{
  "name": "H2Medicine",
  "language": "en",
  "url": "https://h2medicine.org",
  "other_language_url": "https://h2medizin.org",
  "description": "Scientific evidence overview of molecular hydrogen (H₂) in humans — not medical advice. Null and negative results are included.",
  "total": 731,
  "human": 212,
  "therapeutic": 144,
  "by_evidence_level": {
    "1": 350,
    "2": 148,
    "3": 64,
    "4": 169
  },
  "endpoints": {
    "meta": {
      "url": "https://h2medicine.org/api/meta.json",
      "description": "This manifest: facets, field definitions, notes"
    },
    "catalog": {
      "url": "https://h2medicine.org/api/catalog.json",
      "description": "Compact catalog of all studies (single fetch)"
    },
    "full": {
      "url": "https://h2medicine.org/api/studies.json",
      "description": "Full dataset incl. summary, abstract, conclusion, assessment"
    },
    "graph": {
      "url": "https://h2medicine.org/api/graph.json",
      "description": "Compact concept map: indication↔method co-occurrence (for the map view)"
    },
    "llms": {
      "url": "https://h2medicine.org/llms.txt",
      "description": "Guide for LLM crawlers (llmstxt.org)"
    }
  },
  "fields": {
    "pmid": "PubMed ID (primary key)",
    "year": "Publication year",
    "title": "Study title (localized: German on h2medizin.org, English here)",
    "title_en": "English title (present on the German site — for language-neutral search / canonical)",
    "title_de": "German title (present on the English site — for language-neutral search)",
    "journal": "Journal",
    "authors": "Author byline (e.g. \"LeBaron et al.\")",
    "author_search": "Searchable lead (first) author surname (also spaced, e.g. \"Le Baron\")",
    "doi": "DOI",
    "doi_url": "Resolvable DOI link",
    "pubmed": "PubMed record (URL)",
    "url": "Canonical study page on this domain",
    "methods": "H₂ delivery method(s)",
    "indications": "conditions / topics studied",
    "evidence_level": "Evidence level 1 (highest) to 4 (lowest, e.g. hypothesis/review)",
    "human": "true = human study",
    "therapeutic": "true = therapeutic H₂ administration in humans",
    "h2category": "Classification of the study’s relation to H₂"
  },
  "facets": {
    "indications": [
      {
        "key": "oxidative-stress",
        "count": 356
      },
      {
        "key": "immune-system",
        "count": 254
      },
      {
        "key": "cancer",
        "count": 169
      },
      {
        "key": "sports-exercise",
        "count": 162
      },
      {
        "key": "neurology",
        "count": 140
      },
      {
        "key": "cardiovascular",
        "count": 131
      },
      {
        "key": "respiratory",
        "count": 102
      },
      {
        "key": "skin-aging",
        "count": 102
      },
      {
        "key": "liver",
        "count": 98
      },
      {
        "key": "other",
        "count": 92
      },
      {
        "key": "metabolic",
        "count": 87
      },
      {
        "key": "fundamentals-safety",
        "count": 57
      },
      {
        "key": "joints-rheumatology",
        "count": 37
      },
      {
        "key": "diabetes",
        "count": 36
      },
      {
        "key": "kidney-dialysis",
        "count": 35
      },
      {
        "key": "fundamentals",
        "count": 19
      },
      {
        "key": "eye",
        "count": 17
      },
      {
        "key": "womens-health",
        "count": 14
      },
      {
        "key": "allergy",
        "count": 13
      },
      {
        "key": "oral-health",
        "count": 9
      },
      {
        "key": "pregnancy",
        "count": 9
      },
      {
        "key": "mechanism",
        "count": 3
      }
    ],
    "methods": [
      {
        "key": "inhalation",
        "count": 248
      },
      {
        "key": "unspecified",
        "count": 234
      },
      {
        "key": "drinking-hrw",
        "count": 191
      },
      {
        "key": "saline-iv",
        "count": 66
      },
      {
        "key": "bath-topical",
        "count": 32
      },
      {
        "key": "tablets",
        "count": 4
      }
    ],
    "h2category": [
      {
        "key": "preclinical",
        "count": 350
      },
      {
        "key": "review",
        "count": 169
      },
      {
        "key": "therapy",
        "count": 144
      },
      {
        "key": "breath-test",
        "count": 29
      },
      {
        "key": "tracer-clearance",
        "count": 28
      },
      {
        "key": "byproduct",
        "count": 11
      }
    ]
  },
  "labels": {
    "indications": {
      "diabetes": "Diabetes",
      "metabolic": "Metabolic",
      "liver": "Liver",
      "neurology": "Neurology / Brain",
      "cardiovascular": "Cardiovascular",
      "cancer": "Cancer / Oncology",
      "oxidative-stress": "Oxidative stress",
      "immune-system": "Immune system",
      "eye": "Eye",
      "joints-rheumatology": "Joints / Rheumatology",
      "respiratory": "Respiratory / Lung",
      "skin-aging": "Skin / Aging",
      "fundamentals-safety": "Fundamentals / Safety",
      "kidney-dialysis": "Kidney / Dialysis",
      "fundamentals": "Fundamentals",
      "womens-health": "Women's health",
      "sports-exercise": "Sports / Performance",
      "allergy": "Allergy",
      "oral-health": "Oral health",
      "other": "Other",
      "pregnancy": "Pregnancy",
      "mechanism": "Mechanism of action"
    },
    "methods": {
      "inhalation": "Inhalation (H₂ gas)",
      "unspecified": "Unspecified",
      "saline-iv": "Saline i.v.",
      "drinking-hrw": "Hydrogen-rich water (drinking)",
      "bath-topical": "Bath / topical",
      "tablets": "Tablets / Magnesium"
    }
  },
  "usage": "Static JSON files, no authentication, CORS open. To filter, fetch the catalog (index.json) and filter client-side by indications/methods/evidence_level/human. Structured tool queries via the MCP server are coming."
}