ICF MCP Server (Cloudflare Workers)

A Model Context Protocol (MCP) server for the WHO International Classification of Functioning, Disability and Health (ICF), deployed on Cloudflare Workers for global edge availability.

Live URL: https://mcp-icf.medseal.app/mcp

What is ICF?

The ICF is a WHO classification that complements ICD (diagnosis codes) by describing how health conditions affect a person's functioning in daily life:

• Body Functions (b) - Physiological and psychological functions
• Body Structures (s) - Anatomical parts of the body
• Activities and Participation (d) - Task execution and life involvement
• Environmental Factors (e) - Physical, social, and attitudinal environment

Tool

A single icf tool with action dispatch (token-efficient). 19 actions:

Codes & Hierarchy

Qualifiers

Clinical Assessment Instruments

11 standardized RPM instruments with items, scoring, and ICF mappings: GAD-7, PHQ-9, RADAI-5, SLEDAI-2K, WHODAS 2.0, HAQ-DI, PROMIS-10, CAT, ODI, NRS Pain, Short FES-I.

Meta

Example call:

{"action": "score", "name": "GAD-7", "responses": [1, 2, 1, 0, 1, 2, 1]}

Instrument and qualifier actions are pure logic and work without WHO API credentials; code/hierarchy actions require them.

Prerequisites

1. WHO ICD-API credentials (free): Register at https://icd.who.int/icdapi
2. Cloudflare account with Workers enabled
3. Node.js 18+ and npm

Installation

git clone https://github.com/stayce/icf-mcp-cloudflare.git
cd icf-mcp-cloudflare
npm install

Configuration

1. Copy the example environment file:

   bash

   Copy

   cp .dev.vars.example .dev.vars
   

2. Edit .dev.vars with your WHO API credentials for local development.

3. For production, set secrets:

   Terminal

   Copy

   wrangler secret put WHO_CLIENT_ID
   wrangler secret put WHO_CLIENT_SECRET
   

Development

npm run dev

The server will be available at http://localhost:8787.

Testing

npm test

Regression tests cover instrument scoring (all 11 instruments) and qualifier parsing — pure logic, no WHO API credentials needed.

Deployment

npm run deploy

For custom domain (configured in wrangler.toml):

wrangler deploy --env production

Usage with Claude

Add to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{
  "mcpServers": {
    "icf": {
      "type": "url",
      "url": "https://mcp-icf.medseal.app/mcp"
    }
  }
}

Or if deploying your own:

{
  "mcpServers": {
    "icf": {
      "type": "url",
      "url": "https://your-worker.workers.dev/mcp"
    }
  }
}

Endpoints

• / or /health - Health check / server info
• /mcp - MCP protocol endpoint (streamable HTTP)

API Reference

This server uses the WHO ICD-API which provides programmatic access to both ICD-11 and ICF classifications.

• API Documentation: https://icd.who.int/docs/icd-api/APIDoc-Version2/
• ICF Browser: https://icd.who.int/dev11/l-icf/en

License

MIT License - see LICENSE

Related

• icf-mcp-server - Python version for Claude Desktop