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Nfon Address API

The address API from Nfon — 1 operation(s) for address.

Nfon Address API is one of 52 APIs that Nfon publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

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

This API exposes 1 operation across 1 path, and defines 4 schemas. It is described by OpenAPI 3.2.0, at version 2026.07.20.

Requests are made against a single base URL, /configuration/v1.

1 operations 1 paths 4 schemas 1 GET

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
2026.07.20
Base URL
https://api.nfon.net/configuration/v1
Authentication
HTTP Bearer
Resource Areas
1

Authentication & Security 1

Nfon Address API declares 1 security scheme for authenticating requests. It accepts HTTP bearer tokens (JWT) (jwt).

Paths & Operations 1

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

Address 1
GET
/address/onkz/{countrycode}/{postalcode}/{city}/{street}
Lookup ONKZ for an address
lookupAddressOnkz → 200502400404

Schemas 4

The contract defines 4 schemas that model the data the API accepts and returns. The most detailed are AddressDetail (6 properties), AddressOnkzResponse (4 properties), AddressStatus (2 properties), AddressCoordinates (2 properties). Each schema is shown below with its type and property counts.

AddressCoordinates
object
AddressCoordinates holds latitude and longitude.
2 properties
AddressDetail
object
AddressDetail holds the resolved address fields.
6 properties
AddressOnkzResponse
object
AddressOnkzResponse represents the response for an address ONKZ lookup.
4 properties 1 required
AddressStatus
object
AddressStatus holds the status of the lookup.
2 properties 2 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

nfon-address-api-openapi.yml Raw ↑

Other APIs Nfon publishes across the network.

NFON Service Portal API (legacy)
Nfon Accounts API
Nfon Authentication API
Nfon Blacklist Profiles API
Nfon Clip Screened Prefixes API
Nfon Contract Types API
Nfon Customer Announcements API
Nfon Customer Conference API
Nfon Customer Contracts API
Nfon Customer Device Types API
Nfon Customer Devices API
Nfon Customer DIDs API
Where this information came from

This is an independent, third-party profile of Nfon Address 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.

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