{"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":"2026-09-10T23:01:34.557Z","server":{"name":"co.callendar/mcp","title":"Callendar","description":"WhatsApp® reminders and rescheduling for Calendly. Public read-only MCP endpoint.","version":"1.0.0","remote_url":"https://app.callendar.de/mcp","repo_url":null},"operational_grade":{"grade":"F","score":5,"provisional":0,"reachable":0,"auth_state":"unreachable","latency_ms":140,"tool_count":null,"probed_at":"2026-09-05T21:30:36.173Z","evidence":[{"criterion":"reachability","points":0,"max":25,"evidence":"HTTP 404 in 140ms — no valid initialize result"},{"criterion":"protocol","points":0,"max":15,"evidence":"no handshake"},{"criterion":"tooling","points":0,"max":35,"evidence":"unreachable — no tooling to assess"},{"criterion":"latency","points":0,"max":10,"evidence":"not measurable"},{"criterion":"provenance","points":5,"max":15,"evidence":"description present; no repository URL; version 1.0.0; namespace co.callendar does NOT match remote host (expected *.callendar.co)"}],"protocol_access":"unreachable"},"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":"unreachable","evidence":"Live protocol probe observed auth_state=unreachable. This describes discovery/access behavior; it is not by itself a vulnerability finding.","source_type":"live_probe","sample_size":null,"observed_at":"2026-09-05T21:30:36.173Z","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."}