{
    "ok": true,
    "domain": "loc.gov",
    "generated_at": "2026-08-08T17:31:02-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 86,
        "label": "Good",
        "categories": {
            "dns": 95,
            "mail": 70,
            "security": 84,
            "network": 70,
            "availability": 100
        },
        "category_weights": {
            "dns": 25,
            "mail": 20,
            "security": 25,
            "network": 10,
            "availability": 20
        },
        "items": [
            {
                "category": "dns",
                "title": "IPv4 (A)",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0,
                "detail": "2 IPv4 address(es) detected."
            },
            {
                "category": "dns",
                "title": "IPv6 (AAAA)",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0,
                "detail": "2 IPv6 address(es) detected."
            },
            {
                "category": "dns",
                "title": "Name server redundancy",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0,
                "detail": "2 NS record(s); 2 or more required."
            },
            {
                "category": "dns",
                "title": "SOA record",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0,
                "detail": "Authoritative zone record."
            },
            {
                "category": "dns",
                "title": "DNSSEC chain",
                "max_points": 15,
                "earned_points": 15,
                "lost_points": 0,
                "detail": "DS and DNSKEY detected."
            },
            {
                "category": "dns",
                "title": "CAA policy",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5,
                "detail": "Certificate authority restriction."
            },
            {
                "category": "dns",
                "title": "DNS propagation",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0,
                "detail": "Agreement between public resolvers."
            },
            {
                "category": "mail",
                "title": "MX records",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0,
                "detail": "2 MX record(s)."
            },
            {
                "category": "mail",
                "title": "SPF",
                "max_points": 25,
                "earned_points": 25,
                "lost_points": 0,
                "detail": "SPF policy published."
            },
            {
                "category": "mail",
                "title": "DMARC",
                "max_points": 25,
                "earned_points": 25,
                "lost_points": 0,
                "detail": "DMARC policy published."
            },
            {
                "category": "mail",
                "title": "DKIM",
                "max_points": 20,
                "earned_points": 0,
                "lost_points": 20,
                "detail": "No tested DKIM selector responded."
            },
            {
                "category": "mail",
                "title": "MTA-STS",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5,
                "detail": "Mail transport policy."
            },
            {
                "category": "mail",
                "title": "TLS-RPT",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5,
                "detail": "TLS reporting policy."
            },
            {
                "category": "security",
                "title": "Valid TLS certificate",
                "max_points": 55,
                "earned_points": 55,
                "lost_points": 0,
                "detail": "75 day(s) remaining."
            },
            {
                "category": "security",
                "title": "Certificate lifetime",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0,
                "detail": "Full points require at least 30 days remaining."
            },
            {
                "category": "security",
                "title": "HTTP security headers",
                "max_points": 35,
                "earned_points": 19,
                "lost_points": 16,
                "detail": "5 of 9 evaluated headers detected."
            },
            {
                "category": "network",
                "title": "PTR reverse DNS",
                "max_points": 30,
                "earned_points": 0,
                "lost_points": 30,
                "detail": "PTR not detected."
            },
            {
                "category": "network",
                "title": "IPv4 diversity",
                "max_points": 35,
                "earned_points": 35,
                "lost_points": 0,
                "detail": "Two or more IPv4 addresses receive full points."
            },
            {
                "category": "network",
                "title": "IPv6 connectivity",
                "max_points": 35,
                "earned_points": 35,
                "lost_points": 0,
                "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",
                "max_points": 40,
                "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."
            }
        ],
        "methodology": "Each category is normalized to 100. The total is the weighted sum: DNS 25%, Email 20%, Security 25%, Network 10%, Availability 20%.",
        "diagnostics": [
            {
                "level": "ok",
                "title": "IPv4 (A)",
                "detail": "2 IPv4 address(es) detected.",
                "category": "dns",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "IPv6 (AAAA)",
                "detail": "2 IPv6 address(es) detected.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "Name server redundancy",
                "detail": "2 NS record(s); 2 or more required.",
                "category": "dns",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "SOA record",
                "detail": "Authoritative zone record.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "DNSSEC chain",
                "detail": "DS and DNSKEY detected.",
                "category": "dns",
                "max_points": 15,
                "earned_points": 15,
                "lost_points": 0
            },
            {
                "level": "error",
                "title": "CAA policy",
                "detail": "Certificate authority restriction.",
                "category": "dns",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5
            },
            {
                "level": "ok",
                "title": "DNS propagation",
                "detail": "Agreement between public resolvers.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "MX records",
                "detail": "2 MX record(s).",
                "category": "mail",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "SPF",
                "detail": "SPF policy published.",
                "category": "mail",
                "max_points": 25,
                "earned_points": 25,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "DMARC",
                "detail": "DMARC policy published.",
                "category": "mail",
                "max_points": 25,
                "earned_points": 25,
                "lost_points": 0
            },
            {
                "level": "error",
                "title": "DKIM",
                "detail": "No tested DKIM selector responded.",
                "category": "mail",
                "max_points": 20,
                "earned_points": 0,
                "lost_points": 20
            },
            {
                "level": "error",
                "title": "MTA-STS",
                "detail": "Mail transport policy.",
                "category": "mail",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5
            },
            {
                "level": "error",
                "title": "TLS-RPT",
                "detail": "TLS reporting policy.",
                "category": "mail",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5
            },
            {
                "level": "ok",
                "title": "Valid TLS certificate",
                "detail": "75 day(s) remaining.",
                "category": "security",
                "max_points": 55,
                "earned_points": 55,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "Certificate lifetime",
                "detail": "Full points require at least 30 days remaining.",
                "category": "security",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0
            },
            {
                "level": "warning",
                "title": "HTTP security headers",
                "detail": "5 of 9 evaluated headers detected.",
                "category": "security",
                "max_points": 35,
                "earned_points": 19,
                "lost_points": 16
            },
            {
                "level": "error",
                "title": "PTR reverse DNS",
                "detail": "PTR not detected.",
                "category": "network",
                "max_points": 30,
                "earned_points": 0,
                "lost_points": 30
            },
            {
                "level": "ok",
                "title": "IPv4 diversity",
                "detail": "Two or more IPv4 addresses receive full points.",
                "category": "network",
                "max_points": 35,
                "earned_points": 35,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "IPv6 connectivity",
                "detail": "AAAA availability.",
                "category": "network",
                "max_points": 35,
                "earned_points": 35,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "DNS resolution",
                "detail": "At least one address family must resolve.",
                "category": "availability",
                "max_points": 40,
                "earned_points": 40,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "HTTP response",
                "detail": "HTTP/2 200 ",
                "category": "availability",
                "max_points": 40,
                "earned_points": 40,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "HTTPS final URL",
                "detail": "Final URL uses HTTPS.",
                "category": "availability",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0
            }
        ]
    },
    "dns": {
        "records": {
            "A": [
                "104.18.64.82",
                "104.17.6.58"
            ],
            "AAAA": [
                "2606:4700::6811:63a",
                "2606:4700::6812:4052"
            ],
            "CNAME": [],
            "MX": [
                "10 mxb-00026101.gslb.gpphosted.com.",
                "10 mxa-00026101.gslb.gpphosted.com."
            ],
            "TXT": [
                "\"webexdomainverification.NQCL=b1bef083-e011-4dcf-b1f7-42204b82128e\"",
                "\"ZA=NzrYbQCQ4geLYL//TYHmJA==\"",
                "\"google-site-verification=D5cqNFQ7z5rT2z4OXeYRmxrMc80omDUqEGtsNFY9N_g\"",
                "\"538fe1481176c669d55eb1a37227bd0a3ccfb28d6a2838429e59f504dc3070d3\"",
                "\"MS=ms90737861\"",
                "\"yTrNm8yrlLjz94UZ1A2UUPz7Gv5UfCIypoGH1HmXjNs=\"",
                "\"62QSYa/kfNXdxXnLjT9/ZOyvqed/KSL3dFy+b7K7EFS08xeEY8vGX0IT9BCOCvkgLa16BcrmaQhTgKeOMK6njA==\"",
                "\"v=spf1 include:spf1.loc.gov include:spf2.loc.gov include:spf-00026101.gpphosted.com mx -all\"",
                "\"google-site-verification=o0tsBc2NuJSImRS3MromAcC8lwoaWNp5LFZlmJXB0-0\"",
                "\"adobe-idp-site-verification=02f02861-90f5-4cf5-9922-c67c80a7bf26\"",
                "\"e9af54f5-6e02-4c11-84a3-ab9d25e7b454\"",
                "\"atlassian-domain-verification=nWInaz9qwixZxg4Ef5K7jmsSKDAlta15azD9kOFROWwn8xjciPtK3MK4SUFB1R1/\""
            ],
            "NS": [
                "alice.ns.cloudflare.com.",
                "kevin.ns.cloudflare.com."
            ],
            "SOA": [
                "alice.ns.cloudflare.com. dns.cloudflare.com. 2411593402 10000 2400 604800 1800"
            ],
            "CAA": [],
            "DS": [
                "2371 13 2 C975D3D3F2857C9EFB6D1F5313B06528E1FE8908CAB6E82C5C02C462 875BF27E"
            ],
            "DNSKEY": [
                "256 3 13 oJMRESz5E4gYzS/q6XDrvU1qMPYIjCWzJaOau8XNEZeqCYKD5ar0IRd8 KqXXFJkqmVfRvMGPmM1x8fGAa2XhSA==",
                "257 3 13 mdsswUyr3DPW132mOi8V9xESWE8jTo0dxCjjnopKl+GqJxpVXckHAeF+ KkxLbxILfDLUT0rAK9iUzy1L53eKGQ=="
            ],
            "RRSIG": [
                "DNSKEY 13 2 3600 20260928200705 20260729200705 2371 loc.gov. lOCt3yP0VjkTdU3xGsfWmyO34th8YxXhm/p0X+AePQ4oTwZ55FwEwj3J DhHmUkDLAHzNOT2FtSLgcOpuZbQIxA==",
                "NS 13 2 86400 20260809233050 20260807213050 34505 loc.gov. 2WBlB4H7ur2ctC7qLYqcbQYNNfmA0UvwFO/o6yRn6MQyywMTYnmBnYZd b8hkleOE1C1cvlUSB9QgZsLcSIOSWg==",
                "MX 13 2 300 20260809233050 20260807213050 34505 loc.gov. s77GP32J6DL/rmLGGtRPpJzUVRxpyUf/crV3o+xkUd6paTBkdPZYrPTE BBKKc9CaAA/nOYtoZDozXkLlc2bB6Q==",
                "AAAA 13 2 300 20260809233050 20260807213050 34505 loc.gov. nVY0nJgGMTr3+ZlE0750HAWibgaX2rW+tfKesx58AxgvkzcoYNL6XyMG 56bU5BTrAbwv6Fy/5+5OEHsf/t1KBQ==",
                "A 13 2 300 20260809233050 20260807213050 34505 loc.gov. j4Uwh/XB7AFOrn17w3jlld6z3+iIomyNcQmnYoccZckos/ujpuwX54VR NDgqHU4aKacFM64iU239NF72kyh4mA==",
                "DS 13 2 3600 20260809233050 20260807213050 35496 gov. U9U3zZ9+zF3Fi62k4PNw43KnpN42DkDqalxwfY52HXMRtj++qsCbeeLI v9w110Y8pUiXUJBtes2zuVH4rrmUww=="
            ],
            "NSEC": [
                "\\000.loc.gov. A NS SOA PTR HINFO MX TXT AAAA LOC SRV NAPTR CERT SSHFP RRSIG NSEC DNSKEY TLSA SMIMEA HIP CDS CDNSKEY OPENPGPKEY SVCB HTTPS URI CAA"
            ],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "104.18.64.82",
            "104.17.6.58"
        ],
        "ipv6": [
            "2606:4700::6811:63a",
            "2606:4700::6812:4052"
        ]
    },
    "mail": {
        "spf": "v=spf1 include:spf1.loc.gov include:spf2.loc.gov include:spf-00026101.gpphosted.com mx -all",
        "dmarc": "v=DMARC1;p=none;sp=none;fo=1;rua=mailto:locdmarc_reports@loc.gov;ruf=mailto:locdmarc_ruf@loc.gov;rf=afrf;pct=100",
        "dkim_selector": "x",
        "dkim_host": "",
        "dkim": "",
        "spf_analysis": {
            "valid": true,
            "lookups": 4,
            "final": "-all",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "none"
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": ""
    },
    "advanced": {
        "ptr": "",
        "propagation": {
            "consistent": true,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "104.17.6.58",
                        "104.18.64.82"
                    ],
                    "time_ms": 75.42
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
                        "104.17.6.58",
                        "104.18.64.82"
                    ],
                    "time_ms": 46.14
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "104.17.6.58",
                        "104.18.64.82"
                    ],
                    "time_ms": 52.45
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "104.17.6.58",
                        "104.18.64.82"
                    ],
                    "time_ms": 58.28
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
                        "104.17.6.58",
                        "104.18.64.82"
                    ],
                    "time_ms": 50.29
                }
            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "Let's Encrypt",
        "subject": "loc.gov",
        "valid_from": "2026-07-25T07:21:02-05:00",
        "valid_to": "2026-10-23T07:21:01-05:00",
        "days_remaining": 75,
        "san": [
            "*.loc.gov",
            "*.stage.time.loc.gov",
            "*.time.loc.gov",
            "loc.gov"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_256_GCM_SHA384"
    },
    "http": {
        "url": "https://www.loc.gov/",
        "status": "HTTP/2 200 ",
        "http_version": "3",
        "headers": {
            "date": "Sat, 08 Aug 2026 22:30:53 GMT",
            "content-type": "text/html; charset=UTF-8",
            "content-length": "80264",
            "location": "https://www.loc.gov/",
            "access-control-allow-origin": "*",
            "referrer-policy": "no-referrer-when-downgrade",
            "strict-transport-security": "max-age=3600; preload",
            "x-content-type-options": "nosniff",
            "x-frame-options": "sameorigin",
            "age": "2924",
            "expires": "Sat, 08 Aug 2026 22:12:54 GMT",
            "content-security-policy": "block-all-mixed-content;         default-src https://loc.gov/ https://*.loc.gov/ ;         media-src https://loc.gov/ https://*.loc.gov/              https://*.readspeaker.com/             https://*.arcgis.com/ https://*.arcgisonline.com/  https://webapps-cdn.esri.com/             blob:;         worker-src https://loc.gov/ https://*.loc.gov/              blob:;         font-src https://loc.gov/ https://*.loc.gov/              https://*.arcgis.com/ https://*.arcgisonline.com/  https://webapps-cdn.esri.com/             https://ssl.p.jwpcdn.com/             data:;         img-src https://loc.gov/ https://*.loc.gov/              https://congress.gov/ https://*.congress.gov/             https://*.readspeaker.com/             https://*.arcgis.com/ https://*.arcgisonline.com/  https://webapps-cdn.esri.com/             https://*.ssa.gov/             https://dpm.demdex.net/             https://cm.everesttech.net/             https://*.amazonaws.com             data:             blob:;         connect-src https://loc.gov/ https://*.loc.gov/              https://*.arcgis.com/ https://*.arcgisonline.com/  https://webapps-cdn.esri.com/             https://chat-us.libanswers.com/             https://thelibraryofcongress.tt.omtrdc.net/             https://dpm.demdex.net/ \t        https://d3c605m4lmznjl.cloudfront.net/             https://*.s3.us-east-1.amazonaws.com/;         style-src https://loc.gov/ https://*.loc.gov/              https://*.readspeaker.com/             https://*.arcgis.com/ https://*.arcgisonline.com/  https://webapps-cdn.esri.com/             https://ssl.p.jwpcdn.com/             https://assets.adobedtm.com/             https://*.ssa.gov/             'unsafe-inline'             blob:;         script-src https://loc.gov/ https://*.loc.gov/              https://*.readspeaker.com/             https://*.arcgis.com/ https://*.arcgisonline.com/  https://webapps-cdn.esri.com/             https://cdn.jsdelivr.net             https://ssl.p.jwpcdn.com/             https://assets.adobedtm.com/             https://*.blackbaudcdn.net/ https://*.blackbaud.com/             https://ajax.googleapis.com/ajax/libs/jquery/             https://*.ssa.gov/             https://s.ytimg.com/             'unsafe-inline'             'unsafe-eval';         frame-src https://loc.gov/ https://*.loc.gov/              https://*.readspeaker.com/             https://*.blackbaudcdn.net/ https://*.blackbaud.com/             https://www.nlstalkingbooks.org/             https://unitedstateslibraryofcongress.demdex.net             https://www.youtube-nocookie.com/;         frame-ancestors https://loc.gov/ https://*.loc.gov/              https://*.blackbaudcdn.net/ https://*.blackbaud.com/             https://loc.libwizard.com/;         report-uri https://errorlogging.loc.gov/api/51/security/?sentry_key=2176ae0b9acd4cd59297edc0e064cc95&sentry_environment=production ;",
            "x-grace": "none",
            "x-nearside-cache": "HIT",
            "x-nearside-cache-hits": "125",
            "cache-control": "no-transform, max-age=3600",
            "cf-cache-status": "HIT",
            "server": "cloudflare",
            "cf-ray": "a281f7da7f061470-STL",
            "etag": "\"f593cfbb874e518ebd4f600e60298150\"",
            "accept-ranges": "bytes"
        },
        "security_checks": {
            "strict-transport-security": true,
            "content-security-policy": true,
            "x-content-type-options": true,
            "x-frame-options": true,
            "referrer-policy": true,
            "permissions-policy": false,
            "cross-origin-opener-policy": false,
            "cross-origin-embedder-policy": false,
            "cross-origin-resource-policy": false
        },
        "server": "cloudflare",
        "powered_by": ""
    },
    "webpage": {
        "url": "https://www.loc.gov/",
        "title": "Home | Library of Congress",
        "description": "The world's largest library. View historic photos, maps, books and more. Contact experts for help with research. Plan a visit. Home of U.S. Copyright Office.",
        "success": true,
        "error": "",
        "status": 206
    },
    "network": {
        "104.18.64.82": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        },
        "104.17.6.58": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        }
    },
    "smtp": {
        "host": "mxb-00026101.gslb.gpphosted.com",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 28.6,
                "banner": "",
                "error": "Connection refused"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 4062.7,
                "banner": "",
                "error": "Connection timed out"
            },
            {
                "port": 587,
                "open": false,
                "time_ms": 4008.4,
                "banner": "",
                "error": "Connection timed out"
            }
        ]
    },
    "visitor": {
        "ip": "216.73.217.62",
        "reverse": "",
        "country": "",
        "country_code": "",
        "region": "",
        "city": "",
        "latitude": null,
        "longitude": null,
        "isp": "",
        "organization": "",
        "asn": "",
        "timezone": "",
        "browser": "Other",
        "os": "Other",
        "language": "",
        "user_agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
        "is_bot": true,
        "cloudflare": false
    },
    "analysis_time_ms": 94.18
}