DomainTools

DomainTools is a domain and DNS intelligence company whose APIs power threat investigation, hunting, and monitoring for security teams. Its product surface spans Iris Investigate (pivot-based domain investigation), Iris Enrich (bulk domain enrichment), and Iris Detect (brand-infringement monitoring); the Farsight DNSDB passive DNS history API (300+ billion records); Lookups & Monitors (WHOIS, RDAP, hosting history, reverse IP/WHOIS, reputation, risk score, and change monitors); Threat Feeds (predictive risk and discovery feeds with RPZ integration); and Farsight SIE real-time DNS event streaming. DomainTools publishes OpenAPI specifications, an official Python SDK with a bundled CLI, and a remotely hosted MCP server for AI agents. A Battery Ventures portfolio company, enriched into the API Evangelist network.

DomainTools publishes 12 APIs on the APIs.io network, including Flex search API, Information API, Iris Detect API, and 9 more. Tagged areas include Company, Threat Intelligence, Domain Intelligence, DNS, and WHOIS.

DomainTools’ developer surface includes documentation, API reference, getting-started guide, authentication, engineering blog, support, signup flow, and 23 more developer resources.

🌐 Visit website 📡 Source on GitHub

49.2/100 developing ▬ flat Agent 39/100 agent ready saas Full breakdown ↓
scored 2026-09-06 · rubric v0.19.0

4 APIs 1 MCP Servers

Company Threat Intelligence Domain Intelligence DNS WHOIS Passive DNS Cybersecurity Domain Monitoring Risk Scoring Security

Kin Score

Kin Score How this is scored →
scored 2026-09-06 · rubric v0.19.0

Composite quality — 49.2/100 · developing

Contract Quality 13.5 / 25

Developer Ergonomics 14.6 / 20

Access Clarity 6.8 / 20

Operational Transparency 5.5 / 13

Contract Governance 0.5 / 12

Discoverability 8.2 / 10

Agent readiness — 39/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/domaintools: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 12

Individual APIs this provider publishes, each with its own machine-readable definition.

Open Collections 13

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

MCPServer

LLMsTxt

AgentSkill

WellKnown

AgenticAccess

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Lifecycle

Conventions

ErrorCatalog

Conformance

DataModel

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

Support

ChangeLog

StatusPage

Deprecation

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: domaintools
name: DomainTools
description: DomainTools is a domain and DNS intelligence company whose APIs power threat investigation, hunting, and monitoring
  for security teams. Its product surface spans Iris Investigate (pivot-based domain investigation), Iris Enrich (bulk domain
  enrichment), and Iris Detect (brand-infringement monitoring); the Farsight DNSDB passive DNS history API (300+ billion records);
  Lookups & Monitors (WHOIS, RDAP, hosting history, reverse IP/WHOIS, reputation, risk score, and change monitors); Threat
  Feeds (predictive risk and discovery feeds with RPZ integration); and Farsight SIE real-time DNS event streaming. DomainTools
  publishes OpenAPI specifications, an official Python SDK with a bundled CLI, and a remotely hosted MCP server for AI agents.
  A Battery Ventures portfolio company, enriched into the API Evangelist network.
url: https://raw.githubusercontent.com/api-evangelist/domaintools/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- battery-ventures
x-tier: enriched
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://www.domaintools.com/wp-content/uploads/dt-logo.png
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Threat Intelligence
- Domain Intelligence
- DNS
- WHOIS
- Passive DNS
- Cybersecurity
- Domain Monitoring
- Risk Scoring
- Security
apis:
- aid: domaintools:domaintools-flex-search-api
  name: DomainTools Flex search API
  description: The Flex search API from DomainTools — 2 operation(s) for flex search.
  humanURL: https://docs.domaintools.com/api/iris/
  baseURL: https://api.domaintools.com
  tags:
  - Flex search
  properties:
  - type: OpenAPI
    url: openapi/domaintools-flex-search-api-openapi.yml
  - type: APIReference
    url: https://docs.domaintools.com/api/iris/reference/
- aid: domaintools:domaintools-information-api
  name: DomainTools Information API
  description: 'Access the latest information about your account, including service

    limits.'
  humanURL: https://docs.domaintools.com/api/iris/
  baseURL: https://api.domaintools.com
  tags:
  - Information
  properties:
  - type: OpenAPI
    url: openapi/domaintools-information-api-openapi.yml
  - type: APIReference
    url: https://docs.domaintools.com/api/iris/reference/
- aid: domaintools:domaintools-iris-detect-api
  name: DomainTools Iris Detect API
  description: 'Iris Detect is an Internet infrastructure detection, monitoring, and enforcement tool.

    It rapidly discovers malicious domains that are engaged in brand impersonation, risk-scores them within minutes, and supports
    your automation of detection, escalation, and enforcement actions.'
  humanURL: https://docs.domaintools.com/api/iris/
  baseURL: https://api.domaintools.com
  tags:
  - Iris Detect
  properties:
  - type: OpenAPI
    url: openapi/domaintools-iris-detect-api-openapi.yml
  - type: APIReference
    url: https://docs.domaintools.com/api/iris/reference/
- aid: domaintools:domaintools-iris-enrich-api
  name: DomainTools Iris Enrich API
  description: Designed to support high query volumes with batch processing and fast response times, the Iris Enrich API provides
    actionable insights-at-scale with enterprise-scale ingestion of DomainTools data
  humanURL: https://docs.domaintools.com/api/iris/
  baseURL: https://api.domaintools.com
  tags:
  - Iris Enrich
  properties:
  - type: OpenAPI
    url: openapi/domaintools-iris-enrich-api-openapi.yml
  - type: APIReference
    url: https://docs.domaintools.com/api/iris/reference/
- aid: domaintools:domaintools-iris-investigate-api
  name: DomainTools Iris Investigate API
  description: The Iris Investigate API is ideally suited for investigate and orchestrate use cases at human scale. Identify
    threats, map adversary infrastructure, and streamline investigations.
  humanURL: https://docs.domaintools.com/api/iris/
  baseURL: https://api.domaintools.com
  tags:
  - Iris Investigate
  properties:
  - type: OpenAPI
    url: openapi/domaintools-iris-investigate-api-openapi.yml
  - type: APIReference
    url: https://docs.domaintools.com/api/iris/reference/
- aid: domaintools:domaintools-lookups-api
  name: DomainTools Lookups API
  description: Endpoints for retrieving detailed information about domains and IPs, and for finding connections between domains
    and infrastructure.
  humanURL: https://docs.domaintools.com/api/iris/
  baseURL: https://api.domaintools.com
  tags:
  - Lookups
  properties:
  - type: OpenAPI
    url: openapi/domaintools-lookups-api-openapi.yml
  - type: APIReference
    url: https://docs.domaintools.com/api/iris/reference/
- aid: domaintools:domaintools-monitors-api
  name: DomainTools Monitors API
  description: Endpoints for monitoring new domain registrations, changes to IP ranges, and other key infrastructure events
    based on specific terms.
  humanURL: https://docs.domaintools.com/api/iris/
  baseURL: https://api.domaintools.com
  tags:
  - Monitors
  properties:
  - type: OpenAPI
    url: openapi/domaintools-monitors-api-openapi.yml
  - type: APIReference
    url: https://docs.domaintools.com/api/iris/reference/
- aid: domaintools:domaintools-ping-api
  name: DomainTools Ping API
  description: The Ping API from DomainTools — 1 operation(s) for ping.
  humanURL: https://docs.domaintools.com/api/iris/
  baseURL: https://api.domaintools.com
  tags:
  - Ping
  properties:
  - type: OpenAPI
    url: openapi/domaintools-ping-api-openapi.yml
  - type: APIReference
    url: https://docs.domaintools.com/api/iris/reference/
- aid: domaintools:domaintools-rate-limit-api
  name: DomainTools Rate Limit API
  description: The Rate Limit API from DomainTools — 1 operation(s) for rate limit.
  humanURL: https://docs.domaintools.com/api/iris/
  baseURL: https://api.domaintools.com
  tags:
  - Rate-Limit
  tags_raw:
  - Rate Limit
  properties:
  - type: OpenAPI
    url: openapi/domaintools-rate-limit-api-openapi.yml
  - type: APIReference
    url: https://docs.domaintools.com/api/iris/reference/
- aid: domaintools:domaintools-rdata-lookups-api
  name: DomainTools rdata Lookups API
  description: The rdata Lookups API from DomainTools — 4 operation(s) for rdata lookups.
  humanURL: https://docs.domaintools.com/api/iris/
  baseURL: https://api.domaintools.com
  tags:
  - rdata Lookups
  properties:
  - type: OpenAPI
    url: openapi/domaintools-rdata-lookups-api-openapi.yml
  - type: APIReference
    url: https://docs.domaintools.com/api/iris/reference/
- aid: domaintools:domaintools-rrset-lookups-api
  name: DomainTools rrset Lookups API
  description: The rrset Lookups API from DomainTools — 6 operation(s) for rrset lookups.
  humanURL: https://docs.domaintools.com/api/iris/
  baseURL: https://api.domaintools.com
  tags:
  - rrset Lookups
  properties:
  - type: OpenAPI
    url: openapi/domaintools-rrset-lookups-api-openapi.yml
  - type: APIReference
    url: https://docs.domaintools.com/api/iris/reference/
- aid: domaintools:domaintools-siebatchd-api
  name: DomainTools Siebatchd API
  description: The Siebatchd API from DomainTools — 4 operation(s) for siebatchd.
  humanURL: https://docs.domaintools.com/api/iris/
  baseURL: https://api.domaintools.com
  tags:
  - Siebatchd
  properties:
  - type: OpenAPI
    url: openapi/domaintools-siebatchd-api-openapi.yml
  - type: APIReference
    url: https://docs.domaintools.com/api/iris/reference/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/domaintools-capability-edges.yml
  name: DomainTools Business Capability Map
- type: Overlay
  url: overlays/domaintools-dnsdb-overlay.yaml
- type: DeveloperPortal
  url: https://docs.domaintools.com/
- type: Documentation
  url: https://docs.domaintools.com/
- type: APIReference
  url: https://docs.domaintools.com/api/iris/reference/
- type: GettingStarted
  url: https://docs.domaintools.com/api/iris/
- type: Authentication
  url: authentication/domaintools-authentication.yml
- type: Blog
  url: https://www.domaintools.com/resources/blog/
- type: Support
  url: https://www.domaintools.com/support
- type: GitHubOrganization
  url: https://github.com/DomainTools
- type: SignUp
  url: https://www.domaintools.com/demo
- type: TermsOfService
  url: https://www.domaintools.com/company/terms-of-service/
- type: PrivacyPolicy
  url: https://www.domaintools.com/company/privacy-policy/
- type: ChangeLog
  url: changelog/domaintools-changelog.yml
- type: StatusPage
  url: https://domaintools.statuspage.io
- type: Deprecation
  url: lifecycle/domaintools-lifecycle.yml
- type: Lifecycle
  url: lifecycle/domaintools-lifecycle.yml
- type: MCPServer
  url: mcp/domaintools-mcp.yml
- type: Packages
  url: packages/domaintools-packages.yml
- type: SDKs
  url: packages/domaintools-packages.yml
- type: CLI
  url: cli/domaintools-cli.yml
- type: LLMsTxt
  url: llms/domaintools-llms.txt
- type: Conventions
  url: conventions/domaintools-conventions.yml
- type: ErrorCatalog
  url: errors/domaintools-problem-types.yml
- type: Conformance
  url: conformance/domaintools-conformance.yml
- type: DataModel
  url: data-model/domaintools-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
- type: WellKnown
  url: well-known/domaintools-well-known.yml
- type: AgenticAccess
  url: agentic-access/domaintools-agentic-access.yml
- type: DomainSecurity
  url: security/domaintools-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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