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Perform bulk WHOIS lookups for up to 100 domains in a single request. Retrieve structured registration, contact, and name server data for cybersecurity analysis, brand monitoring, and domain intelligence at scale.
The Bulk WHOIS Lookup API accepts a JSON array of domain names via POST and returns an array of WHOIS objects - one per domain. Each object uses the same structure as the single-domain WHOIS Domain Lookup response.
Pass your API key as the apiKey parameter in every request.
This is version 2.0 of the API.
Optional query parameter to control the response format.
formatoptionalStringdefault: jsonResponse format: 'json' (default) or 'xml'.
The request body must be a JSON object containing a domainNames array of up to 100 domain names or URLs to look up.
{
"domainNames": [
"microsoft.com"
]
}domainNamesrequiredArray<String>Array of domain names or URLs to look up. Maximum 100 items per request.
A successful request returns a 200 OK response with a JSON array containing WHOIS data for each domain. Partial successes return 206, and cached data returns 210. See the response preview on the right for the full JSON structure.
bulk_whois_responseSee the HTTP Status Codes documentation for a complete reference of common API errors and HTTP status codes.
Invalid domain name parameters. Please pass domain param correct value e.g. whoisfreaks.com, https://whoisfreaks.com , http://whoisfreaks.com