Domain Group
Domain Group (Domain Holdings Australia Ltd, trading as domain.com.au) is the second of Australia's two national residential property portals, alongside REA Group's realestate.com.au, and since 27 August 2025 has been a wholly owned subsidiary of CoStar Group. Headquartered in Sydney, Domain operates the domain.com.au consumer marketplace plus commercial, agent, and developer-project brands, and sits in the middle of the Australian value chain between selling and leasing agencies on one side and buyers, renters, banks, and PropTech builders on the other. Unlike most of the real estate sector, Domain runs a genuine, self-serve public developer portal at developer.domain.com.au: a developer signs up with GitHub, Google, or email, creates a project, and is immediately granted the "Agents & Listings" and "Properties & Locations" packages, with the remaining eleven packages - Address Suggestions, Campaign reporting, Listings Management, Price Estimation, Property Enrichment, Property Package, PropertyRadar, Rental AVM, Schools Data, and Webhooks - added per project and negotiated with an account manager. Domain publishes three machine-readable OpenAPI 3.0.4 documents (latest, v1, v2) directly from its Libraries page, backs them with an OpenID Connect discovery document at auth.domain.com.au, and serves everything from api.domain.com.au behind API-key or OAuth 2.0 (client credentials, authorization code, implicit) credentials. Write access is a different gate entirely: uploading or updating listings requires sandbox sign-off by email to api@domain.com.au and written permission from the principal agent of each agency, making listing management broker-authorised even though the read surface is self-serve. Domain carries no RESO Web API or RESO Data Dictionary certification, exposes no OData $metadata document and no Universal Property Identifier - RESO is a North American NAR-driven standard with no presence in the Australian portal duopoly - and it publishes no open, unlicensed dataset; all data is licensed under the Domain Group API Terms and Conditions.
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 Domain Group the way a machine reads it — 37 machine-readable artifacts across 3 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 — Domain Group scores 48.0/100 (developing), with a separate agent-readiness read of 43/100 (agent ready). 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. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
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title="Domain Group on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/domain-group/card.svg"
alt="Domain Group Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile Domain Group
Each block below is one kind of artifact we hold for Domain Group. 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 28
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.
Domain Group Address Locators API
The AddressLocators API from Domain Group — 1 operation(s) for addresslocators.
Domain Group Agencies API
The Agencies API from Domain Group — 5 operation(s) for agencies.
Domain Group Agents API
The Agents API from Domain Group — 4 operation(s) for agents.
Domain Group Authorities API
The Authorities API from Domain Group — 6 operation(s) for authorities.
Domain Group Campaign Reporting API
The CampaignReporting API from Domain Group — 2 operation(s) for campaignreporting.
Domain Group Dataset API
The Dataset API from Domain Group — 1 operation(s) for dataset.
Domain Group Demographics API
The Demographics API from Domain Group — 1 operation(s) for demographics.
Domain Group Disclaimers API
The Disclaimers API from Domain Group — 2 operation(s) for disclaimers.
Domain Group Enquiries API
The Enquiries API from Domain Group — 2 operation(s) for enquiries.
Domain Group Leadscope API
The Leadscope API from Domain Group — 2 operation(s) for leadscope.
Domain Group Listings API
The Listings API from Domain Group — 18 operation(s) for listings.
Domain Group Listing Search API
The ListingSearch API from Domain Group — 2 operation(s) for listingsearch.
Domain Group Locations API
The Locations API from Domain Group — 1 operation(s) for locations.
Domain Group Me API
The Me API from Domain Group — 3 operation(s) for me.
Domain Group Pre Market API
The PreMarket API from Domain Group — 2 operation(s) for premarket.
Domain Group Products API
The Products API from Domain Group — 8 operation(s) for products.
Domain Group Projects API
The Projects API from Domain Group — 6 operation(s) for projects.
Domain Group Properties API
The Properties API from Domain Group — 10 operation(s) for properties.
Domain Group Property Avm API
The PropertyAvm API from Domain Group — 2 operation(s) for propertyavm.
Domain Group Property Features API
The PropertyFeatures API from Domain Group — 1 operation(s) for propertyfeatures.
Domain Group Property Like API
The PropertyLike API from Domain Group — 1 operation(s) for propertylike.
Domain Group Property Radar API
The PropertyRadar API from Domain Group — 7 operation(s) for propertyradar.
Domain Group Property Search API
The PropertySearch API from Domain Group — 1 operation(s) for propertysearch.
Domain Group Property Zoning Perils API
The PropertyZoningPerils API from Domain Group — 1 operation(s) for propertyzoningperils.
Domain Group Sales Results API
The SalesResults API from Domain Group — 5 operation(s) for salesresults.
Domain Group Schools API
The Schools API from Domain Group — 2 operation(s) for schools.
Domain Group Statistics API
The Statistics API from Domain Group — 6 operation(s) for statistics.
Domain Group Webhooks API
The Webhooks API from Domain Group — 2 operation(s) for webhooks.
Scroll within the panel for all 28 ·
Open Collections 3
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Event Specifications 2
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Domain Group Webhooks
Event surface for the Domain Public API. Domain does not publish an AsyncAPI document; this one is generated by API Evangelist strictly from Domain's published webhook documenta...
ASYNCAPIDomain Group Webhooks
ASYNCAPISecurity 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.
Scopes 1
OAuth scopes are the vocabulary of least-privilege access. Profiling them shows exactly what an integration — or an agent acting on a user's behalf — is allowed to do.
OAuth scopes governing access to this provider's APIs.
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 Domain Group — 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 5
Portal, sign-up, and the first successful call
Documentation 7
Reference material describing how the API behaves
Scroll within the panel for all 7 ·
Agent Surfaces 12
MCP servers, agent skills, and machine-readable catalogs
Scroll within the panel for all 12 ·
Design & Contract 8
Pagination, idempotency, versioning, errors, and events
Scroll within the panel for all 8 ·
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 4
Authentication, authorization, and security posture
Operate 4
Status, limits, changes, and where to get help
Commercial 1
Pricing, plans, and the legal terms of use
Company 1
The organization behind the API
Other 7
Properties that don't map to a standard resource type
Scroll within the panel for all 7 ·
← All providers · Data indexed from github.com/api-evangelist/domain-group · machine-readable index on apis.io
This is an independent, third-party profile of Domain Group, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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