🌾 Harvest MCP Server

Unofficial Model Context Protocol (MCP) server for seamless integration with the Harvest time tracking API

⚠️ Disclaimer: This is an unofficial, third-party integration with the Harvest API. This project is not affiliated with, endorsed by, or sponsored by Harvest or Forecast (the company behind Harvest).

✨ Features

• 🔗 Complete Harvest API v2 Coverage - 40+ tools covering all major endpoints

• 🛡️ Type-Safe - Full TypeScript support with Zod validation

• ⚡ High Performance - Built with async/await and proper rate limiting

• 🧪 Thoroughly Tested - Comprehensive unit, integration, and contract tests

• 📊 Rich Logging - Structured logging for debugging and monitoring

• 🔄 Auto-Retry - Intelligent retry logic with exponential backoff

• 📖 MCP Compliant - Works with Claude Desktop and other MCP clients

🚀 Quick Start

Prerequisites

• Node.js 18+

• Harvest account with API access

• MCP-compatible client (like Claude Desktop)

Installation

# Install globally
npm install -g @ianaleck/harvest-mcp-server

# Or install locally
npm install @ianaleck/harvest-mcp-server

Configuration

1. Get your Harvest API credentials:

   • Go to Harvest → Settings → Developers → Personal Access Tokens

   • Create a new token

   • Note your Account ID (visible in URL or settings)

2. Configure your MCP client (e.g., Claude Desktop):

{
  "mcpServers": {
    "harvest": {
      "command": "npx",
      "args": ["-y", "@ianaleck/harvest-mcp-server"],
      "env": {
        "HARVEST_ACCESS_TOKEN": "your_harvest_personal_access_token",
        "HARVEST_ACCOUNT_ID": "your_harvest_account_id"
      }
    }
  }
}

3. Start using with Claude!

🎯 What You Can Do

Once connected, you can ask Claude to help with:

⏱️ Time Tracking

• "Show me all my time entries for this week"

• "Start a timer for the 'Development' task on the 'Website Project'"

• "How many hours did I work on Project X last month?"

📋 Project Management

• "List all active projects for client Acme Corp"

• "Create a new project called 'Mobile App' for client TechStart"

• "Show me project budget vs actual time spent"

👥 Team Management

• "Who are all the users in our Harvest account?"

• "Show me John's time entries for last week"

💰 Financial Tracking

• "Generate an expense report for Q4"

• "Show me all unpaid invoices"

• "What's our total billable hours this month?"

🛠️ Available Tools

• get_company - Get company information and settings

• list_time_entries - List time entries with filtering

• get_time_entry - Get specific time entry details

• create_time_entry - Create new time entry

• update_time_entry - Update existing time entry

• delete_time_entry - Delete time entry

• start_timer - Start a timer for a task

• stop_timer - Stop running timer

• restart_timer - Restart a previous time entry

• list_projects - List all projects with filtering

• get_project - Get specific project details

• create_project - Create new project

• update_project - Update project details

• delete_project - Delete project

• list_project_task_assignments - List task assignments for project

• create_project_task_assignment - Assign task to project

• update_project_task_assignment - Update task assignment

• delete_project_task_assignment - Remove task assignment

• list_tasks - List all tasks

• get_task - Get specific task details

• create_task - Create new task

• update_task - Update task details

• delete_task - Delete task

• list_clients - List all clients

• get_client - Get specific client details

• create_client - Create new client

• update_client - Update client details

• delete_client - Delete client

• list_users - List all users in account

• get_user - Get specific user details

• get_current_user - Get current authenticated user

• create_user - Create new user

• update_user - Update user details

• delete_user - Delete user

• list_expenses - List expenses with filtering

• get_expense - Get specific expense details

• create_expense - Create new expense

• update_expense - Update expense details

• delete_expense - Delete expense

• list_expense_categories - List all expense categories

• list_invoices - List invoices with filtering

• get_invoice - Get specific invoice details

• create_invoice - Create new invoice

• update_invoice - Update invoice details

• delete_invoice - Delete invoice

• list_estimates - List estimates with filtering

• get_estimate - Get specific estimate details

• create_estimate - Create new estimate

• update_estimate - Update estimate details

• delete_estimate - Delete estimate

• get_time_report - Generate time reports with filtering

• get_expense_report - Generate expense reports

• get_project_budget_report - Get project budget analysis

• get_uninvoiced_report - Get uninvoiced time and expenses

🧪 Development

Setup

git clone https://github.com/ianaleck/harvest-mcp-server.git
cd harvest-mcp-server
npm install

Environment Configuration

cp .env.example .env
# Edit .env with your Harvest API credentials

Testing

# Run all tests
npm test

# Run with coverage
npm run test:coverage

# Run specific test suites
npm run test:unit
npm run test:integration
npm run test:contract

Building

# Build for production
npm run build

# Start development server
npm run dev

📋 API Requirements

This server requires a Harvest account with API access. Users must comply with:

• Harvest API Terms of Service

• Harvest API Rate Limits (100 requests per 15 seconds)

🤝 Contributing

We welcome contributions! Please see our Contributing Guidelines for details.

1. Fork the repository

2. Create a feature branch (git checkout -b feature/amazing-feature)

3. Make your changes with tests

4. Ensure all tests pass (npm test)

5. Commit your changes (git commit -m 'Add amazing feature')

6. Push to the branch (git push origin feature/amazing-feature)

7. Open a Pull Request

📄 License

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

🙏 Acknowledgments

• Harvest for providing an excellent time tracking API

• Model Context Protocol team for the MCP specification

• Anthropic for Claude and the MCP SDK

📞 Support

• 🐛 Bug Reports: GitHub Issues

• 💡 Feature Requests: GitHub Discussions

• 📖 Documentation: MCP Documentation

Made with ❤️ for the MCP community

⭐ Star this project if you find it useful!