# Expect-CT Present

Matches records that have a value in webdata.http.headers.expect_ct.

Source: https://docs.deepinfo.com/reference/discovery/domain-search/examples/webdata-http-headers-expect-ct/

Last updated: 2026-09-26

---
`POST https://api.deepinfo.com/v1/discovery/domain-search?page_size=25`

Example 25 of 40 in **Filters › Webdata & HTTP** · [Domain Search Examples](/reference/discovery/domain-search/examples/) · endpoint: [Domain Search](/reference/discovery/domain-search/)

Tags: `field` `webdata.http.headers.expect_ct` · `operator` `exists`

Matches records that have a value in `webdata.http.headers.expect_ct`.

In the response, look at `results[].webdata.http.headers.expect_ct`.

## Request

| Parameter | In | Value |
|---|---|---|
| `page_size` | query | `25` |
| `filters.must[0].name` | body | `webdata.http.headers.expect_ct` |
| `filters.must[0].type` | body | `exists` |
| `filters.must[0].value` | body | `true` |

```bash
curl -X POST 'https://api.deepinfo.com/v1/discovery/domain-search?page_size=25' \
  -H 'apikey: YOUR_API_KEY' \
  -H 'Accept: application/json' \
  -H 'Content-Type: application/json' \
  -d '{
  "filters": {
    "must": [
      {
        "name": "webdata.http.headers.expect_ct",
        "type": "exists",
        "value": true
      }
    ]
  }
}'
```

## Response

### 200 · OK

> Shortened for this page: results: 3 of 25 shown; results[].domain.ip_history: first 10 items; results[].ip_history: first 10 items; results[].webdata.http.headers.others: first 10 items

`Content-Type: application/json` · `ratelimit-limit: 1000` · `ratelimit-remaining: 999` · `ratelimit-reset: 1` · `x-ratelimit-limit-hour: 100000` · `x-ratelimit-limit-minute: 10000` · `x-ratelimit-limit-second: 1000` · `x-ratelimit-remaining-hour: 99865` · `x-ratelimit-remaining-minute: 9994` · `x-ratelimit-remaining-second: 999` · `deepinfo-request-id: 5f0c6a8e-1b2d-4c3e-9f4a-7b8c9d0e1f2a`

```json
{
  "page": 1,
  "page_size": 25,
  "result_count": 7416729,
  "results": [
    {
      "punycode": "betterthanoriginal.com",
      "unicode": "betterthanoriginal.com",
      "is_idn": false,
      "subdomain": null,
      "subdomain_last": null,
      "subdomain_root": null,
      "name": {
        "punycode": "betterthanoriginal",
        "unicode": "betterthanoriginal",
        "is_idn": false,
        "contains_letter": true,
        "contains_number": false,
        "contains_hyphen": false,
        "length": 18,
        "lang": "en",
        "keywords": [
          "better",
          "than",
          "original"
        ],
        "keyword_count": 3,
        "latinized": [],
        "contains_confusable": false
      },
      "domain": {
        "punycode": "betterthanoriginal.com",
        "unicode": "betterthanoriginal.com",
        "is_idn": false,
        "name": {
          "punycode": "betterthanoriginal",
          "unicode": "betterthanoriginal",
          "is_idn": false,
          "contains_letter": true,
          "contains_number": false,
          "contains_hyphen": false,
          "length": 18,
          "lang": "en",
          "keywords": [
            "better",
            "than",
            "original"
          ],
          "keyword_count": 3
        },
        "extension": {
          "punycode": "com",
          "unicode": "com",
          "is_idn": false
        },
        "extension_root": {
          "punycode": "com",
          "unicode": "com",
          "is_idn": false
        },
        "extension_sub": null,
        "extension_type": 1,
        "reserved": null,
        "premium": null,
        "registered": true,
        "whois": {
          "create_date": "2011-09-02T18:01:22Z",
          "update_date": "2026-09-03T13:30:49Z",
          "expiry_date": "2027-09-02T18:01:22Z",
          "registrar": "wild west domains, llc",
          "registrant": {
            "name": null,
            "organization": null,
            "street": null,
            "city": null,
            "state": null,
            "postal_code": null,
            "country": null,
            "phone": null,
            "email": null
          },
          "name_servers": [
            "nsg1.namebrightdns.com",
            "nsg2.namebrightdns.com"
          ],
          "domain_status": [
            "clientdeleteprohibited",
            "clientrenewprohibited",
            "clienttransferprohibited",
            "clientupdateprohibited"
          ],
          "whois_server": "whois.wildwestdomains.com",
          "check_date": "2026-09-03T16:32:49Z"
        },
        "whois_normalized": {
          "registrant": null
        },
        "whois_last_check_date": "2026-09-03T16:32:49Z",
        "whois_create_date_historical": [
          "2011-09-02T18:01:22Z"
        ],
        "whois_last_change_date": "2026-09-03T16:35:47Z",
        "whois_registrant_email_historical": [
          "select contact domain holder link at https://www.secureserver.net/whois?plid=1387&domain=betterthanoriginal.com",
          "user@hugedomains.com",
          "https://www.secureserver.net/whois?plid=1387&domain=betterthanoriginal.com&action=contactdomainowner"
        ],
        "whois_privacy_enabled": null,
        "dns": {
          "a": {
            "update_date": "2026-09-03T12:13:10Z",
            "ip_addresses": []
          }
        },
        "dns_last_change_date": "2026-06-05T23:26:10Z",
        "ip_history": [
          "3.223.115.185",
          "3.130.204.160",
          "3.130.253.23",
          "34.205.242.146",
          "54.161.222.85",
          "18.119.154.66",
          "3.140.13.188",
          "3.94.41.167",
          "52.86.6.113",
          "3.18.7.81"
        ],
        "ssl": null,
        "ssl_last_change_date": null
      },
      "type": 1,
      "subdomain_level_count": 0,
      "dns": {
        "a": {
          "update_date": "2026-09-03T12:13:10Z",
          "ip_addresses": []
        },
        "aaaa": {
          "update_date": "2026-09-03T12:13:10Z",
          "ip_addresses": []
        },
        "ns": {
          "update_date": "2026-09-03T12:13:10Z",
          "name_servers": [
            "ns1.namebrightdns.com",
            "ns2.namebrightdns.com"
          ]
        },
        "mx": {
          "update_date": "2026-09-03T12:13:10Z",
          "mail_servers": []
        },
        "soa": {
          "update_date": "2026-09-03T12:13:10Z",
          "mnames": [],
          "rnames": [],
          "rname_emails": []
        },
        "txt": {
          "update_date": "2026-09-03T12:13:10Z",
          "values": []
        },
        "cname": {
          "update_date": "2026-09-03T12:13:10Z",
          "values": []
        },
        "others": []
      },
      "dns_last_change_date": "2026-06-05T23:26:08Z",
      "ip_history": [
        "3.223.115.185",
        "3.130.204.160",
        "3.130.253.23",
        "34.205.242.146",
        "54.161.222.85",
        "18.119.154.66",
        "3.140.13.188",
        "3.94.41.167",
        "52.86.6.113",
        "3.18.7.81"
      ],
      "ssl": null,
      "ssl_last_change_date": null,
      "webdata": {
        "connection_status": "success",
        "html": {
          "source_code_hash": "02242b065d77ed2c43f3eeff20904124378dce0b228fe0c182459b59bb34977b"
        },
        "http": {
          "status_code_first": 302,
          "status_code_last": 200,
          "redirection_history": [
            {
              "url": "http://betterthanoriginal.com/",
              "status_code": 302
            },
            {
              "url": "https://www.hugedomains.com/domain_profile.cfm?d=betterthanoriginal.com",
              "status_code": 200
            }
          ],
          "external_redirection": true,
          "final_url": "https://www.hugedomains.com/domain_profile.cfm?d=betterthanoriginal.com",
          "final_fqdn": "www.hugedomains.com",
          "final_domain": "hugedomains.com",
          "headers": {
            "others": [
              {
                "name": "date",
                "value": "Sun, 19 Jun 2022 07:24:12 GMT"
              },
              {
                "name": "transfer_encoding",
                "value": "chunked"
              },
              {
                "name": "connection",
                "value": "keep-alive"
              },
              {
                "name": "vary",
                "value": "Accept-Encoding"
              },
              {
                "name": "lb",
                "value": "TclPrdLbHd1"
              },
              {
                "name": "cf_cache_status",
                "value": "DYNAMIC"
              },
              {
                "name": "report_to",
                "value": "{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=6NzGfHV8CPZGFuNQeLYdV3wdydGoxhXsLry%2BK2mri2NUFwomS71INuAPVRLQWBUFubjKXYAasqD4%2BKlkbtISb5MNKJq9ATQRliz7xqnMG4O8slvjmR9VRA7TRLGk%2B2HfBKknXKw%3D\"}],\"group\":\"cf-nel\",\"max_age\":604800}"
              },
              {
                "name": "nel",
                "value": "{\"success_fraction\":0,\"report_to\":\"cf-nel\",\"max_age\":604800}"
              },
              {
                "name": "cf_ray",
                "value": "71da86109df03817-IAD"
              }
            ],
            "access_control_allow_headers": null,
            "access_control_allow_methods": null,
            "access_control_allow_origin": null,
            "cache_control": "private",
            "clear_site_data": null,
            "content_encoding": "gzip",
            "content_security_policy": null,
            "content_type": "text/html; charset=utf-8",
            "cross_origin_embedder_policy": null,
            "cross_origin_opener_policy": null,
            "cross_origin_resource_policy": null,
            "expect_ct": "max-age=604800, report-uri=\"https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct\"",
            "feature_policy": null,
            "last_modified": null,
            "permission_policy": null,
            "referrer_policy": null,
            "server": "cloudflare",
            "set_cookie": "site_version_phase=<value>; expires=Wed, 14-Jun-2023 07:24:12 GMT; path=/, site_version=<value>; expires=Wed, 14-Jun-2023 07:24:12 GMT; path=/, captcha-tracker=; expires=Sat, 18-Jun-2022 07:24:12 GMT; path=/",
            "strict_transport_security": null,
            "x_content_type_options": null,
            "x_download_options": null,
            "x_frame_options": null,
            "x_permitted_cross_domain_policies": null,
            "x_powered_by": "ASP.NET",
            "x_xss_protection": null
          },
          "cookies": [
            {
              "name": "site_version",
              "value": "<value>"
            },
            {
              "name": "site_version_phase",
              "value": "<value>"
            }
          ]
        }
      }
    },
    {
      "punycode": "australiaglobalalumniinindonesia.org",
      "unicode": "australiaglobalalumniinindonesia.org",
      "is_idn": false,
      "subdomain": null,
      "subdomain_last": null,
      "subdomain_root": null,
      "name": {
        "punycode": "australiaglobalalumniinindonesia",
        "unicode": "australiaglobalalumniinindonesia",
        "is_idn": false,
        "contains_letter": true,
        "contains_number": false,
        "contains_hyphen": false,
        "length": 32,
        "lang": "en",
        "keywords": [
          "australia",
          "global",
          "alumni",
          "in",
          "indonesia"
        ],
        "keyword_count": 5,
        "latinized": [],
        "contains_confusable": false
      },
      "domain": {
        "punycode": "australiaglobalalumniinindonesia.org",
        "unicode": "australiaglobalalumniinindonesia.org",
        "is_idn": false,
        "name": {
          "punycode": "australiaglobalalumniinindonesia",
          "unicode": "australiaglobalalumniinindonesia",
          "is_idn": false,
          "contains_letter": true,
          "contains_number": false,
          "contains_hyphen": false,
          "length": 32,
          "lang": "en",
          "keywords": [
            "australia",
            "global",
            "alumni",
            "in",
            "indonesia"
          ],
          "keyword_count": 5
        },
        "extension": {
          "punycode": "org",
          "unicode": "org",
          "is_idn": false
        },
        "extension_root": {
          "punycode": "org",
          "unicode": "org",
          "is_idn": false
        },
        "extension_sub": null,
        "extension_type": 1,
        "reserved": null,
        "premium": null,
        "registered": true,
        "whois": {
          "create_date": "2016-09-26T15:26:54Z",
          "update_date": "2025-09-28T14:34:27Z",
          "expiry_date": "2026-09-26T15:26:54Z",
          "registrar": "pdr ltd. d/b/a publicdomainregistry.com",
          "registrant": {
            "name": null,
            "organization": null,
            "street": null,
            "city": null,
            "state": null,
            "postal_code": null,
            "country": null,
            "phone": null,
            "email": null
          },
          "name_servers": [
            "luciane.ns.cloudflare.com",
            "will.ns.cloudflare.com"
          ],
          "domain_status": [
            "clienttransferprohibited"
          ],
          "whois_server": "http://whois.publicdomainregistry.com",
          "check_date": "2026-08-01T09:27:54Z"
        },
        "whois_normalized": {
          "registrant": null
        },
        "whois_last_check_date": "2026-08-01T09:27:54Z",
        "whois_create_date_historical": [
          "2016-09-26T15:26:54Z"
        ],
        "whois_last_change_date": "2025-10-13T20:38:05Z",
        "whois_registrant_email_historical": [
          "user@domainsbyproxy.com",
          "please query the rdds service of the registrar of record identified in this output for information on how to contact the registrant, admin, or tech contact of the queried domain name.",
          "redacted"
        ],
        "whois_privacy_enabled": null,
        "dns": {
          "a": {
            "update_date": "2026-09-03T17:23:55Z",
            "ip_addresses": [
              "104.21.78.221",
              "172.67.137.219"
            ]
          }
        },
        "dns_last_change_date": "2026-09-03T17:25:02Z",
        "ip_history": [
          "203.161.24.203",
          "103.176.59.105",
          "104.21.78.221",
          "172.67.137.219",
          "188.114.96.3",
          "188.114.97.3",
          "188.114.96.2",
          "188.114.97.2"
        ],
        "ssl": {
          "validity": {
            "start_date": "2026-07-06T08:21:42Z",
            "end_date": "2026-10-04T09:19:15Z"
          },
          "serial_number": "295212871666709154988932117282639606350",
          "check_date": "2026-08-09T21:15:11Z"
        },
        "ssl_last_change_date": "2026-08-07T04:42:32Z"
      },
      "type": 1,
      "subdomain_level_count": 0,
      "dns": {
        "a": {
          "update_date": "2026-09-03T17:23:55Z",
          "ip_addresses": [
            "104.21.78.221",
            "172.67.137.219"
          ]
        },
        "aaaa": {
          "update_date": "2026-09-03T17:23:55Z",
          "ip_addresses": [
            "2606:4700:3035::6815:4edd",
            "2606:4700:3035::ac43:89db"
          ]
        },
        "ns": {
          "update_date": "2026-09-03T17:23:55Z",
          "name_servers": [
            "luciane.ns.cloudflare.com",
            "will.ns.cloudflare.com"
          ]
        },
        "mx": {
          "update_date": "2026-09-03T17:23:55Z",
          "mail_servers": []
        },
        "soa": {
          "update_date": "2026-09-03T17:23:55Z",
          "mnames": [
            "luciane.ns.cloudflare.com"
          ],
          "rnames": [
            "dns.cloudflare.com"
          ],
          "rname_emails": [
            "user@cloudflare.com"
          ]
        },
        "txt": {
          "update_date": "2026-09-03T17:23:55Z",
          "values": [
            "\"v=spf1 ip4:103.176.58.175 include:australiaglobalalumniinindonesia.org ~all\""
          ]
        },
        "cname": {
          "update_date": "2026-09-03T17:23:55Z",
          "values": []
        },
        "others": []
      },
      "dns_last_change_date": "2026-09-03T17:24:59Z",
      "ip_history": [
        "203.161.24.203",
        "103.176.59.105",
        "104.21.78.221",
        "172.67.137.219",
        "188.114.96.3",
        "188.114.97.3",
        "188.114.96.2",
        "188.114.97.2"
      ],
      "ssl": {
        "tags": [
          "dla"
        ],
        "fqdns": [
          "australiaglobalalumniinindonesia.org"
        ],
        "version": 3,
        "serial_number": "295212871666709154988932117282639606350",
        "fingerprint": {
          "sha256": "0c4bcb0f2a5642e173aa4e76daa982f087ed32204c2d31d5eb6d45d0e4a7ccdf",
          "sha1": "aa2b7fc86dafcce72b9051be15c1f91ba9653cb5",
          "md5": "bdb2f14dcb833fd91c90724deec746be"
        },
        "validity": {
          "start_date": "2026-07-06T08:21:42Z",
          "end_date": "2026-10-04T09:19:15Z",
          "length": 7779453
        },
        "signature": {
          "is_self_signed": false,
          "is_valid": true,
          "value": "MEYCIQDfMig/opIqft9yFAmrWxkfAlOm6VfELxuKFoFXGC6fZQIhANtYFxbSkZ1P0VRBdCt9ForpmI/2Abb/cburLSnrkvts",
          "algorithm": {
            "oid": "1.2.840.10045.4.3.2",
            "name": "sha256"
          }
        },
        "issuer_dn": "CN=WE1,O=Google Trust Services,C=US",
        "issuer": {
          "common_name": "WE1",
          "country": "US",
          "state": null,
          "locality": null,
          "organization": "Google Trust Services",
          "organizational_unit": null
        },
        "subject_dn": "CN=australiaglobalalumniinindonesia.org",
        "subject": {
          "common_name": "australiaglobalalumniinindonesia.org",
          "country": null,
          "state": null,
          "locality": null,
          "organization": null,
          "organizational_unit": null
        },
        "extensions": {
          "authority_key_id": "kHeSNWfE/6jMqeZ72YB5e8yT+Tg=",
          "basic_constraints": {
            "is_ca": false
          },
          "certificate_policies": [
            "2.23.140.1.2.1"
          ],
          "extended_key_usage": {
            "client_auth": null,
            "server_auth": true
          },
          "key_usage": {
            "digital_signature": true,
            "content_commitment": false,
            "key_agreement": false,
            "data_encipherment": false,
            "key_encipherment": false,
            "key_cert_sign": false,
            "crl_sign": false
          },
          "signed_certificate_timestamps": [
            "2026-07-06T09:21:42Z"
          ],
          "subject_alt_name": {
            "dns_names": [
              "australiaglobalalumniinindonesia.org",
              "*.australiaglobalalumniinindonesia.org"
            ]
          },
          "subject_key_id": "bVJjNp9BS6RbFKwwm6a1flGmJeU="
        },
        "check_date": "2026-08-09T21:15:11Z"
      },
      "ssl_last_change_date": "2026-08-07T04:42:32Z",
      "webdata": {
        "connection_status": "success",
        "html": {
          "source_code_hash": "e26551e0c20a2fc8a8179c7521fa2236fb009823475be39f057df28b38db8139"
        },
        "http": {
          "status_code_first": 301,
          "status_code_last": 403,
          "redirection_history": [
            {
              "url": "http://australiaglobalalumniinindonesia.org/",
              "status_code": 301
            },
            {
              "url": "https://www.australiaglobalalumniinindonesia.org/",
              "status_code": 403
            }
          ],
          "external_redirection": false,
          "final_url": "https://www.australiaglobalalumniinindonesia.org/",
          "final_fqdn": "www.australiaglobalalumniinindonesia.org",
          "final_domain": "australiaglobalalumniinindonesia.org",
          "headers": {
            "others": [
              {
                "name": "date",
                "value": "Sun, 12 Jul 2026 19:45:26 GMT"
              },
              {
                "name": "transfer_encoding",
                "value": "chunked"
              },
              {
                "name": "connection",
                "value": "close"
              },
              {
                "name": "accept_ch",
                "value": "Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA"
              },
              {
                "name": "cf_mitigated",
                "value": "challenge"
              },
              {
                "name": "critical_ch",
                "value": "Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA"
              },
              {
                "name": "origin_agent_cluster",
                "value": "?1"
              },
              {
                "name": "permissions_policy",
                "value": "accelerometer=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=(),xr-spatial-tracking=*"
              },
              {
                "name": "server_timing",
                "value": "chlray;desc=\"a1a28c5d9a8095c1\""
              },
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            "cross_origin_resource_policy": "same-origin",
            "expect_ct": "max-age=86400, enforce",
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            "permission_policy": null,
            "referrer_policy": "same-origin",
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        }
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    },
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      "subdomain_level_count": 0,
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          "dla"
        ],
        "fqdns": [
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            "server_auth": true
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              {
                "name": "date",
                "value": "Mon, 17 Aug 2026 07:52:00 GMT"
              },
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                "name": "transfer_encoding",
                "value": "chunked"
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              {
                "name": "vary",
                "value": "accept-encoding"
              },
              {
                "name": "cf_ray",
                "value": "a2c718cd3fc5124c-ORD"
              },
              {
                "name": "alt_svc",
                "value": "h3=\":443\"; ma=86400"
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            ],
            "access_control_allow_headers": null,
            "access_control_allow_methods": null,
            "access_control_allow_origin": null,
            "cache_control": null,
            "clear_site_data": null,
            "content_encoding": "gzip",
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            "cross_origin_embedder_policy": null,
            "cross_origin_opener_policy": null,
            "cross_origin_resource_policy": null,
            "expect_ct": "max-age=86400, enforce",
            "feature_policy": null,
            "last_modified": null,
            "permission_policy": null,
            "referrer_policy": "strict-origin-when-cross-origin",
            "server": "cloudflare",
            "set_cookie": null,
            "strict_transport_security": "max-age=31536000",
            "x_content_type_options": "nosniff",
            "x_download_options": null,
            "x_frame_options": "SAMEORIGIN",
            "x_permitted_cross_domain_policies": null,
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            "x_xss_protection": "1; mode=block"
          },
          "cookies": []
        }
      }
    }
  ]
}
```

## Related Examples

- [Feature-Policy Present](/reference/discovery/domain-search/examples/webdata-http-headers-feature-policy/)
- [Last-Modified Present](/reference/discovery/domain-search/examples/webdata-http-headers-last-modified/)
- [Permission Policy Present](/reference/discovery/domain-search/examples/webdata-http-headers-permission-policy/)
- [Clear-Site-Data Present](/reference/discovery/domain-search/examples/webdata-http-headers-clear-site-data/)
- [Access-Control-Allow-Methods Present](/reference/discovery/domain-search/examples/webdata-http-headers-access-control-allow-methods/)
- [Access-Control-Allow-Headers Present](/reference/discovery/domain-search/examples/webdata-http-headers-access-control-allow-headers/)
