@flexpa/mcp-fhir

[!WARNING] This is an experimental demo not intended for production use.

This is a TypeScript-based MCP server that connects to a FHIR server. It provides core MCP functionality for interacting with FHIR resources by:

Accessing FHIR resources via URIs
Providing search capabilities for FHIR resources

Features

Resources

[!TIP] "Resources" here refers to the MCP definition not the FHIR one. MCP Resources are a core primitive in the Model Context Protocol (MCP) that allow servers to expose data and content that can be read by clients and used as context for LLM interactions.

List and access FHIR resources via fhir:// URIs
Resources are returned in FHIR JSON format
Supports all FHIR Resource types available in the FHIR server's CapabilityStatement

Tools

search_fhir - Search FHIR resources
- Takes resourceType and searchParams as parameters
- Returns FHIR search results
read_fhir - Read an individual FHIR resource
- Takes uri as a parameter
- Returns the FHIR resource in JSON format

Configuration

The server requires the following environment variables:

FHIR_BASE_URL: The base URL of your FHIR server
FHIR_ACCESS_TOKEN: A SMART on FHIR access token for authentication

Development

Install dependencies:

npm install

Build the server:

npm run build

For development with auto-rebuild:

npm run watch

Installation

To use with Claude Desktop, add the server config:

On MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json On Windows: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "fhir": {
      "command": "/path/to/@flexpa/mcp-fhir/build/index.js"
    },
    "env": {
      "FHIR_BASE_URL": "<FHIR_BASE_URL>",
      "FHIR_ACCESS_TOKEN": "<FHIR_ACCESS_TOKEN>"
    }
  }
}

Debugging

Since MCP servers communicate over stdio, debugging can be challenging. We recommend using the MCP Inspector, which is available as a package script:

npm run inspector

The Inspector will provide a URL to access debugging tools in your browser.

MCP FHIR Server

Integrations