mcp-freshbooks

Production-grade MCP server for FreshBooks — 53 tools for invoices, clients, expenses, payments, time tracking, projects, estimates, financial reports, and smart workflows.

Features

• 53 tools covering the full FreshBooks accounting workflow

• Smart workflow tools — convert estimates to invoices, invoice unbilled time, find overdue clients, get full client summaries

• 5 financial reports — P&L, tax summary, accounts aging, balance sheet, payments collected

• OAuth2 authentication with automatic token refresh

• Clean output — summarized lists, formatted details

• Production-grade error handling and rate limit awareness

• Zero cost — uses FreshBooks free developer program

Tools

Quick Start

1. Install

pip install mcp-freshbooks

Or from source:

git clone https://github.com/AlexlaGuardia/mcp-freshbooks.git
cd mcp-freshbooks
pip install .

2. Get FreshBooks API Credentials

1. Sign up at freshbooks.com/pages/developer-signup

2. Create an OAuth app in the developer portal

3. Set redirect URI to https://localhost:8555/callback

4. Copy your Client ID and Client Secret

3. Configure

export FRESHBOOKS_CLIENT_ID=your_client_id
export FRESHBOOKS_CLIENT_SECRET=your_client_secret
export FRESHBOOKS_REDIRECT_URI=https://localhost:8555/callback

4. Add to Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "freshbooks": {
      "command": "mcp-freshbooks",
      "env": {
        "FRESHBOOKS_CLIENT_ID": "your_client_id",
        "FRESHBOOKS_CLIENT_SECRET": "your_client_secret",
        "FRESHBOOKS_REDIRECT_URI": "https://localhost:8555/callback"
      }
    }
  }
}

5. Authenticate

Use the freshbooks_authenticate tool on first use. It will give you a URL to open in your browser. After authorizing, tokens are saved to ~/.mcp-freshbooks/tokens.json and auto-refresh.

Usage Examples

Who owes me money?

Use get_overdue_invoices to see all past-due clients and total outstanding

Convert a proposal to an invoice:

Use convert_estimate_to_invoice to turn estimate 456 into a ready-to-send invoice

Find unbilled work:

Use get_unbilled_time to find time entries not yet on any invoice

Check profitability:

Get the profit and loss report for Q1 2026

Track time:

Create a 2-hour time entry for project 789 with note "API integration work"

Architecture

src/mcp_freshbooks/
├── server.py   # MCP server with 47 tool definitions
├── client.py   # FreshBooks API client (httpx async)
└── auth.py     # OAuth2 flow + token persistence

The server uses the MCP Python SDK with FastMCP for clean tool registration. All API calls go through the async client with automatic token refresh.

Requirements

• Python 3.10+

• FreshBooks account (free trial works for development)

• FreshBooks OAuth app credentials

License

MIT