{"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":"2026-10-26T17:13:30.939Z","server":{"name":"io.usefulapi/referral-rock","title":"Referral Rock MCP by usefulapi","description":"Read Referral Rock programs, members, referrals, rewards and payouts; add members and referrals.","version":"1.1.0","remote_url":"https://referral-rock.usefulapi.io/mcp","repo_url":"https://github.com/m190/usefulapi-mcp"},"operational_grade":{"grade":"A","score":97,"provisional":0,"reachable":1,"auth_state":"open","latency_ms":514,"tool_count":15,"probed_at":"2026-10-25T10:01:00.450Z","evidence":[{"criterion":"reachability","points":25,"max":25,"evidence":"HTTP 200, initialize accepted in 514ms"},{"criterion":"protocol","points":15,"max":15,"evidence":"valid JSON-RPC initialize result, protocolVersion 2025-06-18, serverInfo referral-rock-mcp@1.1.1"},{"criterion":"tooling","points":35,"max":35,"evidence":"tools/list OK: 15 tools e.g. \"referralrock_list_programs\"; 15/15 described, 15/15 fully-typed schemas, median description 262 chars"},{"criterion":"latency","points":7,"max":10,"evidence":"initialize round-trip 514ms"},{"criterion":"provenance","points":15,"max":15,"evidence":"description present; repository linked; version 1.1.0; namespace io.usefulapi 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":"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":"2026-10-25T10:01:00.450Z","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."}