Pinwheel Tax Forms API
The Tax Forms API from Pinwheel — 2 operation(s) for tax forms.
Pinwheel Tax Forms API is one of 14 APIs that Pinwheel publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
This API exposes 1 JSON Schema definition.
Tagged areas include Tax Forms. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and 1 JSON Schema.
This API exposes 2 operations across 2 paths, and defines 11 schemas. It is described by OpenAPI 3.2.0, at version v2025-07-08.
Requests are made against 3 base URLs: https://api.getpinwheel.com/v1, https://sandbox.getpinwheel.com/v1, https://development.getpinwheel.com/v1.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 2
Pinwheel Tax Forms API declares
2 security schemes
for authenticating requests.
An API key is passed in the header as X-API-SECRET (apiSecret).
It accepts HTTP bearer tokens (bearerAuth).
By default, every request must be authenticated.
apiSecret— API SecretbearerAuth— Bearer token
Paths & Operations 2
Across 2 paths, the API surfaces 2 operations — 2 GET. Each is listed below with its method, path, parameters, and response codes.
Schemas 11
The contract defines 11 schemas that model the data the API accepts and returns. The most detailed are TaxFormW2 (22 properties), TaxFormObjResponse_v2022_06_22 (8 properties), W2Box15To20 (7 properties), AddressGetResponseItem (7 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 Pinwheel 12
Other APIs Pinwheel publishes across the network.
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