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io.github.stayce/icf-mcp

WHO ICF classification codes for health and disability. Lookup, search, browse via WHO API.

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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

Tools

Tool	Description
`icf_lookup`	Look up a specific ICF code (e.g., `b280`, `d450`)
`icf_search`	Search by keyword (e.g., "walking difficulty", "pain")
`icf_browse_category`	Browse top-level categories: `b`, `s`, `d`, `e`
`icf_get_children`	Get subcategories of a code
`icf_explain_qualifier`	Explain severity ratings (0-4, 8, 9)
`icf_overview`	Full ICF classification overview

Prerequisites

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

Installation

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

Configuration

Copy the example environment file:
```
cp .dev.vars.example .dev.vars
```
Edit .dev.vars with your WHO API credentials for local development.

For production, set secrets:

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.

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

icf-mcp-server - Python version for Claude Desktop