How AI is applied across API Evangelist and APIs.io. Read my AI disclosure →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC

Fonoa Tax API

The Tax API from Fonoa — 1 operation(s) for tax.

Fonoa Tax API is one of 5 APIs that Fonoa publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Tax. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

This API exposes 1 operation across 1 path, and defines 3 schemas. It is described by OpenAPI 3.0.0, at version 1.0.0.

Requests are made against 3 base URLs: https://api-demo.fonoa.com, https://sandbox.fonoa.com/, https://api.fonoa.com.

1 operations 1 paths 3 schemas 1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.0.0
API Version
1.0.0
Base URL
https://api.fonoa.com/validate
Authentication
API Key
Resource Areas
1

Authentication & Security 1

Fonoa Tax API declares 1 security scheme for authenticating requests. An API key is passed in the header as Ocp-Apim-Subscription-Key (ApiKeyAuth). By default, every request must be authenticated.

Paths & Operations 1

Across 1 path, the API surfaces 1 operation — 1 POST. Each is listed below with its method, path, parameters, and response codes.

Tax 1
POST
/tax/v2/calculations
Request a calculation
Requestataxrate body → 200400500

Schemas 3

The contract defines 3 schemas that model the data the API accepts and returns. The most detailed are TaxDetermineResponse (4 properties), TaxDetermineRequest (4 properties), TaxDetermineResponseError (1 property). Each schema is shown below with its type and property counts.

TaxDetermineRequest
object
4 properties 3 required
TaxDetermineResponseError
object
1 property
TaxDetermineResponse
object
4 properties 4 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

fonoa-tax-api-openapi.yml Raw ↑

Other APIs Fonoa publishes across the network.

Fonoa Webhooks API
Fonoa Lookup V2 API
Fonoa Onboarding API
Fonoa Transactions API
Where this information came from

This is an independent, third-party profile of Fonoa Tax 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.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.