Introduction

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Welcome to the DomainResearch API documentation! By accessing our endpoints, you’ll get information on various domains in our database.

We have language bindings in Shell and Python! We’ll surely have some more soon:) On the right, you can see code examples and it is super easy to switch them using tabs in the top right.

Authentication

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DomainResearch API uses basic authentication to allow access to the API

To authorize, pass the credentials with each request:

import requests

r = requests.get('https://api_endpoint_here/', auth=('user', 'password'), ...)

curl -u "user:password" "https://api_endpoint_here/" ...

Make sure to replace user and password with your credentials.

Search endpoint

import requests

r = requests.post(
    'https://domainresearch.domaincrawler.com/api/v2/search/',
    auth=('user', 'password'),
    json={
        "query":
            [
                {
                    "field": "title",
                    "values":[
		        		{
	    		    		"query_type": "all_words",
					        "value": "airpods"
    				    }
                    ]
                },
                {
                    "field": "apps",
                    "values": [
                        {
				        	"query_type": "eq",
		        			"value": {
				        		"categories": "Ecommerce",
						        "name": [
        							"OpenCart",
        							"Shopify"
        						]
		     		    	}
			        	}
                    ]
                },
                {
                    "field": "tld",
                    "values": [
        				{
		        			"query_type": "in",
				        	"value": [
						        "com",
        						"shop"
		        			]
				        }
                    ],
                }
            ],
        "limit": 100,
        "format": "json"
    })

print(r.json())

curl -u "user:password" 'https://domainresearch.domaincrawler.com/api/v2/search/' \
-H "Content-Type: application/json" \
--data-raw '{
	"format": "json",
	"from": 0,
	"limit": 100,
	"query": [
		{
			"field": "title",
			"values": [
				{
					"query_type": "all_words",
					"value": "airpods"
				}
			]
		},
		{
			"field": "apps",
			"values": [
				{
					"query_type": "eq",
					"value": {
						"categories": "Ecommerce",
						"name": [
							"OpenCart",
							"Shopify"
						]
					}
				}
			]
		},
		{
			"field": "tld",
			"values": [
				{
					"query_type": "in",
					"value": [
						"com",
						"shop"
					]
				}
			]
		}
	]
}'

The above command returns JSON structured like this:

{
    "domains": [
        {
            "domain": "example.com",
            "registration_date": "2020-05-30T16:37:37.000Z",
            ...
        },
        ...
    ], 
    "tlds": {
        "com": 22, 
        "store": 2
    }, 
    "total": 24
}

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Description

This is the main endpoint for searching through the data. It returns domains list for the given search query.
For now, it supports a limited set of filters, but we’ll expand them soon.

HTTP Request

POST https://domainresearch.domaincrawler.com/api/v2/search/

JSON parameters

Parameter	Value	Description
query	{object with filters}	Put desired filters here. See below for the detailed description about each filter.
limit	100	Set the limit for the results. Put 0 to disable limit.
format	“csv” or “json”	Specify the response format.

HTML Content Filter

{
    "field": "html_content",  // filter name
    "values": [  // specify one or more filter values. All values are combined with AND operator
		{
            // Specify "all_words" if you want to search for the all words,
            // "any_word" if you want to search for any word,
            // "exact_phrase" if you want to search the phrase
            // "exclude" if you want to exclude websites that contain specified word in this field(s).
	    	"query_type": "all_words",
			"value": "airpods"  // value
		},
        ...
	]
}

This filter allows full-text search in website Title, Meta Description, Meta Keywords, H1 Text.

Title Filter

{
    "field": "title",  // filter name
    "values": [  // specify one or more filter values. All values are combined with AND operator
		{
            // Specify "all_words" if you want to search for the all words,
            // "any_word" if you want to search for any word,
            // "exact_phrase" if you want to search the phrase
            // "exclude" if you want to exclude websites that contain specified word in this field(s).
	    	"query_type": "all_words",
			"value": "airpods"  // value
		},
        ...
	]
}

This filter allows full-text search in website Title.

Meta Keywords Filter

{
    "field": "meta_keywords",  // filter name
    "values": [  // specify one or more filter values. All values are combined with AND operator
		{
            // Specify "all_words" if you want to search for the all words,
            // "any_word" if you want to search for any word,
            // "exact_phrase" if you want to search the phrase
            // "exclude" if you want to exclude websites that contain specified word in this field(s).
	    	"query_type": "all_words",
			"value": "airpods"  // value
		},
        ...
	]
}

This filter allows full-text search in website Meta Keywords.

Meta Description Filter

{
    "field": "meta_description",  // filter name
    "values": [  // specify one or more filter values. All values are combined with AND operator
		{
            // Specify "all_words" if you want to search for the all words,
            // "any_word" if you want to search for any word,
            // "exact_phrase" if you want to search the phrase
            // "exclude" if you want to exclude websites that contain specified word in this field(s).
	    	"query_type": "all_words",
			"value": "airpods"  // value
		},
        ...
	]
}

This filter allows full-text search in website Meta Description.

h1 Text Filter

{
    "field": "h1_text",  // filter name
    "values": [  // specify one or more filter values. All values are combined with AND operator
		{
            // Specify "all_words" if you want to search for the all words,
            // "any_word" if you want to search for any word,
            // "exact_phrase" if you want to search the phrase
            // "exclude" if you want to exclude websites that contain specified word in this field(s).
	    	"query_type": "all_words",
			"value": "airpods"  // value
		},
        ...
	]
}

This filter allows full-text search in website h1 Text.

Apps Filter

{
    "field": "apps",  // filter name
    "values": [  // specify one or more filter values. All values are combined with AND operator.
		{
			"query_type": "eq",  // only "eq" query type is supported
			"value": {
				"categories": "Ecommerce",
                // specify one or more techonologies for the category.
                // All values are combined with OR operator.
				"name": [
					"OpenCart",
					"Shopify"
				]
			}
		}
	]
}

This filter allows search for domains that are using a specified technology.
Please, view DomainResearch GUI version to see all possible technologies categories and names:

DomainResearch GUI version

TLD Filter

{
	"field": "tld",  // filter name
	"values": [
		{
			"query_type": "in",  // only "in" query type is supported
            // Specify one or more TLDs. 
            // All values are combined with OR operator.
			"value": [
				"com",
				"shop"
			]
		}
	]
}

This filter allows search by a domain’s TLD.

Domain Name Filter

{
	"field": "domain",  // filter name
	"values": [
		{
            // available query types are: "starts_with", "ends_with", "contains" and "regex"
            // queries that have wildcards in the beginning of the string 
            // (i.e. "endswith", "contains", and "regex" that doesn't start from the beginning) can be quite slow
			"query_type": "starts_with",
			"value": "cooldomain"
		}
	]
}

This filter allows searching a substring in domain name using substring or regular expression.

Domain Length Filter

{
	"field": "domain_length",  // filter name
	"values": [
		{
            // available query types are: "eq", "lt", "lte", "gt", "gte"
			"query_type": "gt",
			"value": "5"
		}
	]
}

This filter allows filtering by a domain length.

Redirect Filter

{
	"field": "redirect",  // filter name
	"values": [
		{
            // "eq" and "exclude" query types are supported
			"query_type": "eq",
			"value": "domain.com"
		}
	]
}

This filter allows filtering by a domain redirect target. Filter includes “www.” automatically, e.g. search for “example.com” will find all domains that are redirect to example.com or www.example.com.

Creation Date Filter

{
	"field": "registration_date",  // filter name
	"values": [
		{
            // available query types are: "eq", "lt", "lte", "gt", "gte"
			"query_type": "gte",
			"value": "2021-05-14"
		}
	]
}

This filter allows filtering by a domain Creation Date.

Expiration Date Filter

{
	"field": "expiration_date",  // filter name
	"values": [
		{
            // available query types are: "eq", "lt", "lte", "gt", "gte"
			"query_type": "lte",
			"value": "2021-05-14"
		}
	]
}

This filter allows filtering by a domain Expiration Date.

Update Date Filter

{
	"field": "last_update_date",  // filter name
	"values": [
		{
            // available query types are: "eq", "lt", "lte", "gt", "gte"
			"query_type": "gte",
			"value": "2021-05-14"
		}
	]
}

This filter allows filtering by a domain Update Date.

Addition Date Filter

{
	"field": "addition_date",  // filter name
	"values": [
		{
            // available query types are: "eq", "lt", "lte", "gt", "gte"
			"query_type": "gte",
			"value": "2021-05-14"
		}
	]
}

This filter allows filtering by a date when a domain was added to the IV database. For example, it allows to get recently added domains when using “gt” or “gte” query type.

Registrar ID Filter

{
	"field": "registrar_id",  // filter name
	"values": [
		{
            // only "in" query type is supported
			"query_type": "in",
            // Specify one or more Registrars IDs. 
            // All values are combined with OR operator.
			"value": [
                "123",
                "456"
            ]
		}
	]
}

This filter allows search by a domain’s Registrar ID.

Registrar Name Filter

{
	"field": "registrar",  // filter name
	"values": [
		{
            // only "contains" query type is supported
			"query_type": "contains",
			"value": "Registrar name"
		}
	]
}

This filter allows search by a domain’s Registrar Name.

Registrant Name Filter

{
	"field": "registrant",  // filter name
	"values": [
		{
            // only "eq" query type is supported
			"query_type": "eq",
			"value": "John Smith"
		}
	]
}

This filter allows search by a domain’s Registrant Name.

Registrant Country Filter

{
	"field": "registrant_country",  // filter name
	"values": [
		{
            // only "eq" query type is supported
			"query_type": "eq",
            // 2-digit country code
			"value": "US"
		}
	]
}

This filter allows search by a domain’s Registrant Country.

Registrant Phone Filter

{
	"field": "registrant_phone",  // filter name
	"values": [
		{
            // only "eq" query type is supported
			"query_type": "eq",
            // Phones are parsed from different WHOISes, and stored in the different formats.
            // We don't change them to the single format yet, so this filter won't find the number
            // if it is stored in the different format. This will be fixed in the future updates.
			"value": "+1.2346789012"
		}
	]
}

This filter allows search by a domain’s Registrant Phone.

Registrant Fax Filter

{
	"field": "registrant_fax",  // filter name
	"values": [
		{
            // only "eq" query type is supported
			"query_type": "eq",
            // Phones are parsed from different WHOISes, and stored in the different formats.
            // We don't change them to the single format yet, so this filter won't find the number
            // if it is stored in the different format. This will be fixed in the future updates.
			"value": "+1.2346789012"
		}
	]
}

This filter allows search by a domain’s Registrant Fax.

Registrant Email Filter

{
	"field": "registrant_email",  // filter name
	"values": [
		{
            // only "eq" query type is supported
			"query_type": "eq",
			"value": "user@domain.com"
		}
	]
}

This filter allows search by a domain’s Registrant Email.

DNS A Record Filter

{
	"field": "A",  // filter name
	"values": [
		{
            // "wildcard" query type is supported.
            // "?" matches any single character,
            // "*" can match zero or more characters, including an empty one.
			"query_type": "wildcard",
			"value": "1.1.1.*"
		}
	]
}

This filter allows search by a DNS “A” record.

DNS AAAA Record Filter

{
	"field": "AAAA",  // filter name
	"values": [
		{
            // "wildcard" query type is supported.
            // "?" matches any single character,
            // "*" can match zero or more characters, including an empty one.
			"query_type": "wildcard",
			"value": "2001:0db8:0000:0000:0000:0000:3257:9652"
		}
	]
}

This filter allows search by a DNS “AAAA” record.

DNS MX Record Filter

{
	"field": "MX",  // filter name
	"values": [
		{
            // "wildcard" query type is supported.
            // "?" matches any single character,
            // "*" can match zero or more characters, including an empty one.
			"query_type": "wildcard",
			"value": "mx*.domain.com"
		}
	]
}

This filter allows search by a DNS “MX” record.

DNS NS Record Filter

{
	"field": "NS",  // filter name
	"values": [
		{
            // "wildcard" query type is supported.
            // "?" matches any single character,
            // "*" can match zero or more characters, including an empty one.
			"query_type": "wildcard",
			"value": "*.cloudflare.com."
		}
	]
}

This filter allows search by a DNS “NS” record.

DNS TXT Options Filter

{
	"field": "TXT",  // filter name
	"values": [
		{
            // only "startswith" query type is supported
			"query_type": "startswith",
            // possible options are:
            // google-site-verification
            // facebook-domain-verification
            // atlassian-domain-verification
            // adobe-idp-site-verification
            // ahrefs-site-verification
            // cisco-ci-domain-verification
            // All options are combined with AND operator.
			"value": [
				"google-site-verification",
				"facebook-domain-verification"
			]

		}
	]
}

This filter allows search by some DNS TXT values. Possible options:

google-site-verification
facebook-domain-verification
atlassian-domain-verification
adobe-idp-site-verification
ahrefs-site-verification
cisco-ci-domain-verification

Filter will return domains that have these options present in DNS TXT.

DNS SPF Records Filter

{
	"field": "TXT_SPF",  // filter name
	"values": [
		{
            // only "startswith_v=spf" query type is supported
			"query_type": "startswith_v=spf",
			"value": "zendesk"
		}
	]
}

This filter allows search by some DNS TXT SPF records.
For example, putting “zendesk” in this filter will return all domains that have a Zendesk record in their TXT SPF records.

Parked Domains Filter

{
	"field": "parked_domains",  // filter name
	"values": [
		{
            // only "eq" query type is supported
			"query_type": "eq",
            // Specify "exclude_parked" to exclude parked domains from a search;
            // "only_parked" to include only parked domains to a search.
			"value": "exclude_parked"
		}
	]
}

This filter allows search for parked domains.
Due to the current implementation, queries with this filter can be quite slow. This will be fixed in the future updates.

Response Description

JSON

Key	Description
domains	The array with found domains.
tlds	The number of found domains per TLD.
total	The total number of found domains (even if “limit” is set, this number shows the non-limited number of found domains).

CSV

Currently CSV output provides just the list of found domains, one per line.

Domain Details endpoint

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Description

import requests

r = requests.get(
    'https://domainresearch.domaincrawler.com/api/domain_details/example.com',
    auth=('user', 'password')
    )

print(r.json())

curl -u "user:password" 'https://domainresearch.domaincrawler.com/api/domain_details/example.com'

The above command returns JSON structured like this:

{
  "domain": "example.com",
  "dns": {
    "2021-02-22 12:45:50": {
      "A": [
        "93.184.216.34"
      ],
      "AAAA": [
        "2606:2800:220:1:248:1893:25c8:1946"
      ],
      "MX": [
        "."
      ],
      "NS": [
        "a.iana-servers.net.",
        "b.iana-servers.net."
      ],
      "TXT": [
        "v=spf1 -all",
        "8j5nfqld20zpcyr8xjw0ydcfq9rk8hgm"
      ]
    },
    "2021-02-26 02:44:32": {
      "A": [
        "93.184.216.34"
      ],
      "AAAA": [
        "2606:2800:220:1:248:1893:25c8:1946"
      ],
      "MX": [
        "."
      ],
      "NS": [
        "a.iana-servers.net.",
        "b.iana-servers.net."
      ],
      "TXT": [
        "v=spf1 -all",
        "8j5nfqld20zpcyr8xjw0ydcfq9rk8hgm"
      ]
    }
  },
  "apps": {
    "2021-02-22 12:45:50": [
      {
        "categories": [
          "IaaS"
        ],
        "name": "Amazon ECS"
      },
      {
        "categories": [
          "PaaS"
        ],
        "name": "Amazon Web Services"
      },
      {
        "categories": [
          "Containers"
        ],
        "name": "Docker"
      }
    ],
    "2021-02-26 02:44:32": [
      {
        "categories": [
          "Containers"
        ],
        "name": "Docker"
      },
      {
        "categories": [],
        "name": "Linux"
      },
      {
        "categories": [
          "IaaS"
        ],
        "name": "Amazon ECS"
      },
      {
        "categories": [
          "PaaS"
        ],
        "name": "Amazon Web Services"
      }
    ]
  },

  ...
}

This endpoint allows to get all the data about specified domain.

HTTP Request

GET https://domainresearch.domaincrawler.com/api/domain_details/<domain_name>

Response Description

Response is a big JSON file with various keys. Each key describes a data point. Each value is an object for a corresponding data point, that contains dates when the data was downloaded and value for each date. The result JSON is too big to be shown in the documentation, see a small example with just a few datapoints included at right.

Historical Data endpoints

Description

These endpoints provide historical data for a specified domain.

To get the historical data, first, you need to get the list of dates for which we have corresponding historical data.

Dates list

import requests

r = requests.get(
    'https://domainresearch.domaincrawler.com/api/dns/dates/?domain=domaincrawler.com',
    auth=('user', 'password')
    )

print(r.json())

curl -u "user:password" 'https://domainresearch.domaincrawler.com/api/dns/dates/?domain=domaincrawler.com'

The above command returns JSON structured like this:

{
  "resource": [
    {
      "date": "2021-09-13T17:56:32.431000"
    },
    {
      "date": "2021-09-08T15:00:27.276000"
    },
    {
      "date": "2021-09-06T01:59:48.942000"
    },
    ...
  ]
}

HTTP Request

GET https://domainresearch.domaincrawler.com/api/<data_type>/dates/?domain=<domain_name>

Description

Possible data types are:

dns - for DNS records
whois - for WHOIS records
cipa - for other records (HTML, SSL, apps, robots.txt, etc.)

A response will contain all the dates for the corresponding data type in a descending order.

Historical data

import requests

r = requests.get(
    'https://domainresearch.domaincrawler.com/api/dns/?domain=domaincrawler.com&date=2020-07-02T00:33:34.641000',
    auth=('user', 'password')
    )

print(r.json())

curl -u "user:password" 'https://domainresearch.domaincrawler.com/api/dns/?domain=domaincrawler.com&date=2020-07-02T00:33:34.641000'

The above command returns JSON structured like this:

{
  "resource": {
    "date": "2020-07-02T00:33:34.641000",
    "domain": "com.domaincrawler",
    "values": {
      "A": [
        "80.248.226.34"
      ],
      "SOA": null,
      "TXT": null,
      "AAAA": null,
      "CNAME": null,
      "NS": [
        "ns2.ettnet.se.",
        "ns.ettnet.se."
      ],
      "MX": [
        "smtp-in.sto-hy.se.stejtech.net.",
        "smtp-in.sto-ste.se.stejtech.net."
      ]
    }
  }
}

HTTP Request

GET https://domainresearch.domaincrawler.com/api/<data_point>/?domain=<domain_name>&date=<date_from_dates_list>

Description

Possible data points are:

dns
whois
robots_txt
program - for Google Analytics and Google Ads data
humans_txt
html_tags - for HTML content data
cert_info - for SSL data
apps
ads_txt

Hosting Name endpoint

Description

import requests

r = requests.get(
    'https://domainresearch.domaincrawler.com/api/hosting_name/domaincrawler.com',
    auth=('user', 'password')
    )

print(r.json())

curl -u "user:password" 'https://domainresearch.domaincrawler.com/api/hosting_name/domaincrawler.com'

The above command returns JSON structured like this:

{
  "domain": "domaincrawler.com", 
  "hosting": "Internet Vikings International AB"
}

or in a case of error

{
  "error": "hosting_unknown", 
  "msg": "Can't retrieve hosting"
}

The endpoint provides a domain hosting name.

HTTP Request

GET https://domainresearch.domaincrawler.com/api/hosting_name/<domain_name>

Response Description

Returns JSON with domain and hosting fields. In the case if domain isn’t found or hosted returns error hosting_unknown.

Hosting Details endpoint

Description

import requests

r = requests.get(
    'https://domainresearch.domaincrawler.com/api/hosting_details/domaincrawler.com',
    auth=('user', 'password')
    )

print(r.json())

curl -u "user:password" 'https://domainresearch.domaincrawler.com/api/hosting_details/domaincrawler.com'

The above command returns plain text response from Regional Internet Registry

The endpoint provides a domain hosting details.

HTTP Request

GET https://domainresearch.domaincrawler.com/api/hosting_details/<domain_name>

Response Description

Returns plain text response from Regional Internet Registry.

Errors

DomainCrawler API banner

Error Code	Meaning
400	Bad Request – Check you JSON arguments.
401	Unauthorized – Login or password is wrong.
404	Not Found – The specified endpoint could not be found.
405	Method Not Allowed – You tried to access endpoint with an invalid method.
500	Internal Server Error – We had a problem with our server. Try again later.