{
    "ok": true,
    "domain": "tucows.com",
    "generated_at": "2026-08-09T08:30:05-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 76,
        "label": "Good",
        "categories": {
            "dns": 70,
            "mail": 90,
            "security": 73,
            "network": 20,
            "availability": 100
        },
        "category_weights": {
            "dns": 25,
            "mail": 20,
            "security": 25,
            "network": 10,
            "availability": 20
        },
        "items": [
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                "category": "dns",
                "title": "IPv4 (A)",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0,
                "detail": "1 IPv4 address(es) detected."
            },
            {
                "category": "dns",
                "title": "IPv6 (AAAA)",
                "max_points": 10,
                "earned_points": 0,
                "lost_points": 10,
                "detail": "0 IPv6 address(es) detected."
            },
            {
                "category": "dns",
                "title": "Name server redundancy",
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                "earned_points": 20,
                "lost_points": 0,
                "detail": "3 NS record(s); 2 or more required."
            },
            {
                "category": "dns",
                "title": "SOA record",
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                "detail": "Authoritative zone record."
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                "category": "dns",
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                "category": "dns",
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            },
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                "category": "mail",
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                "earned_points": 20,
                "lost_points": 0,
                "detail": "1 MX record(s)."
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                "category": "mail",
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                "earned_points": 25,
                "lost_points": 0,
                "detail": "SPF policy published."
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                "category": "mail",
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                "category": "mail",
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                "detail": "Mail transport policy."
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                "category": "mail",
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                "earned_points": 0,
                "lost_points": 5,
                "detail": "TLS reporting policy."
            },
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                "category": "security",
                "title": "Valid TLS certificate",
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                "earned_points": 55,
                "lost_points": 0,
                "detail": "33 day(s) remaining."
            },
            {
                "category": "security",
                "title": "Certificate lifetime",
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            },
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                "category": "security",
                "title": "HTTP security headers",
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                "lost_points": 27,
                "detail": "2 of 9 evaluated headers detected."
            },
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                "category": "network",
                "title": "PTR reverse DNS",
                "max_points": 30,
                "earned_points": 0,
                "lost_points": 30,
                "detail": "PTR not detected."
            },
            {
                "category": "network",
                "title": "IPv4 diversity",
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                "earned_points": 20,
                "lost_points": 15,
                "detail": "Two or more IPv4 addresses receive full points."
            },
            {
                "category": "network",
                "title": "IPv6 connectivity",
                "max_points": 35,
                "earned_points": 0,
                "lost_points": 35,
                "detail": "AAAA availability."
            },
            {
                "category": "availability",
                "title": "DNS resolution",
                "max_points": 40,
                "earned_points": 40,
                "lost_points": 0,
                "detail": "At least one address family must resolve."
            },
            {
                "category": "availability",
                "title": "HTTP response",
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                "earned_points": 40,
                "lost_points": 0,
                "detail": "HTTP/2 200 "
            },
            {
                "category": "availability",
                "title": "HTTPS final URL",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0,
                "detail": "Final URL uses HTTPS."
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        ],
        "methodology": "Each category is normalized to 100. The total is the weighted sum: DNS 25%, Email 20%, Security 25%, Network 10%, Availability 20%.",
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                "detail": "1 IPv4 address(es) detected.",
                "category": "dns",
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                "lost_points": 0
            },
            {
                "level": "error",
                "title": "IPv6 (AAAA)",
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                "category": "dns",
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                "earned_points": 0,
                "lost_points": 10
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            },
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                "level": "ok",
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                "lost_points": 0
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                "level": "ok",
                "title": "DKIM",
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                "category": "mail",
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                "lost_points": 0
            },
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                "level": "error",
                "title": "MTA-STS",
                "detail": "Mail transport policy.",
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                "level": "ok",
                "title": "Certificate lifetime",
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                "earned_points": 10,
                "lost_points": 0
            },
            {
                "level": "warning",
                "title": "HTTP security headers",
                "detail": "2 of 9 evaluated headers detected.",
                "category": "security",
                "max_points": 35,
                "earned_points": 8,
                "lost_points": 27
            },
            {
                "level": "error",
                "title": "PTR reverse DNS",
                "detail": "PTR not detected.",
                "category": "network",
                "max_points": 30,
                "earned_points": 0,
                "lost_points": 30
            },
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                "level": "warning",
                "title": "IPv4 diversity",
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                "category": "network",
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                "earned_points": 20,
                "lost_points": 15
            },
            {
                "level": "error",
                "title": "IPv6 connectivity",
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                "lost_points": 35
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            {
                "level": "ok",
                "title": "DNS resolution",
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                "max_points": 40,
                "earned_points": 40,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "HTTP response",
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                "earned_points": 40,
                "lost_points": 0
            },
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                "level": "ok",
                "title": "HTTPS final URL",
                "detail": "Final URL uses HTTPS.",
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                "max_points": 20,
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                "lost_points": 0
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            "RRSIG": [],
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            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
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            "SSHFP": []
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        "ipv6": []
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            "cross-origin-embedder-policy": false,
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            "organization": "",
            "isp": ""
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