ATTOM Assessment API
Assessed value, tax liability, and assessment history.
ATTOM Assessment API is one of 18 APIs that ATTOM publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
This API exposes 6 JSON Schema definitions.
Tagged areas include Assessment. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, a JSON-LD context, and 6 JSON Schemas.
This API exposes 3 operations across 3 paths, and defines 6 schemas. It is described by OpenAPI 3.2.0, at version v1.0.0.
Requests are made against a single base URL, https://api.gateway.attomdata.com.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
ATTOM Assessment API declares
1 security scheme
for authenticating requests.
An API key is passed in the header as apikey (ApiKeyAuth).
By default, every request must be authenticated.
ApiKeyAuth— ATTOM-issued API key. Pass on every request via the apikey header.
Paths & Operations 3
Across 3 paths, the API surfaces 3 operations — 3 GET. Each is listed below with its method, path, parameters, and response codes.
Assessed value, tax liability, and assessment history.
Schemas 6
The contract defines 6 schemas that model the data the API accepts and returns. The most detailed are Address (10 properties), Status (6 properties), Assessment (5 properties), Owner (4 properties). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
More from ATTOM 12
Other APIs ATTOM publishes across the network.
This is an independent, third-party profile of ATTOM Assessment API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
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