ATTOM

ATTOM Data Solutions is a national property, real estate, and location data provider that curates a multi-sourced warehouse of data on 158+ million U.S. properties. The ATTOM API (also delivered as ATTOM Cloud) exposes that data over REST as a family of logical resources - property characteristics, tax assessments, automated valuations (AVM), sales and deed history, mortgage records, area and boundary geographies, schools, community and neighborhood data, points of interest, transportation noise, all-event snapshots, and home equity - queried by address, APN/FIPS, ATTOM ID, radius, or geoIdV4 and authenticated with an API key.

12 APIs 0 Features
Property DataReal EstateLocation DataValuationAVMAssessmentMortgageNeighborhood

APIs

ATTOM Property API

Core property characteristics for a single property or a list of properties, queried by address, APN/FIPS, ATTOM ID, or radius. Includes the basic profile, detail, expanded prof...

ATTOM Assessment API

County tax assessment data - assessed and market values, tax amounts, exemptions, and the assessment history for a property, via the assessment detail, assessment snapshot, and ...

ATTOM AVM & Valuation API

Automated Valuation Model estimates for a property, including the ATTOM AVM detail, AVM snapshot, AVM history, and rental AVM packages, returning an estimated value with a confi...

ATTOM Sales & Deed API

Recorded sale and deed transactions plus multi-year sales history and sales trends - sale detail, sale snapshot, sales history (basic/expanded), and aggregated sales-trend count...

ATTOM Mortgage API

Property records enriched with mortgage and lender information via the detail-with-mortgage and detail-with-mortgage-and-owner packages, returning loan amounts, lenders, loan ty...

ATTOM Area & Boundary API

Geography services that resolve and describe ATTOM area codes - geoId/geoIdV4 lookups by name and geography type, area hierarchy lookups, location lookups, and boundary geometry...

ATTOM School API

School and school-district data - search schools near a location or attendance zone, retrieve an individual school profile with ratings and enrollment, get district details, and...

ATTOM Community & Neighborhood API

Neighborhood and community context for a place or geoIdV4 - climate, crime, demographics, natural hazards, education, commute, and quality-of-life indicators returned by the v4 ...

ATTOM POI API

Points-of-interest search returning nearby businesses and amenities - grocery, dining, schools, parks, healthcare, and more - within a radius or area, plus a POI category lookup...

ATTOM Transportation Noise API

Modeled transportation-noise scores for a location, estimating noise exposure from road, rail, and air traffic at a set of coordinates or for a property.

ATTOM AllEvents & Snapshot API

A consolidated view of every event on a property - assessment, AVM, sale, deed, and mortgage - in a single call via the allevents detail and snapshot packages, ideal for buildin...

ATTOM Home Equity API

Estimated home equity for a property, combining the AVM value with outstanding mortgage balances to return an estimated equity position and loan-to-value indication via the valu...

Collections

ATTOM API

OPEN

Pricing Plans

Attom Data Plans Pricing

3 plans

PLANS

Rate Limits

Attom Data Rate Limits

5 limits

RATE LIMITS

FinOps

Resources

🔗
DomainSecurity
DomainSecurity
🔑
Authentication
Authentication
🔗
LinkedIn
LinkedIn
🔗
Website
Website
🔗
Documentation
Documentation
🔗
Plans
Plans
🔗
RateLimits
RateLimits
📰
Blog
Blog
🔗
FinOps
FinOps

Sources

Raw ↑
opencollection: 1.0.0
info:
  name: ATTOM API
  version: 1.0.0
request:
  auth:
    type: apikey
    apikey:
      key: apikey
      value: '{{apiKey}}'
      in: header
items:
- info:
    name: Property
    type: folder
  items:
  - info:
      name: Property ID lookup
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/property/id?address1=4529 Winona Court&address2=Denver, CO
    docs: Returns the ATTOM-assigned property ID and minimal identity fields for matching properties.
  - info:
      name: Property basic profile
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/property/basicprofile?address=4529 Winona Court, Denver, CO
    docs: Essential property profile - address, location, lot, and building basics - for a specific address or APN/FIPS.
  - info:
      name: Property detail
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/property/detail?attomid=145423726
    docs: Comprehensive property characteristics for a property or list of properties.
  - info:
      name: Property expanded profile
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/property/expandedprofile?address1=4529 Winona Court&address2=Denver,
        CO
    docs: Extended property profile combining characteristics, most-recent sale, assessment, and AVM in one call.
  - info:
      name: Property address radius search
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/property/address?latitude=39.780062&longitude=-105.043284&radius=1
    docs: Radius search returning all properties within a given radius (miles) of coordinates.
  - info:
      name: Property snapshot
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/property/snapshot?postalcode=80212
    docs: Returns properties in an area matching characteristic filters such as beds, baths, size, value, and lot size.
  - info:
      name: Property detail with owner
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/property/detailowner?attomid=145423726
    docs: Property characteristics plus current owner names and mailing information.
  - info:
      name: Property building permits
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/property/buildingpermits?attomid=145423726
    docs: Building permit records for a property.
- info:
    name: Assessment
    type: folder
  items:
  - info:
      name: Assessment detail
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/assessment/detail?attomid=145423726
    docs: County assessment data - assessed and market values, tax amounts, and exemptions - for a property.
  - info:
      name: Assessment snapshot
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/assessment/snapshot?postalcode=80212
    docs: Assessment summary for properties in an area matching value or characteristic filters.
  - info:
      name: Assessment history detail
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/assessmenthistory/detail?attomid=145423726
    docs: Historical assessment records for a property.
- info:
    name: Valuation (AVM)
    type: folder
  items:
  - info:
      name: ATTOM AVM detail
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/attomavm/detail?address1=4529 Winona Court&address2=Denver,
        CO
    docs: Detailed AVM calculation for a property - estimated value, confidence score, and high/low value range.
  - info:
      name: AVM snapshot
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/avm/snapshot?postalcode=80212
    docs: Automated Valuation Model summary for properties in an area.
  - info:
      name: AVM history detail
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/avmhistory/detail?attomid=145423726
    docs: Historical AVM values for a property over time.
  - info:
      name: Rental AVM
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/valuation/rentalavm?attomid=145423726
    docs: Estimated market rent (rental AVM) for a property, with a value range.
- info:
    name: Home Equity
    type: folder
  items:
  - info:
      name: Home equity
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/valuation/homeequity?attomid=145423726
    docs: Estimated home equity for a property, combining the AVM value with outstanding mortgage balances to return an equity
      position and loan-to-value indication.
- info:
    name: Sales & Deed
    type: folder
  items:
  - info:
      name: Sale detail
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/sale/detail?attomid=145423726
    docs: Recorded sale transaction detail for a property.
  - info:
      name: Sale snapshot
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/sale/snapshot?postalcode=80212&startSaleSearchDate=2024-01-01&endSaleSearchDate=2024-12-31
    docs: Sale transactions for properties in an area over a date range.
  - info:
      name: Sales history detail
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/saleshistory/detail?attomid=145423726
    docs: Up to ~10 years of recorded sales history for a property.
  - info:
      name: Sales history (basic)
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/saleshistory/basichistory?attomid=145423726
    docs: Essential sales history records for a property.
  - info:
      name: Sales history (expanded)
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/saleshistory/expandedhistory?attomid=145423726
    docs: Extended sales history records, including transaction and mortgage context, for a property.
  - info:
      name: Sales trend
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/transaction/salestrend?geoIdV4={{geoIdV4}}&interval=yearly&startyear=2022&endyear=2024
    docs: Aggregated average/median sale prices and transaction counts for an area over an interval (up to two years).
- info:
    name: Mortgage
    type: folder
  items:
  - info:
      name: Property detail with mortgage
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/property/detailmortgage?attomid=145423726
    docs: Property characteristics plus current mortgage and lender information.
  - info:
      name: Property detail with mortgage and owner
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/property/detailmortgageowner?attomid=145423726
    docs: Combined property characteristics, mortgage/lender data, and owner information in a single call.
- info:
    name: School
    type: folder
  items:
  - info:
      name: Property detail with schools
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/property/detailwithschools?attomid=145423726
    docs: Property characteristics plus the school attendance zones and schools serving the property.
  - info:
      name: School search
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/school/search?latitude=39.780062&longitude=-105.043284&radius=5
    docs: Search for schools within a radius of coordinates or within a school attendance area / geoIdV4.
  - info:
      name: School profile
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/school/profile?geoIdV4={{geoIdV4}}
    docs: Profile for an individual school - grades, enrollment, ratings, and location.
  - info:
      name: School district
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/school/district?geoIdV4={{geoIdV4}}
    docs: Information about a school district, including boundaries and enrollment.
- info:
    name: Events
    type: folder
  items:
  - info:
      name: All events detail
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/allevents/detail?id=145423726
    docs: A consolidated view of every event on a property - assessment, AVM, sale, deed, and mortgage - in a single call.
  - info:
      name: All events snapshot
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/propertyapi/v1.0.0/allevents/snapshot?postalcode=80212
    docs: Summary of property events for properties in an area.
- info:
    name: Area & Boundary
    type: folder
  items:
  - info:
      name: Area geography lookup
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/areaapi/v2.0.0/geography/lookup?name=Denver&geographyTypeAbbreviation=PL
    docs: Returns areas (with geoId / geoIdV4 codes) matching an area name and geography type. Modeled from ATTOM's Area API.
  - info:
      name: Area hierarchy lookup
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/areaapi/v2.0.0/hierarchy/lookup?geoIdV4={{geoIdV4}}
    docs: Returns the hierarchy of parent/child areas for a given geoIdV4. Modeled from ATTOM's Area API.
  - info:
      name: Area boundary detail
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/areaapi/v2.0.0/boundary/detail?geoIdV4={{geoIdV4}}&format=geojson
    docs: Returns the boundary geometry for an area in GeoJSON format. Modeled from ATTOM's Area API boundary endpoint.
- info:
    name: Community
    type: folder
  items:
  - info:
      name: Community detail
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/v4/neighborhood/community?geoIdV4={{geoIdV4}}
    docs: Community and neighborhood context for a place or geoIdV4 - climate, crime, demographics, natural hazards, education,
      and commute indicators.
- info:
    name: POI
    type: folder
  items:
  - info:
      name: POI search
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/v4/neighborhood/poi?address=4529 Winona Court, Denver, CO&radius=5
    docs: Points-of-interest search returning nearby businesses and amenities within a radius. Modeled from ATTOM's POI API
      v4.
  - info:
      name: POI category lookup
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/v4/neighborhood/poi/category/lookup
    docs: Returns the supported POI business categories. Modeled from ATTOM's POI API v4.
- info:
    name: Transportation Noise
    type: folder
  items:
  - info:
      name: Transportation noise
      type: http
    http:
      method: GET
      url: https://api.gateway.attomdata.com/transportationnoise?address=4529 Winona Court, Denver, CO
    docs: Modeled transportation-noise scores for a location, estimating noise exposure from road, rail, and air traffic.
      Modeled from ATTOM's transportation-noise resource.
bundled: true