{"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":"2026-07-17T00:42:33.372Z","server":{"name":"io.inboxguard/email-deliverability","title":null,"description":"Scan and fix a domain's email deliverability (SPF, DKIM, DMARC, MTA-STS, BIMI, DNS blocklists).","version":"1.2.0","remote_url":"https://mcp.inboxguard.io/mcp","repo_url":null},"operational_grade":{"grade":"A","score":97,"provisional":0,"reachable":1,"auth_state":"open","latency_ms":361,"tool_count":28,"probed_at":"2026-07-15T00:00:35.938Z","evidence":[{"criterion":"reachability","points":25,"max":25,"evidence":"HTTP 200, initialize accepted in 361ms"},{"criterion":"protocol","points":15,"max":15,"evidence":"valid JSON-RPC initialize result, protocolVersion 2025-06-18, serverInfo inboxguard@1.6.0"},{"criterion":"tooling","points":35,"max":35,"evidence":"tools/list OK: 28 tools e.g. \"scan_domain\"; 28/28 described, 28/28 fully-typed schemas, median description 263 chars"},{"criterion":"latency","points":10,"max":10,"evidence":"initialize round-trip 361ms"},{"criterion":"provenance","points":12,"max":15,"evidence":"description present; no repository URL; version 1.2.0; namespace io.inboxguard 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":"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."}