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.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles DomainTools the way a machine reads it — 16 machine-readable artifacts across 12 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — DomainTools scores 52.0/100 (developing), with a separate agent-readiness read of 69/100 (agent native). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile DomainTools
Each block below is one kind of artifact we hold for DomainTools. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 12
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
DomainTools Flex search API
The Flex search API from DomainTools — 2 operation(s) for flex search.
DomainTools Information API
Access the latest information about your account, including service limits.
DomainTools Iris Detect API
Iris Detect is an Internet infrastructure detection, monitoring, and enforcement tool. It rapidly discovers malicious domains that are engaged in brand impersonation, risk-score...
DomainTools Iris Enrich API
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 o...
DomainTools Iris Investigate API
The Iris Investigate API is ideally suited for investigate and orchestrate use cases at human scale. Identify threats, map adversary infrastructure, and streamline investigations.
DomainTools Lookups API
Endpoints for retrieving detailed information about domains and IPs, and for finding connections between domains and infrastructure.
DomainTools Monitors API
Endpoints for monitoring new domain registrations, changes to IP ranges, and other key infrastructure events based on specific terms.
DomainTools Ping API
The Ping API from DomainTools — 1 operation(s) for ping.
DomainTools Rate Limit API
The Rate Limit API from DomainTools — 1 operation(s) for rate limit.
DomainTools rdata Lookups API
The rdata Lookups API from DomainTools — 4 operation(s) for rdata lookups.
DomainTools rrset Lookups API
The rrset Lookups API from DomainTools — 6 operation(s) for rrset lookups.
DomainTools Siebatchd API
The Siebatchd API from DomainTools — 4 operation(s) for siebatchd.
Scroll within the panel for all 12 ·
MCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
domaintools-mcp.yml
MCP SERVERSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for DomainTools — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 3
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 5
Pagination, idempotency, versioning, errors, and events
Build 4
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 4
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 1
The organization behind the API
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