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 [email protected] 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 — 20 machine-readable artifacts across 13 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 49.0/100 (developing), with a separate agent-readiness read of 82/100 (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 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 13
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 Address Suggestions API
Search for valid Australian property addresses and resolve them to Domain property identifiers. Backed by GET /v1/properties/_suggest and GET /v1/addressLocators. Requires the a...
Domain Agents & Listings API
Access data on agencies, agents, and for-sale, for-rent, commercial, business, and project listings directly from Domain. Covers agency and agent search and profiles, residentia...
Domain Campaign API
Lets authenticated media agencies retrieve advertising campaign performance metrics for Domain listings and developer projects, via GET /v1/campaign/listing-performance and GET ...
Domain Campaign API - Preview
Preview channel of the Campaign API, giving authorised media agencies early access to campaign performance metrics ahead of general release. Documented as a separate API package...
Domain Listings Management API
View, create, and update residential, commercial, business, project, and off-market listings on domain.com.au, and manage the resulting enquiries, listing reports, and performan...
Domain Price Estimation API
Returns the current automated price estimate for a Domain property identifier via GET /v1/properties/{propertyId}/priceEstimate, including lower, mid, and upper price, a confide...
Domain Properties & Locations API
Property records, address locators, location profiles, weekend auction and sales results, suburb performance and historical statistics, and suburb demographics. Granted automati...
Domain Property Enrichment API
Enhances a known property with additional Domain-held detail through GET /v1/propertyenrichment, alongside the v2 property features and zoning/perils endpoints. Sold as a separa...
Domain Property Package API
A bundled package giving comprehensive property coverage in one subscription - address suggestion, property records, price estimates, residential listing search, location profil...
Domain PropertyRadar API
Create and manage watchlist portfolios of properties and read them back in summary or full form, including lookup by G-NAF address identifier. Covers POST/GET/DELETE on /v1/prop...
Domain Rental AVM API
Automated rental estimates for a Domain property identifier via GET /v1/properties/{propertyId}/rentalEstimate, plus the /v1/avm and /v1/avmReport endpoints. Requires the api_av...
Domain Schools Data API
Detailed information on Australian schools, retrievable by school identifier (GET /v2/schools/{id}) or by latitude and longitude (GET /v2/schools/{latitude}/{longitude}) for sch...
Domain Webhooks API
Subscription management for push notifications when data changes in the Domain system. Create, read, list, and delete webhook subscriptions via /v1/webhooks/{id}/subscriptions a...
Scroll within the panel for all 13 ·
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.
domain-group-mcp.yml
MCP SERVEREvent 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 6
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/domain-group · machine-readable index on apis.io