RealEstateAPI

RealEstateAPI.com offers expressive property data APIs designed for building prop-tech applications. The platform exposes nationwide US property records including ownership, valuations, MLS listings, comparables, parcel boundary data, skip tracing, and involuntary liens through a unified JSON REST API.

RealEstateAPI publishes 8 API contracts indexed on the APIs.io network, including AVM API, Comparables API, Liens API, and 5 more. Tagged areas include Real Estate, Property Data, MLS, Valuation, and Geospatial.

The RealEstateAPI catalog on APIs.io includes 1 Spectral governance ruleset.

RealEstateAPI’s developer surface includes authentication, developer portal, documentation, pricing, signup flow, engineering blog, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

31.3/100 thin ▬ flat Agent 20/100 agent aware Front door AI 1/6 silent Heartbeat 60/100 alive saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Real Estate Property Data MLS Valuation GeospatialSkip TracingPropTech

What this lets a business do 2

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

Real Estate Valuation & Appraisal Management

BC-4970

AVM

POST /v2/AVM

Real Estate Brokerage Management

BC-4960

MLS

POST /v2/MLSSearch POST /v2/MLSDetail

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 31.3/100 · thin

Contract Quality 8.9 / 19

Developer Ergonomics 5.0 / 15

Access Clarity 3.8 / 15

Operational Transparency 1.2 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 0.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 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 0 / 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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 Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →

9 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 25.5 — up to +14.9 composite points Ask about this →
Developer Ergonomics scores 33.3 — up to +13.3 composite points Ask about this →
Contract Quality scores 47.4 — up to +13.2 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/realestateapi/apis.yml: open an issue on github.com/api-evangelist/realestateapi 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 →

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 8

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

RealEstateAPI AVM API

Automated valuation model

RealEstateAPI Comparables API

Comparable property analytics

RealEstateAPI Liens API

Involuntary lien records

RealEstateAPI MLS API

MLS listing data

RealEstateAPI Parcel API

Parcel boundary and GIS data

RealEstateAPI Property Detail API

Detailed property records

RealEstateAPI Property Search API

Search and filter properties

RealEstateAPI Skip Trace API

Owner contact tracing

Scroll for all 8

Open Collections 9

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

RealEstate AVM API

OPEN COLLECTION

RealEstate AVM Comparables API

OPEN COLLECTION

RealEstate AVM Liens API

OPEN COLLECTION

RealEstate AVM MLS API

OPEN COLLECTION

RealEstate AVM Parcel API

OPEN COLLECTION

RealEstate AVM Property Detail API

OPEN COLLECTION

RealEstate AVM Property Search API

OPEN COLLECTION

RealEstate AVM Skip Trace API

OPEN COLLECTION

RealEstateAPI

OPEN COLLECTION

Scroll for all 9

RealEstateAPI pricing

Not yet checked against RealEstateAPI's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against RealEstateAPI's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

RealEstateAPI Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

RealEstateAPI Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

RealEstateAPI Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

RealEstateAPI API Rules

47 rules · 45 error-severity 1 warn-severity 1 info-severity

SPECTRAL

Security Posture 2

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

RealEstateAPI Authentication

apiKey · 1 scheme

SECURITY

RealEstateAPI Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

RealEstateAPI Agentic Access

9 operations · 3 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

Portal

Portal

Signup

Signup

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

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 5

Pricing, plans, and the legal terms of use

Plans

FinOps

Pricing

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: realestateapi
name: RealEstateAPI
description: RealEstateAPI.com offers expressive property data APIs designed for building prop-tech applications. The platform
  exposes nationwide US property records including ownership, valuations, MLS listings, comparables, parcel boundary data,
  skip tracing, and involuntary liens through a unified JSON REST API.
type: Index
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: '2026-11-13'
  method: derived
position: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/realestateapi.png
x-docs-platform: readme
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
tags:
- Real Estate
- Property Data
- MLS
- Valuation
- Geospatial
- Skip Tracing
- PropTech
tags_raw:
- Real Estate
- Property Data
- MLS
- Valuation
- Geospatial
- Skip Tracing
- Prop-Tech
- Real-Estate
url: https://raw.githubusercontent.com/api-evangelist/realestateapi/refs/heads/main/apis.yml
created: '2026-03-16'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: realestateapi:realestateapi-avm-api
  name: RealEstateAPI AVM API
  description: Automated valuation model
  humanURL: https://www.realestateapi.com/
  baseURL: https://api.realestateapi.com
  tags:
  - AVM
  properties:
  - type: OpenAPI
    url: openapi/realestateapi-avm-api-openapi.yml
  - type: Documentation
    url: https://developer.realestateapi.com/reference/getting-started
  - type: PropertySearch
    url: https://developer.realestateapi.com/reference/property-search-api
  - type: Signup
    url: https://app.realestateapi.com/signup
- aid: realestateapi:realestateapi-comparables-api
  name: RealEstateAPI Comparables API
  description: Comparable property analytics
  humanURL: https://www.realestateapi.com/
  baseURL: https://api.realestateapi.com
  tags:
  - Comparables
  properties:
  - type: OpenAPI
    url: openapi/realestateapi-comparables-api-openapi.yml
  - type: Documentation
    url: https://developer.realestateapi.com/reference/getting-started
  - type: PropertySearch
    url: https://developer.realestateapi.com/reference/property-search-api
  - type: Signup
    url: https://app.realestateapi.com/signup
- aid: realestateapi:realestateapi-liens-api
  name: RealEstateAPI Liens API
  description: Involuntary lien records
  humanURL: https://www.realestateapi.com/
  baseURL: https://api.realestateapi.com
  tags:
  - Liens
  properties:
  - type: OpenAPI
    url: openapi/realestateapi-liens-api-openapi.yml
  - type: Documentation
    url: https://developer.realestateapi.com/reference/getting-started
  - type: PropertySearch
    url: https://developer.realestateapi.com/reference/property-search-api
  - type: Signup
    url: https://app.realestateapi.com/signup
- aid: realestateapi:realestateapi-mls-api
  name: RealEstateAPI MLS API
  description: MLS listing data
  humanURL: https://www.realestateapi.com/
  baseURL: https://api.realestateapi.com
  tags:
  - MLS
  properties:
  - type: OpenAPI
    url: openapi/realestateapi-mls-api-openapi.yml
  - type: Documentation
    url: https://developer.realestateapi.com/reference/getting-started
  - type: PropertySearch
    url: https://developer.realestateapi.com/reference/property-search-api
  - type: Signup
    url: https://app.realestateapi.com/signup
- aid: realestateapi:realestateapi-parcel-api
  name: RealEstateAPI Parcel API
  description: Parcel boundary and GIS data
  humanURL: https://www.realestateapi.com/
  baseURL: https://api.realestateapi.com
  tags:
  - Parcel
  properties:
  - type: OpenAPI
    url: openapi/realestateapi-parcel-api-openapi.yml
  - type: Documentation
    url: https://developer.realestateapi.com/reference/getting-started
  - type: PropertySearch
    url: https://developer.realestateapi.com/reference/property-search-api
  - type: Signup
    url: https://app.realestateapi.com/signup
- aid: realestateapi:realestateapi-property-detail-api
  name: RealEstateAPI Property Detail API
  description: Detailed property records
  humanURL: https://www.realestateapi.com/
  baseURL: https://api.realestateapi.com
  tags:
  - Property Detail
  properties:
  - type: OpenAPI
    url: openapi/realestateapi-property-detail-api-openapi.yml
  - type: Documentation
    url: https://developer.realestateapi.com/reference/getting-started
  - type: PropertySearch
    url: https://developer.realestateapi.com/reference/property-search-api
  - type: Signup
    url: https://app.realestateapi.com/signup
- aid: realestateapi:realestateapi-property-search-api
  name: RealEstateAPI Property Search API
  description: Search and filter properties
  humanURL: https://www.realestateapi.com/
  baseURL: https://api.realestateapi.com
  tags:
  - Property Search
  properties:
  - type: OpenAPI
    url: openapi/realestateapi-property-search-api-openapi.yml
  - type: Documentation
    url: https://developer.realestateapi.com/reference/getting-started
  - type: PropertySearch
    url: https://developer.realestateapi.com/reference/property-search-api
  - type: Signup
    url: https://app.realestateapi.com/signup
- aid: realestateapi:realestateapi-skip-trace-api
  name: RealEstateAPI Skip Trace API
  description: Owner contact tracing
  humanURL: https://www.realestateapi.com/
  baseURL: https://api.realestateapi.com
  tags:
  - Skip Trace
  properties:
  - type: OpenAPI
    url: openapi/realestateapi-skip-trace-api-openapi.yml
  - type: Documentation
    url: https://developer.realestateapi.com/reference/getting-started
  - type: PropertySearch
    url: https://developer.realestateapi.com/reference/property-search-api
  - type: Signup
    url: https://app.realestateapi.com/signup
common:
- type: Plans
  url: plans/realestateapi-plans-pricing.yml
- type: RateLimits
  url: rate-limits/realestateapi-rate-limits.yml
- type: FinOps
  url: finops/realestateapi-finops.yml
- type: Website
  url: https://www.realestateapi.com/
- type: CapabilityMap
  url: capabilities/realestateapi-capability-edges.yml
  name: RealEstateAPI Business Capability Map
- type: AgenticAccess
  url: agentic-access/realestateapi-agentic-access.yml
- type: DomainSecurity
  url: security/realestateapi-domain-security.yml
- type: Authentication
  url: authentication/realestateapi-authentication.yml
- type: GitHubOrganization
  url: https://github.com/realestateapi
- type: LinkedIn
  url: https://www.linkedin.com/company/realestateapi
- type: Portal
  url: https://www.realestateapi.com/
- type: Documentation
  url: https://developer.realestateapi.com/
- type: Pricing
  url: https://www.realestateapi.com/pricing/
- type: Signup
  url: https://app.realestateapi.com/signup
- type: Login
  url: https://app.realestateapi.com/login
- type: Blog
  url: https://www.realestateapi.com/blog/
- type: Contact
  url: https://www.realestateapi.com/contact/
- type: TermsOfService
  url: https://www.realestateapi.com/terms-of-service/
- type: PrivacyPolicy
  url: https://www.realestateapi.com/privacy-policy/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

RealEstateAPI — frequently asked questions

Does RealEstateAPI have an API?

Yes. APIs.io lists 8 APIs from RealEstateAPI, including RealEstateAPI AVM API, RealEstateAPI Comparables API and RealEstateAPI Liens API, and 5 more.

Is there an OpenAPI specification for the RealEstateAPI?

Yes. APIs.io indexes 8 OpenAPI specifications for RealEstateAPI, each linked for download from this page.

How do I authenticate with the RealEstateAPI?

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

How much does the RealEstateAPI cost?

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

Is the RealEstateAPI ready for AI agents?

RealEstateAPI has a Kin Score of 31.3 out of 100 (thin) and an Agent Readiness score of 19.6 (agent-aware), scored by API Evangelist on 2026-11-13.

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Tools for providers

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get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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curl "https://apis.io/api/v1/providers/realestateapi"

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Every operation they expose

curl "https://apis.io/api/v1/providers/realestateapi/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/realestateapi/evidence"

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