ATTOM

ATTOM Property API

Core property characteristics packages.

GitHub OpenAPI

Documentation

📖
Documentation
https://api.developer.attomdata.com/docs
📖
APIReference
https://api.developer.attomdata.com/docs
📖
Documentation
https://cloud-help.attomdata.com/article/612-attom-api-v4
📖
Documentation
https://cloud-help.attomdata.com/article/641-upgrading-to-poi-endpoint-v4

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/attom-data/refs/heads/main/openapi/attom-data-property-api-openapi.yml

Other Resources

🔗
PostmanCollection
https://raw.githubusercontent.com/api-evangelist/attom-data/refs/heads/main/collections/attom-data.postman_collection.json
🔗
OpenCollection
https://raw.githubusercontent.com/api-evangelist/attom-data/refs/heads/main/collections/attom-data.opencollection.json

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OpenAPI Specification

attom-data-property-api-openapi.yml Raw ↑ 
openapi: 3.0.3
info:
  title: ATTOM Area Property API
  description: 'The ATTOM API (delivered as ATTOM Cloud) provides REST access to ATTOM Data Solutions'' national warehouse of property, real estate, and location data covering 158+ million U.S. properties. Resources are queried by address, APN + FIPS, ATTOM ID, radius around coordinates, or geoIdV4, and cover property characteristics, tax assessments, automated valuations (AVM), sales and deed history, mortgage records, area and boundary geographies, schools, community/neighborhood data, points of interest, transportation noise, consolidated all-event history, and home equity.

    Every request requires an API key passed in the `apikey` header. The URI pattern for the classic Property API is `{base}/propertyapi/v1.0.0/{resource}/{package}?{query}`; version 4 (v4) endpoints drop the component name and use a simplified `{base}/v4/{resource}` form. Area geography endpoints live under `areaapi/v2.0.0`.

    Endpoints under `propertyapi/v1.0.0` (property, assessment, avm, sale, saleshistory, salestrend, school, allevents, valuation) are grounded in ATTOM''s published endpoint reference. The v4 community, POI, area/boundary, and transportation-noise operations are modeled from ATTOM''s documented resource groups; confirm exact query parameters against the live docs.'
  version: 1.0.0
  contact:
    name: ATTOM Data Solutions
    url: https://www.attomdata.com
  x-logo:
    url: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
servers:
- url: https://api.gateway.attomdata.com
  description: ATTOM API gateway (production)
security:
- apiKeyAuth: []
tags:
- name: Property
  description: Core property characteristics packages.
paths:
  /propertyapi/v1.0.0/property/id:
    get:
      operationId: getPropertyId
      tags:
      - Property
      summary: Property ID lookup
      description: Returns the ATTOM-assigned property ID and minimal identity fields for matching properties.
      parameters:
      - $ref: '#/components/parameters/Address'
      - $ref: '#/components/parameters/Address1'
      - $ref: '#/components/parameters/Address2'
      - $ref: '#/components/parameters/PageSize'
      responses:
        '200':
          $ref: '#/components/responses/PropertyResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /propertyapi/v1.0.0/property/basicprofile:
    get:
      operationId: getPropertyBasicProfile
      tags:
      - Property
      summary: Property basic profile
      description: Essential property profile - address, location, lot, and building basics - for a specific address or APN/FIPS.
      parameters:
      - $ref: '#/components/parameters/Address'
      - $ref: '#/components/parameters/Address1'
      - $ref: '#/components/parameters/Address2'
      - $ref: '#/components/parameters/Apn'
      - $ref: '#/components/parameters/Fips'
      - $ref: '#/components/parameters/AttomId'
      responses:
        '200':
          $ref: '#/components/responses/PropertyResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /propertyapi/v1.0.0/property/detail:
    get:
      operationId: getPropertyDetail
      tags:
      - Property
      summary: Property detail
      description: Comprehensive property characteristics for a property or list of properties.
      parameters:
      - $ref: '#/components/parameters/Address'
      - $ref: '#/components/parameters/Address1'
      - $ref: '#/components/parameters/Address2'
      - $ref: '#/components/parameters/AttomId'
      responses:
        '200':
          $ref: '#/components/responses/PropertyResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /propertyapi/v1.0.0/property/expandedprofile:
    get:
      operationId: getPropertyExpandedProfile
      tags:
      - Property
      summary: Property expanded profile
      description: Extended property profile combining characteristics, most-recent sale, assessment, and AVM in one call.
      parameters:
      - $ref: '#/components/parameters/Address'
      - $ref: '#/components/parameters/Address1'
      - $ref: '#/components/parameters/Address2'
      responses:
        '200':
          $ref: '#/components/responses/PropertyResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /propertyapi/v1.0.0/property/address:
    get:
      operationId: getPropertyAddress
      tags:
      - Property
      summary: Property address radius search
      description: Radius search returning all properties within a given radius (miles) of coordinates or a postal code.
      parameters:
      - $ref: '#/components/parameters/Latitude'
      - $ref: '#/components/parameters/Longitude'
      - $ref: '#/components/parameters/Radius'
      - $ref: '#/components/parameters/PostalCode'
      - $ref: '#/components/parameters/Page'
      - $ref: '#/components/parameters/PageSize'
      responses:
        '200':
          $ref: '#/components/responses/PropertyResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /propertyapi/v1.0.0/property/snapshot:
    get:
      operationId: getPropertySnapshot
      tags:
      - Property
      summary: Property snapshot
      description: Returns properties in an area matching characteristic filters such as beds, baths, size, value, and lot size.
      parameters:
      - $ref: '#/components/parameters/PostalCode'
      - $ref: '#/components/parameters/Latitude'
      - $ref: '#/components/parameters/Longitude'
      - $ref: '#/components/parameters/Radius'
      - $ref: '#/components/parameters/PageSize'
      responses:
        '200':
          $ref: '#/components/responses/PropertyResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /propertyapi/v1.0.0/property/detailowner:
    get:
      operationId: getPropertyDetailOwner
      tags:
      - Property
      summary: Property detail with owner
      description: Property characteristics plus current owner names and mailing information.
      parameters:
      - $ref: '#/components/parameters/Address1'
      - $ref: '#/components/parameters/Address2'
      - $ref: '#/components/parameters/AttomId'
      responses:
        '200':
          $ref: '#/components/responses/PropertyResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /propertyapi/v1.0.0/property/buildingpermits:
    get:
      operationId: getPropertyBuildingPermits
      tags:
      - Property
      summary: Property building permits
      description: Building permit records for a property.
      parameters:
      - $ref: '#/components/parameters/Address1'
      - $ref: '#/components/parameters/Address2'
      - $ref: '#/components/parameters/AttomId'
      responses:
        '200':
          $ref: '#/components/responses/PropertyResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  parameters:
    Radius:
      name: radius
      in: query
      schema:
        type: number
        format: double
        default: 5
        maximum: 20
      description: Search radius in miles (default 5, maximum 20).
    Address2:
      name: address2
      in: query
      schema:
        type: string
      description: Second line of the address (city, state).
    Fips:
      name: fips
      in: query
      schema:
        type: string
      description: County FIPS code; use with apn.
    Longitude:
      name: longitude
      in: query
      schema:
        type: number
        format: double
      description: Longitude of the search center.
    AttomId:
      name: attomid
      in: query
      schema:
        type: string
      description: ATTOM-assigned property identifier.
    PageSize:
      name: pagesize
      in: query
      schema:
        type: integer
        default: 10
        maximum: 100
      description: Number of records per page (maximum 100).
    Page:
      name: page
      in: query
      schema:
        type: integer
        default: 1
      description: Page number for paginated results.
    Address1:
      name: address1
      in: query
      schema:
        type: string
      description: First line of the street address (house number and street).
    PostalCode:
      name: postalcode
      in: query
      schema:
        type: string
      description: 5-digit ZIP / postal code to scope the search.
    Apn:
      name: apn
      in: query
      schema:
        type: string
      description: Assessor parcel number; use with fips.
    Address:
      name: address
      in: query
      schema:
        type: string
      description: Full one-line street address (e.g. "4529 Winona Court, Denver, CO").
    Latitude:
      name: latitude
      in: query
      schema:
        type: number
        format: double
      description: Latitude of the search center.
  responses:
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/StatusEnvelope'
    BadRequest:
      description: The request was missing required parameters or was malformed.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/StatusEnvelope'
    PropertyResponse:
      description: A status envelope plus an array of property records.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/PropertyResponse'
  schemas:
    Status:
      type: object
      description: The status block returned on every ATTOM response.
      properties:
        version:
          type: string
        code:
          type: integer
        msg:
          type: string
        total:
          type: integer
        page:
          type: integer
        pagesize:
          type: integer
    PropertyResponse:
      type: object
      properties:
        status:
          $ref: '#/components/schemas/Status'
        property:
          type: array
          items:
            $ref: '#/components/schemas/Property'
    StatusEnvelope:
      type: object
      properties:
        status:
          $ref: '#/components/schemas/Status'
    Property:
      type: object
      description: A property record. ATTOM returns a rich, package-dependent object; key groups are summarized here.
      properties:
        identifier:
          type: object
          properties:
            obPropId:
              type: string
            attomId:
              type: integer
            fips:
              type: string
            apn:
              type: string
        address:
          type: object
          properties:
            line1:
              type: string
            line2:
              type: string
            locality:
              type: string
            countrySubd:
              type: string
            postal1:
              type: string
        location:
          type: object
          properties:
            latitude:
              type: string
            longitude:
              type: string
            geoIdV4:
              type: object
              additionalProperties:
                type: string
        summary:
          type: object
          additionalProperties: true
        building:
          type: object
          additionalProperties: true
        assessment:
          type: object
          additionalProperties: true
        avm:
          type: object
          additionalProperties: true
        sale:
          type: object
          additionalProperties: true
        mortgage:
          type: object
          additionalProperties: true
        owner:
          type: object
          additionalProperties: true
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: header
      name: apikey
      description: 'Your unique ATTOM API key, assigned by ATTOM and passed in the `apikey` request header. Also send `Accept: application/json` (or application/xml).'