development column with title 'Fix login bug'"
"Get all todo items from the Marketing project"
"Search for messages containing 'deadline'"

Troubleshooting Claude Desktop

Check Claude Desktop logs (following official debugging guide):

# macOS/Linux - Monitor logs in real-time
tail -n 20 -f ~/Library/Logs/Claude/mcp*.log

# Check for specific errors
ls ~/Library/Logs/Claude/mcp-server-basecamp.log

Common issues:

Tools not appearing: Verify configuration file syntax and restart Claude Desktop
Connection failures: Check that Node.js path and script path are absolute paths
Authentication errors: Ensure OAuth flow completed successfully (oauth_tokens.json exists)

Available MCP Tools

Once configured, you can use these tools in Cursor:

get_projects - Get all Basecamp projects
get_project - Get details for a specific project
get_todolists - Get todo lists for a project
get_todos - Get todos from a todo list
search_basecamp - Search across projects, todos, and messages
get_comments - Get comments for a Basecamp item
get_campfire_lines - Get recent messages from a Basecamp campfire
get_daily_check_ins - Get project's daily check-in questions
get_question_answers - Get answers to daily check-in questions
create_attachment - Upload a file as an attachment
get_events - Get events for a recording
get_webhooks - List webhooks for a project
create_webhook - Create a webhook
delete_webhook - Delete a webhook
get_documents - List documents in a vault
get_document - Get a single document
create_document - Create a document
update_document - Update a document
trash_document - Move a document to trash

Card Table Tools

get_card_table - Get the card table details for a project
get_columns - Get all columns in a card table
get_column - Get details for a specific column
create_column - Create a new column in a card table
update_column - Update a column title
move_column - Move a column to a new position
update_column_color - Update a column color
put_column_on_hold - Put a column on hold (freeze work)
remove_column_hold - Remove hold from a column (unfreeze work)
watch_column - Subscribe to notifications for changes in a column
unwatch_column - Unsubscribe from notifications for a column
get_cards - Get all cards in a column
get_card - Get details for a specific card
create_card - Create a new card in a column
update_card - Update a card
move_card - Move a card to a new column
complete_card - Mark a card as complete
uncomplete_card - Mark a card as incomplete
get_card_steps - Get all steps (sub-tasks) for a card
create_card_step - Create a new step (sub-task) for a card
get_card_step - Get details for a specific card step
update_card_step - Update a card step
delete_card_step - Delete a card step
complete_card_step - Mark a card step as complete
uncomplete_card_step - Mark a card step as incomplete

Example Cursor Usage

Ask Cursor things like:

"Show me all my Basecamp projects"
"What todos are in project X?"
"Search for messages containing 'deadline'"
"Get details for the Technology project"
"Show me the card table for project X"
"Create a new card in the 'In Progress' column"
"Move this card to the 'Done' column"
"Update the color of the 'Urgent' column to red"
"Mark card as complete"
"Show me all steps for this card"
"Create a sub-task for this card"
"Mark this card step as complete"

Architecture

The project uses the official @modelcontextprotocol/sdk for maximum reliability and compatibility:

MCP Server (src/index.ts) - Official MCP SDK with 46 tools, compatible with both Cursor and Claude Desktop
OAuth App (src/lib/oauth-app.ts) - Handles OAuth 2.0 flow with Basecamp
Token Storage (src/lib/token-storage.ts) - Securely stores OAuth tokens
Basecamp Client (src/lib/basecamp-client.ts) - Basecamp API client library
Type Definitions (src/types/basecamp.ts) - Complete TypeScript interfaces
Configuration Scripts:
- NPM scripts for setup, authentication, and config generation
- Built-in TypeScript compilation and testing

Troubleshooting

Common Issues (Both Clients)

🔴 Red/Yellow indicator: Run npm run setup to build the project and dependencies
🔴 "0 tools available": Project not built or dependencies missing - run setup script
🔴 "Tool not found" errors: Restart your client (Cursor/Claude Desktop) completely
⚠️ Missing BASECAMP_ACCOUNT_ID: Add to .env file, then re-run the config generator

Quick Fixes

Problem: Server won't start

# Test if MCP server works:
node dist/index.js
# If this fails, run: npm run build

Problem: Wrong Node.js version

node --version  # Must be 18+
# If too old, install newer Node.js and re-run setup

Problem: Authentication fails

# Check OAuth flow:
npm run auth
# Visit http://localhost:8000 and complete login

Manual Configuration (Last Resort)

Cursor config location: ~/.cursor/mcp.json (macOS/Linux) or %APPDATA%\Cursor\mcp.json (Windows)
Claude Desktop config location: ~/Library/Application Support/Claude/claude_desktop_config.json (macOS)

{
    "mcpServers": {
        "basecamp": {
            "command": "node",
            "args": ["/full/path/to/your/project/dist/index.js"],
            "cwd": "/full/path/to/your/project",
            "env": {
                "BASECAMP_ACCOUNT_ID": "your_account_id"
            }
        }
    }
}

Finding Your Account ID

If you don't know your Basecamp account ID:

Log into Basecamp in your browser
Look at the URL - it will be like https://3.basecamp.com/4389629/projects
The number (4389629 in this example) is your account ID

Security Notes

Keep your .env file secure and never commit it to version control
The OAuth tokens are stored locally in oauth_tokens.json
This setup is designed for local development use

Acknowledgments

This TypeScript implementation was inspired by and built upon the excellent foundation provided by the original Python Basecamp MCP Server.

Thank you to the original Python project maintainers for creating a solid foundation that enabled this TypeScript adaptation! 🙏

License

This project is licensed under the MIT License.

This server cannot be installed

security - not tested

license - permissive license

quality - not tested

How are these scores calculated?

hybrid server

The server is able to function both locally and remotely, depending on the configuration or use case.

Enables seamless integration with Basecamp 3 through 46 comprehensive API tools, allowing users to manage projects, todos, card tables, documents, campfire messages, and other Basecamp features through natural language interactions in Claude Desktop and Cursor IDE.

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