Fitbit MCP Server

Fitbit MCP Connector for AI

Connect AI assistants to your Fitbit health data

Give your AI assistant access to your Fitbit data for personalized health insights, trend analysis, and automated tracking. Works with Claude Desktop and other MCP-compatible AI tools.

What it does

🏃 Exercise & Activities - Get detailed workout logs and activity data
😴 Sleep Analysis - Retrieve sleep patterns and quality metrics
⚖️ Weight Tracking - Access weight trends over time
❤️ Heart Rate Data - Monitor heart rate patterns and zones
🍎 Nutrition Logs - Review food intake, calories, and macros
👤 Profile Info - Access basic Fitbit profile details

Ask your AI things like: "Show me my sleep patterns this week" or "What's my average heart rate during workouts?"

Quick Start

🚀 Want to test the tools right away?

Option 1: Install from npm (Recommended)

Get Fitbit API credentials
- Create an app with OAuth 2.0 Application Type: Personal
- Set Callback URL: http://localhost:3000/callback
- Note your Client ID and Client Secret
Install the package globally:

npm install -g mcp-fitbit

Add to your Claude Desktop config file:

{
  "mcpServers": {
    "fitbit": {
      "command": "mcp-fitbit",
      "args": [],
      "env": {
        "FITBIT_CLIENT_ID": "your_client_id_here",
        "FITBIT_CLIENT_SECRET": "your_client_secret_here"
      }
    }
  }
}

Config file location:
- Windows: %AppData%\Claude\claude_desktop_config.json
- macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
- Linux: ~/.config/Claude/claude_desktop_config.json

Restart Claude Desktop and ask about your Fitbit data!

Option 2: Development Setup

Get Fitbit API credentials (see Installation below)
Then run:

git clone https://github.com/TheDigitalNinja/mcp-fitbit
cd mcp-fitbit
npm install
# Create .env with your Fitbit credentials
npm run dev

Both options open the MCP Inspector at http://localhost:5173 where you can test all tools interactively and handle the OAuth flow.

Installation

For End Users (npm package)

Get Fitbit API credentials at dev.fitbit.com
- Set OAuth 2.0 Application Type to Personal
- Set Callback URL to http://localhost:3000/callback
Install the package:
npm install -g mcp-fitbit
Create .env file in the package directory:When you run mcp-fitbit for the first time, it will tell you exactly where to create the .env file. It will look something like:
C:\Users\YourName\AppData\Roaming\npm\node_modules\mcp-fitbit\.env
Add your credentials to the .env file:
FITBIT_CLIENT_ID=your_client_id_here FITBIT_CLIENT_SECRET=your_client_secret_here
Run the server:
mcp-fitbit

For Developers (from source)

Get Fitbit API credentials at dev.fitbit.com
- Set OAuth 2.0 Application Type to Personal
- Set Callback URL to http://localhost:3000/callback
Clone and setup:
git clone https://github.com/TheDigitalNinja/mcp-fitbit cd mcp-fitbit npm install
Create .env file:
FITBIT_CLIENT_ID=your_client_id_here FITBIT_CLIENT_SECRET=your_client_secret_here
Build the server:
npm run build

Available Tools

Tool	Description	Parameters
`get_weight`	Weight data over time periods	`period`: `1d`, `7d`, `30d`, `3m`, `6m`, `1y`
`get_sleep_by_date_range`	Sleep logs for date range (max 100 days)	`startDate`, `endDate` (YYYY-MM-DD)
`get_exercises`	Activity/exercise logs after date	`afterDate` (YYYY-MM-DD), `limit` (1-100)
`get_daily_activity_summary`	Daily activity summary with goals	`date` (YYYY-MM-DD)
`get_activity_goals`	User's activity goals (daily/weekly)	`period`: `daily`, `weekly`
`get_activity_timeseries`	Activity time series data (max 30 days)	`resourcePath`, `startDate`, `endDate` (YYYY-MM-DD)
`get_azm_timeseries`	Active Zone Minutes time series (max 1095 days)	`startDate`, `endDate` (YYYY-MM-DD)
`get_heart_rate`	Heart rate for time period	`period`: `1d`, `7d`, `30d`, `1w`, `1m`, optional `date`
`get_heart_rate_by_date_range`	Heart rate for date range (max 1 year)	`startDate`, `endDate` (YYYY-MM-DD)
`get_food_log`	Complete nutrition data for a day	`date` (YYYY-MM-DD or "today")
`get_nutrition`	Individual nutrient over time	`resource`, `period`, optional `date`
`get_nutrition_by_date_range`	Individual nutrient for date range	`resource`, `startDate`, `endDate`
`get_profile`	User profile information	None

Nutrition resources: caloriesIn, water, protein, carbs, fat, fiber, sodium

Activity time series resources: steps, distance, calories, activityCalories, caloriesBMR, tracker/activityCalories, tracker/calories, tracker/distance

Claude Desktop

Using npm package (recommended):

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "fitbit": {
      "command": "mcp-fitbit",
      "args": []
    }
  }
}

Using local development version:

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "fitbit": {
      "command": "node",
      "args": ["C:\\path\\to\\mcp-fitbit\\build\\index.js"]
    }
  }
}

Config file locations:

Windows: %AppData%\Claude\claude_desktop_config.json
macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Linux: ~/.config/Claude/claude_desktop_config.json

First Run Authorization

When you first ask your AI assistant to use Fitbit data:

The server opens your browser to http://localhost:3000/auth
Log in to Fitbit and grant permissions
You'll be redirected to a success page
Your AI can now access your Fitbit data!

Development

npm run lint          # Check code quality
npm run format        # Fix formatting
npm run build         # Compile TypeScript
npm run dev           # Run with MCP inspector

Architecture: See TASKS.md for improvement opportunities and technical details.

You must be authenticated.

security – no known vulnerabilities

license - permissive license

quality - confirmed to work

local-only server

The server can only run on the client's local machine because it depends on local resources.

Tools

A Model Context Protocol server that bridges LLMs (like Claude) with the Fitbit API, allowing the LLM to request and retrieve user health and fitness data through defined tools.

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