{"attribution":"MCP Queen — the evidence layer for MCP (https://mcpqueen.com)","license":"CC BY 4.0 — free to use with attribution and a link to mcpqueen.com","methodology":"https://mcpqueen.com/registry#methodology","docs":"https://mcpqueen.com/api","generated_at":"2026-10-23T08:05:42.783Z","server":{"name":"com.hydrogenstudies/research","title":"Hydrogen Studies","description":"Search, compare and summarize 2,200+ published studies on molecular hydrogen (H2) and health.","version":"1.1.0","remote_url":"https://hydrogenstudies.com/mcp","repo_url":null},"operational_grade":{"grade":"A","score":97,"provisional":0,"reachable":1,"auth_state":"open","latency_ms":287,"tool_count":8,"probed_at":"2026-10-23T02:46:01.124Z","evidence":[{"criterion":"reachability","points":25,"max":25,"evidence":"HTTP 200, initialize accepted in 287ms"},{"criterion":"protocol","points":15,"max":15,"evidence":"valid JSON-RPC initialize result, protocolVersion 2025-06-18, serverInfo hydrogen-studies@1.0.0"},{"criterion":"tooling","points":35,"max":35,"evidence":"tools/list OK: 8 tools e.g. \"search_studies\"; 8/8 described, 8/8 fully-typed schemas, median description 201 chars"},{"criterion":"latency","points":10,"max":10,"evidence":"initialize round-trip 287ms"},{"criterion":"provenance","points":12,"max":15,"evidence":"description present; no repository URL; version 1.1.0; namespace com.hydrogenstudies matches endpoint/repo"}],"protocol_access":"open"},"field_semantics":{"auth_state":"Deprecated name retained for compatibility. It means protocol handshake/discovery access only, not tool-level data entitlement.","protocol_access":"Preferred name for auth_state."},"audit_state":"observations_published","observations":[{"dimension":"citation_quality","metric":"citation_capability_advertised","status":"unverified","value_text":null,"evidence":"Metadata/tool descriptions advertise citation or evidence capability: get_study Full record for one study: citation, design, population, H2 protocol (delivery, concentration, dosage), outcome, our plain-language summary and key finding, limitations, quality score with red fl | Accepts an id, slug, DOI or study URL. No response-level citation benchmark has verified this claim yet.","source_type":"live_probe","sample_size":null,"observed_at":"2026-10-23T02:46:01.124Z","methodology_version":"trust-v1"},{"dimension":"security","metric":"authentication_boundary","status":"observed","value_text":"open","evidence":"Live protocol probe observed auth_state=open. This describes discovery/access behavior; it is not by itself a vulnerability finding.","source_type":"live_probe","sample_size":null,"observed_at":"2026-10-23T02:46:01.124Z","methodology_version":"trust-v1"}],"response_benchmarks":[],"reviewed_field_reports":[],"interpretation":"Dimensions are independent; missing evidence is not a pass; field reports are qualitative, moderated and never votes."}