{"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":"2026-08-14T15:50:13.167Z","server":{"name":"co.addcal/addcal","title":"AddCal","description":"Publish public calendars and events others subscribe to: RSVPs, feeds and add-to-calendar links.","version":"1.0.1","remote_url":"https://addcal.co/mcp","repo_url":"https://github.com/addcal/mcp"},"operational_grade":{"grade":"C","score":62,"provisional":1,"reachable":1,"auth_state":"auth-wellbehaved","latency_ms":891,"tool_count":null,"probed_at":"2026-08-14T13:15:38.066Z","evidence":[{"criterion":"reachability","points":18,"max":25,"evidence":"HTTP 401 in 891ms — auth required; WWW-Authenticate present: \"Bearer realm=\"mcp\", resource_metadata=\"https://addcal.co/.well-known/oauth-protected-resource/mcp\"\""},{"criterion":"protocol","points":0,"max":15,"evidence":"handshake not reachable behind auth — unverified"},{"criterion":"tooling","points":0,"max":0,"evidence":"auth-gated — tooling unverifiable, excluded from score (grade marked provisional)"},{"criterion":"latency","points":7,"max":10,"evidence":"initialize round-trip 891ms"},{"criterion":"provenance","points":15,"max":15,"evidence":"description present; repository linked; version 1.0.1; namespace co.addcal matches endpoint/repo"}],"protocol_access":"auth-wellbehaved"},"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":"security","metric":"authentication_boundary","status":"observed","value_text":"auth-wellbehaved","evidence":"Live protocol probe observed auth_state=auth-wellbehaved. This describes discovery/access behavior; it is not by itself a vulnerability finding.","source_type":"live_probe","sample_size":null,"observed_at":"2026-08-14T13:15:38.066Z","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."}