io.github.faulkj/fhirhydrant

io.github.faulkj/fhirhydrant

FHIR MCP server with SMART Backend Services, response compaction, FHIRPath, and guarded writes.

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Connect this server

Add this to your MCP client config — claude_desktop_config.json (Claude Desktop) or .cursor/mcp.json (Cursor).Suits: Claude Desktop · Cursor.

{
  "mcpServers": {
    "fhirhydrant": {
      "command": "npx",
      "args": [
        "-y",
        "fhirhydrant@0.17.3"
      ],
      "env": {
        "MCP_TRANSPORT": "<your MCP_TRANSPORT>",
        "FHIR_AUTH": "<your FHIR_AUTH>",
        "FHIR_SERVER_URL": "<your FHIR_SERVER_URL>",
        "FHIR_ACTIVE_KEY": "<your FHIR_ACTIVE_KEY>",
        "FHIR_VERSION": "R4"
      }
    }
  }
}
Environment variables
  • MCP_TRANSPORTrequiredRun the installed package over MCP stdio.
  • FHIR_AUTHrequiredFHIR authentication mode. Use none only for an unauthenticated FHIR endpoint.
  • FHIR_SERVER_URLrequiredFull base URL of the FHIR API, such as https://fhir.example.org/fhir/R4.
  • FHIR_ACTIVE_KEYsecretBase64-encoded PKCS#8 private signing key. Required when FHIR_AUTH=smart.
  • FHIR_VERSIONFHIR release used for FHIRPath and response shaping.

A starting point — check the repository for exact arguments and setup. Restart your client after editing the config.

Category
Developer Tools
Version
0.17.3
Registry
active
Published
8/27/2026

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