Estated

Estated is a property-data company that operates a JSON REST API returning detailed U.S. residential and commercial property records — assessor data, parcel geometry, structure characteristics, taxes, assessments, market assessments, valuation (AVM), owner of record, deeds, and parcel boundaries. Lookups can be performed by split address, parsed address components, a single combined address string, or by FIPS county code + assessor parcel number (APN). The current public surface is the Property Data API v4 at `https://apis.estated.com/v4/property`, authenticated with a `token` query parameter. Estated was acquired by ATTOM Data in 2020 and its infrastructure is being migrated to ATTOM; the Estated developer documentation is scheduled to be deprecated during 2026, after which property data access will be served through ATTOM's documentation and endpoints. Existing Estated tokens continue to work through the transition and no integration changes are required during the migration window.

Estated publishes 1 API contract indexed on the APIs.io network: Property API. Tagged areas include Property Data, Real Estate, Property Records, Assessor, and APN.

The Estated catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Estated’s developer surface includes authentication, documentation, signup flow, GitHub presence, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

40.4/100 developing ▬ flat Agent 29/100 agent ready Front door AI 1/6 silent Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Property Data Real Estate Property RecordsAssessorAPNFIPSDeedsAVM Valuation Boundaries GISOwner Of RecordTax AssessmentLand Parcels Acquired

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Data & Reference Information Services

AE-230

Property

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 40.4/100 · developing

Contract Quality 13.3 / 21

Developer Ergonomics 3.6 / 17

Access Clarity 7.2 / 17

Operational Transparency 0.6 / 11

Contract Governance 2.8 / 10

Discoverability 5.6 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 29/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Agent Skills +5 pts — skills artifact present, graded by who authored it

4 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 21.4 — up to +15.7 composite points
Operational Transparency scores 5.3 — up to +12.3 composite points
Access Clarity scores 42.1 — up to +11.6 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/estated/apis.yml: open an issue on github.com/api-evangelist/estated 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Real Estate and Proptech	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 1

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

Estated Property API

The Property API from Estated — 1 operation(s) for property.

Open Collections 2

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

Estated Data Property API

OPEN COLLECTION

Estated Property Data API

OPEN COLLECTION

Estated API pricing

Not yet checked against Estated's own pricing page. Compiled by API Evangelist; confirm before you rely on a figure.

Plan	Price
Self-Serve / Developer usage-based	—
Subscription subscription	—
Bulk / Enterprise enterprise	—

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Estated Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Estated Rate Limits

0 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Estated

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Estated Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Estated Context

48 classes · 0 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Estated — jsonschema rules

5 rules · 4 warnings 1 info

SPECTRAL

Estated API Rules

4 rules · 1 errors 3 warnings

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Estated Property

11 properties

JSON SCHEMA

Examples 1

Example request and response payloads for these APIs.

Estated Get Property Example

2 fields

EXAMPLE

Security Posture 2

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

Estated Authentication

apiKey · 1 scheme

SECURITY

Estated Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Estated Agentic Access

1 operation

1 operations · 0 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Signup

Signup

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

Schema

Schema

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub

GitHub

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Contact

Contact

Commercial 4

Pricing, plans, and the legal terms of use

Plans

FinOps

TermsOfService

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 5

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Developers

Developers

ParentCompany

ParentCompany

AcquisitionAnnouncement

AcquisitionAnnouncement

ParentCompanyProduct

ParentCompanyProduct

Source (apis.yml)

aid: estated
name: Estated
description: Estated is a property-data company that operates a JSON REST API returning detailed U.S. residential and commercial
  property records — assessor data, parcel geometry, structure characteristics, taxes, assessments, market assessments, valuation
  (AVM), owner of record, deeds, and parcel boundaries. Lookups can be performed by split address, parsed address components,
  a single combined address string, or by FIPS county code + assessor parcel number (APN). The current public surface is the
  Property Data API v4 at `https://apis.estated.com/v4/property`, authenticated with a `token` query parameter. Estated was
  acquired by ATTOM Data in 2020 and its infrastructure is being migrated to ATTOM; the Estated developer documentation is
  scheduled to be deprecated during 2026, after which property data access will be served through ATTOM's documentation and
  endpoints. Existing Estated tokens continue to work through the transition and no integration changes are required during
  the migration window.
type: API
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: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
position: Producing
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/estated.png
x-status: acquired
x-acquired-by: attomdata
x-acquired-date: '2022-08-16'
x-status-source: https://www.attomdata.com/news/company-news/attom-company-announcement-10/
x-status-evidence: 'ATTOM announced its acquisition of Estated on 2022-08-16 (also Inman, 2022-08-16: https://www.inman.com/2022/08/16/attom-acquires-property-data-company-estated/);
  estated.com now reads ''Estated is now part of ATTOM Data'' and keeps the legacy Estated API docs (checked 2026-10-08, roadmap#925)'
tags:
- Property Data
- Real Estate
- Property Records
- Assessor
- APN
- FIPS
- Deeds
- AVM
- Valuation
- Boundaries
- GIS
- Owner Of Record
- Tax Assessment
- Land Parcels
- Acquired
tags_raw:
- Property Data
- Real Estate
- Property Records
- Assessor
- APN
- FIPS
- Deeds
- AVM
- Valuation
- Boundaries
- GIS
- Owner Of Record
- Tax Assessment
- Real-Estate
- Land Parcels
- Acquired
url: https://raw.githubusercontent.com/api-evangelist/estated/refs/heads/main/apis.yml
created: '2026-05-25'
modified: '2026-05-25'
specificationVersion: '0.23'
apis:
- aid: estated:estated-property-api
  name: Estated Property API
  description: The Property API from Estated — 1 operation(s) for property.
  humanURL: https://estated.com/developers/docs/v4
  baseURL: https://apis.estated.com
  tags:
  - Property
  properties:
  - type: OpenAPI
    url: openapi/estated-property-api-openapi.yml
  - type: Documentation
    url: https://estated.com/developers/docs/v4
  - type: Documentation
    url: https://estated.com/developers/docs/v4/property/overview
  - type: Documentation
    url: https://estated.com/developers/docs/v4/property/schema
  - type: Documentation
    url: https://estated.com/developers/docs/v4/property/values
  - type: Signup
    url: https://estated.com/login
  - type: JSONSchema
    url: json-schema/estated-property-schema.json
  - type: JSONLD
    url: json-ld/estated-context.jsonld
  - type: Examples
    url: examples/estated-get-property-example.json
  - type: SpectralRules
    url: rules/estated-rules.yml
  - type: Plans
    url: plans/estated-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/estated-rate-limits.yml
  - type: FinOps
    url: finops/estated-finops.yml
  - type: Vocabulary
    url: vocabulary/estated-vocabulary.yml
common:
- type: CapabilityMap
  url: capabilities/estated-capability-edges.yml
  name: Estated Business Capability Map
- type: Plans
  url: plans/estated-plans-pricing.yml
- type: RateLimits
  url: rate-limits/estated-rate-limits.yml
- type: FinOps
  url: finops/estated-finops.yml
- type: AgenticAccess
  url: agentic-access/estated-agentic-access.yml
- type: DomainSecurity
  url: security/estated-domain-security.yml
- type: Authentication
  url: authentication/estated-authentication.yml
- type: Website
  url: https://estated.com
- type: Developers
  url: https://estated.com/developers/docs/v4
- type: Documentation
  url: https://estated.com/developers/docs/v4/property/overview
- type: Schema
  url: https://estated.com/developers/docs/v4/property/schema
- type: Signup
  url: https://estated.com/login
- type: ParentCompany
  url: https://www.attomdata.com/
- type: AcquisitionAnnouncement
  url: https://www.attomdata.com/news/company-news/attom-company-announcement-10/
- type: ParentCompanyProduct
  url: https://www.attomdata.com/solutions/property-data-api/
- type: TermsOfService
  url: https://www.attomdata.com/terms-of-use/
- type: PrivacyPolicy
  url: https://www.attomdata.com/privacy/
- type: Contact
  url: https://www.attomdata.com/contact-us/
- type: GitHub
  url: https://github.com/estated
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-tags-removed:
- Parcel

Estated API — frequently asked questions

Does Estated have an API?

Yes. APIs.io lists 1 API from Estated, including Estated Property API.

Is there an OpenAPI specification for the Estated API?

Yes. APIs.io indexes 1 OpenAPI specification for Estated, each linked for download from this page.

How do I authenticate with the Estated API?

Estated uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Estated Authentication.

How much does the Estated API cost?

APIs.io lists 3 pricing plans for Estated, with each plan's price, limits and inclusions under Pricing on this page.

Is the Estated API ready for AI agents?

Estated has a Kin Score of 40.4 out of 100 (developing) and an Agent Readiness score of 28.9 (agent-ready), scored by API Evangelist on 2026-11-06.

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