{"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":"2026-07-21T09:31:58.167Z","server":{"name":"com.ppn-hub/ppn-hub","title":"PPN Hub — public APIs over MCP","description":"One MCP endpoint over 75 public PPN APIs: search_apis to discover, execute_api to call. Free tier.","version":"1.2.0","remote_url":"https://mcp.ppn-hub.com/mcp","repo_url":null},"operational_grade":{"grade":"A","score":91,"provisional":0,"reachable":1,"auth_state":"open","latency_ms":847,"tool_count":3,"probed_at":"2026-07-20T07:00:22.316Z","evidence":[{"criterion":"reachability","points":25,"max":25,"evidence":"HTTP 200, initialize accepted in 847ms"},{"criterion":"protocol","points":15,"max":15,"evidence":"valid JSON-RPC initialize result, protocolVersion 2025-06-18, serverInfo ppn-mcp-gateway@1.2.0"},{"criterion":"tooling","points":32,"max":35,"evidence":"tools/list OK: 3 tools e.g. \"search_apis\"; 3/3 described, 2/3 fully-typed schemas, median description 232 chars"},{"criterion":"latency","points":7,"max":10,"evidence":"initialize round-trip 847ms"},{"criterion":"provenance","points":12,"max":15,"evidence":"description present; no repository URL; version 1.2.0; namespace com.ppn-hub 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":"security","metric":"sensitive_capabilities_declared","status":"concern","value_text":"execute_api","evidence":"1 discovered tool(s) advertise potentially state-changing or privileged capabilities. Tool names: execute_api. Classification is description-based and does not prove exploitability.","source_type":"live_probe","sample_size":1,"observed_at":"2026-07-20T07:00:22.316Z","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":"2026-07-20T07:00:22.316Z","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."}