Australian Business Register

The Australian Business Register (ABR), administered within the Australian Taxation Office (ATO), holds the publicly available information businesses provide when they register for an Australian Business Number (ABN). It exposes that data through ABN Lookup (abr.business.gov.au), hosted by the Department of Industry, Science and Resources, including free ABN Lookup web services: a SOAP/XML service (ABRXMLSearch, with WSDL) and JSON services for searching by ABN, ACN, name and postcode, available to registered users who accept the Web Services Agreement and obtain a GUID.

Australian Business Register is listed with 3 APIs on the APIs.io network. Tagged areas include Company, Government, Australia, Business Registry, and ABN.

Australian Business Register’s developer surface includes changelog, authentication, documentation, API reference, getting-started guide, signup flow, support, and 22 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

38.4/100 thin ▬ flat Agent 27/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

3 APIs

Company Government Australia Business RegistryABNTax Public Sector Open Data

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 38.4/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 9.3 / 17

Access Clarity 9.4 / 17

Operational Transparency 3.8 / 11

Contract Governance 1.9 / 10

Discoverability 6.1 / 9

Regulatory Posture 4.6 / 15

Agent readiness — 27/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Government & Public Sector regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

6 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Contract Governance scores 18.2 — up to +9.8 composite points
Developer Ergonomics scores 54.8 — up to +9.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/australian-business-register/apis.yml: open an issue on github.com/api-evangelist/australian-business-register to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 3

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

ABN Lookup XML Search Web Service (ABRXMLSearch)

SOAP/XML web service for ABN Lookup that searches the Australian Business Register by ABN, ACN/ASIC number, name, postcode, charity, ABN status and registration/update events. I...

ABN Lookup XML Search Web Service, RPC (ABRXMLSearchRPC)

RPC-style variant of the ABN Lookup SOAP web service, linked from the ABN Lookup web services methods page. It exposes the same search operations (27, without SearchByABNv202001...

ABN Lookup JSON Services

JSONP services for ABN Lookup (AbnDetails.aspx, AcnDetails.aspx, MatchingNames.aspx) that take a callback and the registered user's GUID. No machine-readable contract is publish...

Pricing Plans 1

Published pricing tiers and plan structures.

Australian Business Register Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Australian Business Register Rate Limits

0 limits

RATE LIMITS

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Australian Business Register Authentication

1 scheme

SECURITY

Australian Business Register Domain Security

TLSv1.3 · DMARC

SECURITY

Australian Business Register Vulnerability Disclosure

security.txt · contact published

SECURITY

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 1

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions

Lifecycle

ErrorCatalog

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

SampleCode

SampleCode

Access & Security 7

Authentication, authorization, and security posture

Security

Authentication

SecurityTxt

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Scroll for all 7

Operate 5

Status, limits, changes, and where to get help

ChangeLog

Deprecation

ChangeLog

Support

FAQ

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

About

About

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: australian-business-register
name: Australian Business Register
description: 'The Australian Business Register (ABR), administered within the Australian Taxation Office (ATO), holds the
  publicly available information businesses provide when they register for an Australian Business Number (ABN). It exposes
  that data through ABN Lookup (abr.business.gov.au), hosted by the Department of Industry, Science and Resources, including
  free ABN Lookup web services: a SOAP/XML service (ABRXMLSearch, with WSDL) and JSON services for searching by ABN, ACN,
  name and postcode, available to registered users who accept the Web Services Agreement and obtain a GUID.'
url: https://raw.githubusercontent.com/api-evangelist/australian-business-register/refs/heads/main/apis.yml
x-type: company
x-source: harvest:australia-apidays-2026
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-22 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-22'
modified: '2026-10-22'
tags:
- Company
- Government
- Australia
- Business Registry
- ABN
- Tax
- Public Sector
- Open Data
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://abr.business.gov.au/Images/logo-abnl.png
common:
- type: Plans
  url: plans/australian-business-register-plans-pricing.yml
- type: ChangeLog
  url: changelog/australian-business-register-changelog.yml
- type: Conventions
  url: conventions/australian-business-register-conventions.yml
- type: Security
  url: https://www.ato.gov.au/online-services/cyber-safety/report-a-system-security-vulnerability
- type: Authentication
  url: authentication/australian-business-register-authentication.yml
- type: Deprecation
  url: lifecycle/australian-business-register-lifecycle.yml
- type: Lifecycle
  url: lifecycle/australian-business-register-lifecycle.yml
- type: ErrorCatalog
  url: errors/australian-business-register-error-codes.yml
- type: Conformance
  url: conformance/australian-business-register-conformance.yml
- type: SecurityTxt
  url: well-known/australian-business-register-socket-security.txt
- type: SecurityTxt
  url: well-known/australian-business-register-security.txt
- type: SecurityTxt
  url: well-known/australian-business-register-abr-security.txt
- type: WellKnown
  url: well-known/australian-business-register-well-known.yml
- type: Hosts
  url: hosts/australian-business-register-hosts.yml
- type: VulnerabilityDisclosure
  url: security/australian-business-register-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/australian-business-register-domain-security.yml
- type: Website
  url: https://abr.gov.au/
- type: DeveloperPortal
  url: https://abr.business.gov.au/Tools/WebServices
- type: Documentation
  url: https://abr.business.gov.au/Documentation/Default
- type: APIReference
  url: https://abr.business.gov.au/Documentation/WebServiceMethods
- type: GettingStarted
  url: https://abr.business.gov.au/Documentation/WebServiceRegistration
- type: SignUp
  url: https://abr.business.gov.au/Documentation/WebServiceRegistration
- type: SampleCode
  url: https://abr.business.gov.au/Documentation/SampleCodeResources
- type: ChangeLog
  url: https://abr.business.gov.au/Documentation/ChangeControl
- type: Support
  url: https://abr.business.gov.au/ContactUs
- type: FAQ
  url: https://abr.business.gov.au/Faq
- type: TermsOfService
  url: https://abr.business.gov.au/Tools/WebServicesAgreement
- type: PrivacyPolicy
  url: https://abr.business.gov.au/Home/PrivacyPolicies
- type: About
  url: https://abr.business.gov.au/Home/About
apis:
- aid: australian-business-register:abn-lookup-xml-search-web-service
  name: ABN Lookup XML Search Web Service (ABRXMLSearch)
  description: SOAP/XML web service for ABN Lookup that searches the Australian Business Register by ABN, ACN/ASIC number,
    name, postcode, charity, ABN status and registration/update events. It is free to registered users who accept the Web
    Services Agreement and pass an authentication GUID. The provider-hosted WSDL (28 operations) is saved verbatim.
  humanURL: https://abr.business.gov.au/Documentation/WebServiceMethods
  baseURL: https://abr.business.gov.au/abrxmlsearch/AbrXmlSearch.asmx
  tags:
  - ABN
  - SOAP
  - Business Registry
  properties:
  - type: WSDL
    url: wsdl/australian-business-register-abrxmlsearch.wsdl
  - type: WSDL
    name: WSDL (provider-hosted)
    url: https://abr.business.gov.au/abrxmlsearch/AbrXmlSearch.asmx?WSDL
  - type: Documentation
    url: https://abr.business.gov.au/Documentation/WebServiceMethods
- aid: australian-business-register:abn-lookup-xml-search-rpc-web-service
  name: ABN Lookup XML Search Web Service, RPC (ABRXMLSearchRPC)
  description: RPC-style variant of the ABN Lookup SOAP web service, linked from the ABN Lookup web services methods page.
    It exposes the same search operations (27, without SearchByABNv202001). The provider-hosted WSDL is saved verbatim.
  humanURL: https://abr.business.gov.au/Documentation/WebServiceMethods
  baseURL: https://abr.business.gov.au/abrxmlsearchRPC/AbrXmlSearch.asmx
  tags:
  - ABN
  - SOAP
  properties:
  - type: WSDL
    url: wsdl/australian-business-register-abrxmlsearch-rpc.wsdl
  - type: WSDL
    name: WSDL (provider-hosted)
    url: https://abr.business.gov.au/abrxmlsearchRPC/AbrXmlSearch.asmx?WSDL
- aid: australian-business-register:abn-lookup-json-services
  name: ABN Lookup JSON Services
  description: JSONP services for ABN Lookup (AbnDetails.aspx, AcnDetails.aspx, MatchingNames.aspx) that take a callback and
    the registered user's GUID. No machine-readable contract is published for the JSON services.
  humanURL: https://abr.business.gov.au/json/
  baseURL: https://abr.business.gov.au/json/
  tags:
  - ABN
  - JSON
  properties:
  - type: Documentation
    url: https://abr.business.gov.au/json/
x-coverage:
  state: covered
  reason: identity-verified
  detail: Website https://abr.gov.au/ answered 302 to https://www.abr.gov.au/ (same registrable domain, ATO-run ABR); www.abr.gov.au
    timed out from our network (connection-level, not a block). Developer pointers verified 200 on abr.business.gov.au (ABN
    Lookup), whose About page states its data is owned and managed by the ABR within the ATO.
  evidence:
  - url: https://abr.gov.au/
    status: 302
  - url: https://abr.business.gov.au/Home/About
    status: 200
  - url: https://abr.business.gov.au/Tools/WebServices
    status: 200
  - url: https://abr.business.gov.au/Documentation/WebServiceMethods
    status: 200
  - url: https://abr.business.gov.au/abrxmlsearch/AbrXmlSearch.asmx?WSDL
    status: 200
  - url: https://abr.business.gov.au/json/
    status: 200
x-enrichment:
  date: '2026-10-22'
  status: enriched
  artifacts_added: 26
  pass: modular-v1
  engine: identity=anthropic,contract=anthropic,surfaces=anthropic,docs=anthropic,regulatory=anthropic

Australian Business Register API — frequently asked questions

Does Australian Business Register have an API?

Yes. APIs.io lists 3 APIs from Australian Business Register, including ABN Lookup XML Search Web Service (ABRXMLSearch), ABN Lookup XML Search Web Service, RPC (ABRXMLSearchRPC) and ABN Lookup JSON Services.

How do I authenticate with the Australian Business Register API?

Australian Business Register documents its authentication (1 scheme). The details are profiled on APIs.io as Australian Business Register Authentication.

How much does the Australian Business Register API cost?

APIs.io lists 1 pricing plan for Australian Business Register, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the Australian Business Register API ready for AI agents?

Australian Business Register has a Kin Score of 38.4 out of 100 (thin) and an Agent Readiness score of 27.0 (agent-aware), scored by API Evangelist on 2026-10-31.

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