Fhirhydrant MCP Server

What the code does

We read the source, 2 d ago · rules ccca72095570

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

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import { existsSync, readdirSync } from "fs";

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add fhirhydrant -- npx -y fhirhydrant

{
  "mcpServers": {
    "fhirhydrant": {
      "args": [
        "-y",
        "fhirhydrant"
      ],
      "command": "npx"
    }
  }
}

[mcp_servers.fhirhydrant]
command = "npx"
args = ["-y", "fhirhydrant"]

{
  "mcpServers": {
    "fhirhydrant": {
      "args": [
        "-y",
        "fhirhydrant"
      ],
      "command": "npx"
    }
  }
}

{
  "mcpServers": {
    "fhirhydrant": {
      "args": [
        "-y",
        "fhirhydrant"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: MCP_TRANSPORT (Run the installed package over MCP stdio.), FHIR_AUTH (FHIR authentication mode. Use none only for an unauthenticated FHIR endpoint.), FHIR_SERVER_URL (Full base URL of the FHIR API, such as https://fhir.example.org/fhir/R4.), FHIR_TOKEN_URL (SMART Backend Services token endpoint. Required when FHIR_AUTH=smart unless it can be derived from FHIR_BASE_URL.), FHIR_CLIENT_ID (SMART Backend Services client ID. Required when FHIR_AUTH=smart.), FHIR_ACTIVE_KEY (Base64-encoded PKCS#8 private signing key. Required when FHIR_AUTH=smart.), FHIR_JWKS_URL (Externally reachable JWKS URL for the signing key. Recommended for SMART authentication over stdio.), FHIR_VERSION (FHIR release used for FHIRPath and response shaping.). The author declared them in the registry entry; get the values from the project itself.