Renpho MCP Server

A Model Context Protocol (MCP) server that provides access to body composition data from Renpho smart scales. Query your weight, body fat, muscle mass, and other health metrics directly from Claude, Cursor, or any MCP-compatible client.

Features

Body Composition Data: Weight, BMI, body fat %, muscle mass, water %, bone mass, visceral fat, metabolic age, BMR, and more
Weight Trends: Track changes over customizable time periods (7-365 days)
Health Classifications: Automatic BMI, body fat, and visceral fat category assessments
Measurement History: Access historical measurements with date filtering
Multi-table discovery: Scans all linked Renpho scale tables instead of assuming the first discovered scale-user ID is always correct
Sync diagnostics: Inspect linked scale-user IDs, hidden measurements, and likely delayed Wi-Fi sync situations
Secure: Credentials stored as environment variables, never logged

Requirements

Node.js 18+
A Renpho Health account with connected smart scale
Important: This works with the Renpho Health app (blue icon), not the legacy Renpho app

Installation

git clone https://github.com/StartupBros/renpho-mcp-server.git
cd renpho-mcp-server
npm install
npm run build

Configuration

Create a .env file (or set environment variables):

[email protected]
RENPHO_PASSWORD=your-password

Claude Code

Add to your MCP settings (~/.claude/settings.json or project .claude/settings.json):

{
  "mcpServers": {
    "renpho": {
      "command": "node",
      "args": ["/path/to/renpho-mcp-server/dist/index.js"],
      "env": {
        "RENPHO_EMAIL": "[email protected]",
        "RENPHO_PASSWORD": "your-password"
      }
    }
  }
}

Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "renpho": {
      "command": "node",
      "args": ["/path/to/renpho-mcp-server/dist/index.js"],
      "env": {
        "RENPHO_EMAIL": "[email protected]",
        "RENPHO_PASSWORD": "your-password"
      }
    }
  }
}

Available Tools

Tool	Description
`get_latest_measurement`	Most recent body composition reading selected for the current user
`get_body_composition`	Detailed composition with health classifications
`get_weight_trend`	Weight change analysis over N days
`get_measurements`	Historical measurements with date filtering
`get_current_user`	User profile information
`get_scale_users`	Linked scale-user IDs and Renpho table mappings
`get_sync_diagnostics`	Debug hidden/delayed measurements across linked scale users
`refresh_data`	Clear caches and force a fresh Renpho session
`health_check`	Verify API connection status

Example Usage

Once configured, ask Claude:

"What's my current weight and body composition?"
"Show my weight trend over the last 90 days"
"How has my body fat percentage changed this year?"
"Get my last 10 measurements"
"Show my Renpho scale user IDs"
"Run sync diagnostics for the last 7 days"
"Refresh Renpho data and re-check my latest measurement"

Technical Notes

Uses the Renpho Health API (cloud.renpho.com), not the legacy API
Implements AES-128-ECB encryption for API communication
Handles JavaScript BigInt precision for large user IDs
Scans all discovered Renpho scale tables and scale-user IDs before selecting measurements for the current user
Includes a sync diagnostics tool to surface measurements associated with linked scale users but not currently selected for the logged-in user
Caches authentication tokens (50 min) and measurements (5 min) to reduce API calls

Known Wi-Fi Scale Sync Caveat

Some Wi-Fi scales appear to upload measurements that are not immediately bound to the expected Renpho user until the mobile app performs additional sync logic. This server now helps debug that state with get_scale_users, get_sync_diagnostics, and refresh_data, but the exact server-side binding call used by the app is still being investigated.

Privacy

Credentials are only used to authenticate with Renpho's API
No data is stored permanently or sent to third parties
All communication uses HTTPS

Credits

API reverse engineering based on RenphoGarminSync-CLI by forkerer.

License

MIT

Renpho MCP Server