niche · -1.5 marketcapability domainschema

WHOIS

Score 20.0 / 100 18 providers +8 via APIs 17 APIs Search apis.io →
Workflows using this tag
IPinfo Abuse Contact and Hosted Domains · IPinfo IPinfo Batch Enrich then Detail · IPinfo IPinfo IP Threat Screening · IPinfo IPinfo Summarize and Map IP Addresses · IPinfo IPinfo Enrich My Current IP · IPinfo IPinfo IP to Operating Company · IPinfo IPinfo ASN Prefix Reconnaissance · IPinfo
Business capabilities this tag reaches
Data & Reference Information Services 1

Providers using this tag (18)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 3 Complete, well-documented, and agent-ready
WhoisFreaksDNSDomain IntelligenceIP Intelligence / Geolocation1 API69.1rdapapi-ioCompanyRDAPDomain1 API66.6APIVerveAPI MarketplaceRESTJSONGraphQL1 API73.9
Strong 4 Solid coverage with minor gaps
DomScanDomainsDNSRDAP1 API65.3IPinfoIP IntelligenceIP GeolocationASNPrivacy Detection1 API63.6APIFreaks - API Hub for DevelopersIP IntelligenceGeolocationDomain Intelligence104 APIs61.6MCP360MCPMCP ServerMCP GatewayAI Agents38 APIs54.3
Developing 5 Usable, with meaningful gaps to close
WhoAPICompanyDomainsDomain Availability1 API53.5Just DomainCompanyDomainRegistrarArtificial Intelligence1 API42.8Silent PushCompanySecurityThreat IntelligenceCybersecurity2 APIs40.2DomainToolsCompanyThreat IntelligenceDomain IntelligenceDNS4 APIs50.6CybleThreat IntelligenceCybersecurityAttack Surface ManagementInternet Scanning1 API48.6
Thin 2 Limited public surface area
SpaceshipCompanyDomainsDomain RegistrarDNS1 API34.5QName AI WHOIS APIRDAPDomain Searchbatch-lookup1 API27.4
Emerging 4 Early or largely undocumented
canyougrab.itCompanyDomainBulkDNS1 API25.3oti-labs-comCompanyDomain IntelligenceSecurity1 API19.8ferntool-comIP LookupSpeed TestDNS Lookup1 API20.3LinkPeekScreenshotswebpage-capturewebsite-thumbnailsImage Generation3 APIs13.9

APIs with this tag (17)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 4 Complete, well-documented, and agent-ready
APIVerve GraphQL API (alpha)Single GraphQL endpoint that fans out to multiple APIs in one request. Explicitly labeled alpha / not for p...73.9APIVerve MCP ServerHosted remote MCP server (streamable HTTP) exposing every catalog endpoint as individual MCP tools with inp...73.9WhoisFreaks MCP ServerOfficial open-source Model Context Protocol server (Java) exposing 14 WhoisFreaks domain-intelligence tools...69.1WhoisFreaks WHOIS APIWHOIS lookup APIs (live, historical, reverse, bulk)69.1
Strong 3 Solid coverage with minor gaps
IPinfo Whois APIIP WHOIS API63.6APIFreaks MCP ServerOfficial first-party Model Context Protocol server (Apache-2.0) exposing 59 read-only tools across 13 categ...61.6MCP360 Whois APIThe whois API from MCP360 — 3 operation(s) for whois.54.3
Developing 4 Usable, with meaningful gaps to close
api-ninjas-com Whois APIThe Whois API retrieves domain registration information for any given domain using the WHOIS protocol.52.8DATPAQ WHOIS APIDomain WHOIS registration data lookup45.5Digital Shadows SearchLight Portal APIREST API of the Digital Shadows SearchLight digital-risk-protection portal, operated by ReliaQuest since it...40.0RIPE NCC APIRIPE NCC API as documented publicly: 28 operations. Contract generated from the documentation by API Evange...39.9
Thin 4 Limited public surface area
Chaitin Tech 资产/种子/域名 WHOIS APIThe 资产/种子/域名 WHOIS API from Chaitin Tech — 6 operation(s) for 资产/种子/域名 whois.35.3Dharun Ashokkumar Whois APIThe Whois API from Dharun Ashokkumar — 1 operation(s) for whois.30.3fetcher-cloud Whois APIThe Whois API from fetcher-cloud — 1 operation(s) for whois.30.2QName AI WHOIS REST APIApproval-gated REST API for WHOIS/RDAP lookups: GET /api/whois/{domain} (single), POST /api/whois/batch (ba...27.4
Emerging 2 Early or largely undocumented
ferntool-com Whois APIThe Whois API from ferntool-com — 1 operation(s) for whois.20.354ch10 Whois APIThe Whois API from 54ch10 — 2 operation(s) for whois.19.1

Companies reaching this through an API (8)

These companies publish an API, specification or operation carrying “WHOIS” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

54ch10 api-ninjas-com Chaitin Tech DATPAQ Dharun Ashokkumar fetcher-cloud ReliaQuest RIPE NCC

Score breakdown

Frequency
42.8
log-scaled weighted occurrences
Breadth
0.2
spread across providers
Quality lift
46.2
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor

Related tags

Domain Intelligence 9 co-occurrences SSL 8 co-occurrences DNS 15 co-occurrences Domain 8 co-occurrences Email Verification 5 co-occurrences Threat Intelligence 6 co-occurrences Weather 5 co-occurrences Cybersecurity 6 co-occurrences

Where this tag comes from

Api tag16
Provider tag18
Openapi tag11
Openapi op tag32

Work with this as data

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for tags

7 MCP tools reach this
  • find_tagsBrowse and filter every tag in the catalog.
  • get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
  • cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This tag 
curl "https://apis.io/api/v1/tags/whois"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort (paid plan)
The distribution (Pro)

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.