Fhirhydrant MCP Server

A modern, fully configurable, open-source Node.js Model Context Protocol (MCP) server for R4+ FHIR APIs. It connects MCP-compatible LLM AI clients to clinical data over SMART on FHIR v2 Backend Services using signed JWT client credentials. Its 7 documented tools cluster into system, capabilities, paginate, operate. It runs locally over stdio via the published package.

People who work with emr, fhir and healthcare ai and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-15 · ★ 17 · #12 OF 71 MAINTAINED SCIENCE & HEALTH · VERIFIED 2026-09-18

NOASSERTION · TypeScript servers · how we verify → /methodology

01 · Install Fhirhydrant

before you install - you'll need

Set MCP_TRANSPORT, FHIR_CLIENT_ID, FHIR_ACTIVE_KEY, FHIR_JWKS_URL, FHIR_AUTH, FHIR_WRITE_CAPABILITIES before connecting. FHIR_BASE_URL, FHIR_SERVER_URL are optional or environment-specific per the README.

Claude Code

claude mcp add faulkj-fhirhydrant -- npx -y fhirhydrant

Claude Desktop / Cursor / VS Code - add to config

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

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license no standard license detected - usage rights unclear; check the repo before commercial use

npm package fhirhydrant - unscoped; check the name against the project README before installing

registry namespace io.github.faulkj is GitHub-verified and matches the repo owner

03 · What Fhirhydrant can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

An agent gets 7 documented tools across system, capabilities, paginate, including system_history, capabilities, paginate, operate.

Capability map

Tools grouped from the project's README - what Fhirhydrant lets an agent do.

System

1 tool - e.g. Server advertises system history interaction and scopes allow it

system_history

Capabilities

1 tool - e.g. Always registered

capabilities

Paginate

1 tool - e.g. Always registered

paginate

Operate

1 tool - e.g. At least one named operation passes gating

operate

Bundle

1 tool - e.g. FHIR_BUNDLE_CAPABILITIES is set

bundle

Terminology

1 tool - e.g. FHIR_TERMINOLOGY_BASE_URL is set

terminology_lookup

Code

1 tool - e.g. FHIR_TERMINOLOGY_BASE_URL is set

code_search

Latest releases

v0.17.3 · 2026-08-27

v0.17.2 · 2026-08-26

v0.17.1 · 2026-08-26

04 · Who maintains Fhirhydrant

fhirhydrant is maintained by faulkj. We track 2 MCP servers from faulkj - 2 actively maintained, 18 combined GitHub stars, oldest repo from Jun 2026.

05 · Facts

repository
github.com/faulkj/fhirhydrant
category
science & health - ranked #12 of 71 actively-maintained science & health servers as of 2026-09-18.
release cadence
10+ releases in the last 90 days (latest 2026-08-27)
registry
io.github.faulkj/fhirhydrant (active, first published 2026-08-26 · 2 versions)
packages
npm:fhirhydrant

06 · Fhirhydrant FAQ

Is Fhirhydrant still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-15 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

What can Fhirhydrant do?

An agent gets 7 documented tools across system, capabilities, paginate, including system_history, capabilities, paginate, operate.

How do I install Fhirhydrant?

Run `npx -y fhirhydrant`. The README documents 8 environment variables (MCP_TRANSPORT, FHIR_BASE_URL, FHIR_CLIENT_ID…) to set first. Set MCP_TRANSPORT, FHIR_CLIENT_ID, FHIR_ACTIVE_KEY, FHIR_JWKS_URL, FHIR_AUTH, FHIR_WRITE_CAPABILITIES before connecting. FHIR_BASE_URL, FHIR_SERVER_URL are optional or environment-specific per the README. You can also paste the ready-made client config above.

Does Fhirhydrant run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Fhirhydrant

Alternatives to Fhirhydrant

Maintained science & health servers if Fhirhydrant isn't the fit.

  1. Arxiv MCP Server (blazickjp) Search arXiv papers, download full text, semantic search, citation graphs, and alerts via MCP. ★ 3,159 · 2026-08-26
  2. Paper Banana Generate academic diagrams and statistical plots from text using multi-agent AI. ★ 2,367 · 2026-09-17
  3. Pyscn Python code analysis for AI agents: complexity, dead code, clones, coupling, and a health score. ★ 1,068 · 2026-09-17
  4. Pubmed MCP Server Search PubMed/Europe PMC, fetch articles and full text (PMC/EPMC/Unpaywall), citations, MeSH terms. ★ 148 · 2026-09-13
  5. FHIR MCP Server MCP server providing seamless access to FHIR APIs for AI tools and healthcare applications ★ 136 · 2026-09-04
  6. Clinicaltrialsgov MCP Server Search ClinicalTrials.gov - find studies, retrieve results, match patients to eligible trials. ★ 94 · 2026-09-13

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