# ATTOM, free trial, GET /propertyapi/v1.0.0/assessment/detail: Property records API

> Use the /assessment resource to get assessments, assessed values and taxes on a property or list of properties.

ATTOM's Free trial plan for the Property records API costs $0.00 per 1,000 addresses. We check each provider's docs for 13 fields. ATTOM's docs list 6: Assessed value, Tax amount, Year built, Living area, Rooms, Lot size.
ATTOM limits how many calls you get but gives no number.
We haven't run ATTOM through our Property records API benchmark yet.
This plan is free. We rank 103 plans for Property records APIs by price. Half the plans cost $150.00 or less per 1,000 addresses.
[Straply's $99 monthly plan](https://datacircle.dev/property-records-apis/straply/99-monthly-straply-founding-rate-get-v1-properties-id/llms.txt) is the cheapest paid plan per 1,000 addresses: $0.99. [PropertyRadar's $1,188 yearly plan](https://datacircle.dev/property-records-apis/propertyradar/1188-yearly-solo-get-v1-properties-radarid-persons/llms.txt) costs the least for 10,000 addresses a month: $99.00.

- This page: https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-assessment-detail
- Get it: https://www.attomdata.com/solutions/property-data-api/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=property-records-api-pricing
- Request: `GET https://api.gateway.attomdata.com/propertyapi/v1.0.0/assessment/detail`
- API key: with the plan, on https://www.attomdata.com/solutions/property-data-api/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=property-records-api-pricing
- Its API docs: https://api.developer.attomdata.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=property-records-api-pricing
- Sold by: ATTOM (https://www.attomdata.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=property-records-api-pricing)
- Checked: 2026-11-12

## In the answer

- Completeness: 46%
- Assessed value: ✓
- Tax amount: ✓
- Year built: ✓
- Living area: ✓
- Rooms: ✓
- Lot size: ✓

## Price

- $ per 1,000 addresses: $0.00
- Per: call
- Billing: free

## Charges

- Also pays for: from the same budget: Property Detail · Property Basic Profile · Property Expanded Profile · Property Detail Owner · Property Detail Mortgage · Property Detail Mortgage Owner · Assessment History Detail · Sale Detail · Sales History Detail · Sales History Basic History · Sales History Expanded History · /allevents/detail · Neighborhood POI

## Not found

- $ per 1,000 calls that find nothing: $0.00

## In their words

- Their pitch: Use the /assessment resource to get assessments, assessed values and taxes on a property or list of properties.

## Data

- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $0

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: one of attomId, id, fips and apn, address, or address1 and address2. Optional: radius, longitude, latitude, postalcode, calendardate, addeddate, propertytype, propertyindicator, apprimprvalue, apprlandvalue, apprttlvalue, assdimprvalue, assdlandvalue, assdttlvalue, mktimprvalue, mktlandvalue, mktttlvalue, taxamt, universalsize, yearbuilt, lotsize1, lotsize2, beds, bathstotal, absenteeowner, geoid, geoidv4
- Method: GET
- Path: /propertyapi/v1.0.0/assessment/detail

## About the plan

- Plan: Free trial
- Who can get it: anyone who signs up for a free trial API key

## The 122 fields the plan's answer can hold

legacy property ID, FIPS code, APN, original APN, ATTOM ID, lot depth, lot frontage, lot number, lot size in acres, lot size in square feet, lot type, pool, pool type, block number, location type, county, county use code, municipality code, municipality name, survey range, survey section, survey township, subdivision name, subdivision tract number, tax code area, building name, country, state, address line 1, address line 2, city, address match code, address, ZIP code, ZIP+4, carrier route, location accuracy, elevation, latitude, longitude, distance, GeoID, GeoID V4, absentee owner, property class, property subtype, property type, year built, land use, property indicator, legal description, cooling type, energy type, heating fuel, heating type, sewer type, water type, building square feet, gross square feet, adjusted gross square feet, ground floor square feet, living square feet, size indicator, universal square feet, bathroom fixtures, full bathrooms, partial bathrooms, bathrooms, bedrooms, total rooms, basement size, basement type, flooring, fireplaces, fireplace, fireplace type, building condition, construction type, foundation type, frame type, roof cover, roof shape, wall type, garage type, garage size, parking type, parking spaces, architectural style, buildings, building style, building type, stories, mobile home, building quality, story type, units, effective year built, view, view code, assessed improvement value per square foot, assessed improvement value, assessed land value per square foot, assessed land value, assessed total value per square foot, assessed total value, calculated improvement value indicator, calculated improvement value per square foot, calculated improvement value, calculated land value indicator, calculated land value per square foot, calculated land value, calculated total value indicator, calculated total value, calculated value per square foot, market improvement value, market land value, market total value, tax amount, tax per square foot, tax year, record last modified, source data publish date

## ATTOM's plans (3)

- [ATTOM, free trial, GET /propertyapi/v1.0.0/assessment/detail](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-assessment-detail/llms.txt): $0.00 per 1,000, 46% complete
- [ATTOM, $500 monthly, Basic Property, GET /propertyapi/v1.0.0/assessment/detail](https://datacircle.dev/property-records-apis/attom/500-monthly-basic-property-get-propertyapi-v1-0-0-assessment-detail/llms.txt): 46% complete
- [ATTOM, contact us, Premium Property, GET /propertyapi/v1.0.0/assessment/detail](https://datacircle.dev/property-records-apis/attom/contact-us-premium-property-get-propertyapi-v1-0-0-assessment-detail/llms.txt): 46% complete

## ATTOM's calls for this API (13)

- `GET /propertyapi/v1.0.0/allevents/detail`: [ATTOM, free trial, GET /propertyapi/v1.0.0/allevents/detail](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-allevents-detail/llms.txt)
- `GET /propertyapi/v1.0.0/assessment/detail`: [ATTOM, free trial, GET /propertyapi/v1.0.0/assessment/detail](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-assessment-detail/llms.txt)
- `GET /propertyapi/v1.0.0/assessmenthistory/detail`: [ATTOM, free trial, GET /propertyapi/v1.0.0/assessmenthistory/detail](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-assessmenthistory-detail/llms.txt)
- `GET /propertyapi/v1.0.0/property/basicprofile`: [ATTOM, free trial, GET /propertyapi/v1.0.0/property/basicprofile](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-property-basicprofile/llms.txt)
- `GET /propertyapi/v1.0.0/property/detail`: [ATTOM, free trial, GET /propertyapi/v1.0.0/property/detail](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-property-detail/llms.txt)
- `GET /propertyapi/v1.0.0/property/detailmortgage`: [ATTOM, free trial, GET /propertyapi/v1.0.0/property/detailmortgage](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-property-detailmortgage/llms.txt)
- `GET /propertyapi/v1.0.0/property/detailmortgageowner`: [ATTOM, free trial, GET /propertyapi/v1.0.0/property/detailmortgageowner](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-property-detailmortgageowner/llms.txt)
- `GET /propertyapi/v1.0.0/property/detailowner`: [ATTOM, free trial, GET /propertyapi/v1.0.0/property/detailowner](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-property-detailowner/llms.txt)
- `GET /propertyapi/v1.0.0/property/expandedprofile`: [ATTOM, free trial, GET /propertyapi/v1.0.0/property/expandedprofile](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-property-expandedprofile/llms.txt)
- `GET /propertyapi/v1.0.0/sale/detail`: [ATTOM, free trial, GET /propertyapi/v1.0.0/sale/detail](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-sale-detail/llms.txt)
- `GET /propertyapi/v1.0.0/saleshistory/basichistory`: [ATTOM, free trial, GET /propertyapi/v1.0.0/saleshistory/basichistory](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-saleshistory-basichistory/llms.txt)
- `GET /propertyapi/v1.0.0/saleshistory/detail`: [ATTOM, free trial, GET /propertyapi/v1.0.0/saleshistory/detail](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-saleshistory-detail/llms.txt)
- `GET /propertyapi/v1.0.0/saleshistory/expandedhistory`: [ATTOM, free trial, GET /propertyapi/v1.0.0/saleshistory/expandedhistory](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-saleshistory-expandedhistory/llms.txt)

## ATTOM's APIs (2)

- [ATTOM Local business search API pricing, 3 plans](https://datacircle.dev/local-business-search-apis/attom/free/llms.txt)
- [ATTOM Property records API pricing, 3 plans, GET /propertyapi/v1.0.0/assessment/detail](https://datacircle.dev/property-records-apis/attom/free-trial-get-propertyapi-v1-0-0-assessment-detail/llms.txt)

## ATTOM: Property records API alternatives

[ATTOM alternatives: other Property records API providers by price](https://datacircle.dev/attom-alternatives.txt)

We list other providers' plans closest to this plan in price per 1,000 addresses.

- [Realie, free, GET /public/property/address/](https://datacircle.dev/property-records-apis/realie/free-get-public-property-address/llms.txt): $0.00 per 1,000, 92% complete, stored
- [RentCast, free, Developer, GET /v1/properties/{id}](https://datacircle.dev/property-records-apis/rentcast/free-developer-get-v1-properties-id/llms.txt): $0.00 per 1,000, 77% complete, 1 week
- [Kukun, free](https://datacircle.dev/property-records-apis/kukun/free/llms.txt): $0.00 per 1,000, 69% complete, 1 day
- [Homesage, free, 30-day trial, GET /api/properties/info/](https://datacircle.dev/property-records-apis/homesage/free-30-day-trial-get-api-properties-info/llms.txt): $0.00 per 1,000, 46% complete, stored

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-12.

- https://api.developer.attomdata.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=property-records-api-pricing
- https://api.developer.attomdata.com/home?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=property-records-api-pricing
- https://www.attomdata.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=property-records-api-pricing
- https://www.attomdata.com/solutions/property-data-api/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=property-records-api-pricing
- https://www.attomdata.com/terms-of-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=property-records-api-pricing