Numeral Tax Calculations API
The Tax Calculations API from Numeral — 2 operation(s) for tax calculations.
Numeral Tax Calculations API is one of 9 APIs that Numeral publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
Tagged areas include Tax Calculations. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.
This API exposes 2 operations across 2 paths, and defines 4 schemas. It is described by OpenAPI 3.0.1, at version 2026-03-01.
Requests are made against a single base URL, https://api.numeralhq.com.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
Numeral Tax Calculations API declares
1 security scheme
for authenticating requests.
It accepts HTTP bearer tokens (bearerAuth).
By default, every request must be authenticated.
bearerAuth— Provide your Numeral API key as a Bearer token in the Authorization header.
Paths & Operations 2
Across 2 paths, the API surfaces 2 operations — 2 POST. Each is listed below with its method, path, parameters, and response codes.
Schemas 4
The contract defines 4 schemas that model the data the API accepts and returns. The most detailed are CalculationResponse (11 properties), Address (6 properties), CalculationRequest (4 properties), LineItem (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 Numeral 8
Other APIs Numeral publishes across the network.