# ATTOM

**Canonical:** https://apis.io/providers/attom-data/  
**Website:** https://www.attomdata.com  
**APIs profiled:** 12

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.

## Kin Score — 38.2 / 100 (thin)

Scored 2026-08-24 under rubric 0.13.0. Trend: flat (-0.4 from 38.6).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 56.1 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 31.6 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 22.9 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | na |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Freemium (free trial) · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: yes (confidence: high).

## APIs (12)

- **ATTOM Area API** — Area geography, geoId lookups, and boundaries (v2/v4).
- **ATTOM Assessment API** — County tax assessment data.
- **ATTOM Community API** — Neighborhood and community context (v4).
- **ATTOM Events API** — Consolidated all-event property history.
- **ATTOM Home Equity API** — Estimated home equity and loan-to-value.
- **ATTOM Mortgage API** — Property records enriched with mortgage and owner data.
- **ATTOM POI API** — Points of interest (v4).
- **ATTOM Property API** — Core property characteristics packages.
- **ATTOM Sales API** — Recorded sale, deed, sales history, and sales trend data.
- **ATTOM School API** — Schools, school districts, and attendance zones.
- **ATTOM Transportation Noise API** — Modeled transportation-noise scores.
- **ATTOM Valuation API** — Automated Valuation Model (AVM) and rental value.

## Agentic access (1)

- **Attom Data Agentic Access** — 37 operations

## Security (2)

- **Attom Data Authentication** — apiKey · 1 scheme
- **Attom Data Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Attom Data Plans Pricing**

## Tags

Property Data, Real-Estate, Location Data, Valuation, AVM, Assessment, Mortgage, Neighborhood

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/attom-data/). Scores are computed from the provider's own public artifacts under a published rubric.