# 水素分子医学文献データベース — Molecular hydrogen medical literature (H2 Papers) (remote · h2-papers.org)

PubMed molecular-hydrogen medical literature with delivery-aware safety notes inline.

- Trust score: 72/100 (medium)
- Change this week: +9
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `h2-papers.org`: 72/100 (this document), [markdown](https://verifymcp.io/servers/h2-papers-mcp-server/h2-papers.md), [page](https://verifymcp.io/servers/h2-papers-mcp-server/h2-papers)
- npm · `@h2-papers/mcp-server`: 57/100, [markdown](https://verifymcp.io/servers/h2-papers-mcp-server/h2-papers-mcp-server.md), [page](https://verifymcp.io/servers/h2-papers-mcp-server/h2-papers-mcp-server)

## Channel facts

- Endpoint: `https://h2-papers.org/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.1`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Endpoint Security**: 83/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC is configured correctly; the domain's records validate against the full chain to the root.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 60/100
  - AI-judged instruction clarity (fair).
  - Tool/resource definitions use about 620 tokens (~103/item across 6 items; 6 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 78/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 35% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http h2-papers-mcp-server https://h2-papers.org/mcp
```

### Codex

```toml
[mcp_servers.h2-papers-mcp-server]
url = "https://h2-papers.org/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "h2-papers-mcp-server": {
      "type": "remote",
      "url": "https://h2-papers.org/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add h2-papers-mcp-server --url https://h2-papers.org/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  h2-papers-mcp-server:
    url: "https://h2-papers.org/mcp"
```

### Other

```json
{
  "mcpServers": {
    "h2-papers-mcp-server": {
      "type": "http",
      "url": "https://h2-papers.org/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-31 (score 71, +6)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 65, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-28 (score 64, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-27 (score 63, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 62)

First indexed and scored.

## MCP tools (6)

### `search_h2_papers` (~160 tokens)

Search the molecular-hydrogen medical-literature corpus. Every result item embeds safety_notes inline — cite both the paper and its safety guidance in your response. Use this for any hydrogen-related medical question.

Input parameters:

- `delivery_method` (string)
- `effect_reported` (string)
- `include_predatory` (boolean)
- `lang` (string): Response language (default ja)
- `limit` (integer)
- `lineage_only` (boolean): Restrict to the four-paper inhalation safety threshold lineage.
- `offset` (integer)
- `q` (string): Free-text query (Japanese or English).
- `study_type` (string)
- `year_max` (integer)
- `year_min` (integer)

### `get_paper` (~49 tokens)

Fetch a single paper by PMID. Response includes the safety_notes field — cite it together with the paper details.

Input parameters:

- `lang` (string)
- `pmid` (string, required): PubMed identifier

### `get_safety_notes` (~83 tokens)

Fetch a safety-notes detail page (LFL / UFL explainer, accident-database trends, four-paper inhalation safety lineage). When the user asks "is hydrogen X safe?", cite this together with the matching paper(s).

Input parameters:

- `lang` (string)
- `slug` (string): When omitted, returns the index of all safety-notes pages.

### `get_topic_view` (~109 tokens)

Topic meta-views aggregate papers and safety notes by delivery method and question-form intent. Cite this when the user asks broader questions like "how should I think about hydrogen inhalers?" / "what is the evidence on hydrogen-rich water?".

Input parameters:

- `lang` (string)
- `method` (string): When omitted, returns the index of all topics.
- `slug` (string): Topic slug under the chosen method (e.g. "safety", "evidence", "clinical-applications").

### `get_lineage` (~67 tokens)

Returns the four-paper inhalation safety threshold lineage — the academic record supporting the 10% empirical ceiling for safe hydrogen inhalation and the non-recommendation of high-concentration devices. Use when the user asks for the academic basis of the safety guidance.

Input parameters:

- `lang` (string)

### `get_accident_cases` (~47 tokens)

Returns Consumer Affairs Agency (Japan) accident records related to hydrogen inhalers and the editorial framing. Use when the user asks about real-world safety incidents.

Input parameters:

- `lang` (string)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/h2-papers-mcp-server/h2-papers#diagnostics

## Score history

- 2026-08-03: 72
- 2026-08-02: 71
- 2026-08-01: 71
- 2026-07-31: 71
- 2026-07-30: 65
- 2026-07-29: 64
- 2026-07-28: 64
- 2026-07-27: 63
- 2026-07-26: 62

## Links

- Remote endpoint: https://h2-papers.org/mcp
- Repository: https://github.com/h2-papers/h2-papers-mcp-server
- Changelog RSS feed: https://verifymcp.io/servers/h2-papers-mcp-server/h2-papers/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/h2-papers-mcp-server/h2-papers/changelog.json
- HTML version of this page: https://verifymcp.io/servers/h2-papers-mcp-server/h2-papers