{"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":"2026-07-17T03:25:35.795Z","server":{"name":"io.github.penfieldlabs/penfield-mcp","title":"Penfield Memory","description":"Persistent memory and knowledge graphs for AI agents. Hybrid search, context checkpoints, and more.","version":"1.22.0","remote_url":"https://mcp.penfield.app/","repo_url":"https://github.com/penfieldlabs/penfield-mcp"},"operational_grade":{"grade":"C","score":66,"provisional":1,"reachable":1,"auth_state":"auth-wellbehaved","latency_ms":243,"tool_count":null,"probed_at":"2026-07-14T08:16:03.761Z","evidence":[{"criterion":"reachability","points":18,"max":25,"evidence":"HTTP 401 in 243ms — auth required; WWW-Authenticate present: \"Bearer error=\"invalid_token\", error_description=\"Authentication required\", resource_metadata=\"https://mcp.penfield.app/.\""},{"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":10,"max":10,"evidence":"initialize round-trip 243ms"},{"criterion":"provenance","points":15,"max":15,"evidence":"description present; repository linked; version 1.22.0; namespace io.github.penfieldlabs 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":"unaudited","observations":[],"response_benchmarks":[],"reviewed_field_reports":[],"interpretation":"Dimensions are independent; missing evidence is not a pass; field reports are qualitative, moderated and never votes."}