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DomainTools API Guide: Reverse Whois

The DomainTools API is organized into distinct products with queries that follow a REST-ful URL structure wherever possible. Each product offers free, un-authenticated access for the sample URLs listed with each product. If you haven't already, you may want to review the getting started document to learn about authentication and response formats.

The Reverse Whois API provides access to preview and purchase DomainTools Reverse Whois reports. 

  http://api.domaintools.com/v1/reverse-whois/?terms=DomainTools%20LLC|Seattle&mode=purchase
Reverse Whois Parameters
Parameters
Description
terms
Required.
List of one or more terms to search for in the Whois record, separated with the pipe character ( | ).
exclude
Domain names with Whois records that match these terms will be excluded from the result set. Separate multiple terms with the pipe character ( | ).
scope
Sets the scope of the report to include only current Whois records, or to include both current and historic records. Value must be current (the default) or historic.
mode
quote : only lists the size and retail price of the query
purchase : includes the complete list of domain names that match the query

Important: Your API account will be charged for the full price of a Reverse Whois report as defined by your service level every time you send a request to the API with mode=purchase. There are no refunds and no credit for duplicate requests. The only exception to this rule is the sample query listed above, and to be certain you are not charged, we recommend that you perform that sample query without authentication credentials.

You must provide your API credentials to use this API.

DomainTools API Guide