# ATTOM

**Canonical:** https://apis.io/providers/attomdata/  
**Website:** https://api.developer.attomdata.com/  
**APIs profiled:** 18

## Kin Score — 50.1 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 50.1).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 70.8 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 59.5 |
| Commercial Clarity | 52.6 |
| Access Clarity | 52.6 |

Regulatory layer — **Insurance**: 25.8 (matched via tags).

## Agent readiness — 34.7 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | yes |
| 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 |

## Access

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

## APIs (18)

- **ATTOM All Events API** — Combined assessment, AVM, and sales-transaction events.
- **ATTOM Assessment API** — Assessed value, tax liability, and assessment history.
- **ATTOM AVM API** — Automated Valuation Model — current AVM, AVM history, and rental AVM.
- **ATTOM Boundary API** — GeoJSON boundary polygons by geography identifier.
- **ATTOM Building Permits API** — Building permit records associated with a property.
- **ATTOM Community API** — Neighborhood community profile (demographics, crime, weather, commute).
- **ATTOM Hierarchy API** — Geographic hierarchy lookup from coordinates.
- **ATTOM Home Equity API** — Estimated home equity calculations.
- **ATTOM Location API** — Resolve a location by geoIdV4.
- **ATTOM Lookup API** — Lookup of state, county, CBSA, and geoID metadata.
- **ATTOM Parcel Tiles API** — Vector parcel boundary tiles.
- **ATTOM POI Categories API** — Lookup of POI categories, lines of business, and industries.
- **ATTOM POI Search API** — Search points of interest by point or address.
- **ATTOM Pre-Foreclosure API** — Pre-foreclosure status and notice records.
- **ATTOM Property API** — Property characteristics, ownership, mortgage, and address resolution.
- **ATTOM Sale API** — Sales transactions, sales history, and comparable sales.
- **ATTOM Sales Trends API** — Aggregated sales trends for a geography.
- **ATTOM School API** — School assignments and attendance-zone associations.

## Agentic access (1)

- **Attomdata Agentic Access** — 47 operations

## Security (2)

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

## Plans (1)

- **Attomdata Plans Pricing**

## Tags

Real-Estate, Property Data, Property Intelligence, Mortgage, Assessment, AVM, Foreclosure, Transaction, Owner Data, Building Permits, Geospatial, Boundaries, Demographics, Neighborhood, POI, Insurance, Mortgage Technology, PropTech

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