One Word Domains API

The Unique Domains API is built for teams that want search, one-domain lookup, filter metadata, TLD and sector catalogs, plus webhook-ready workspace automation.

Quick start

Base URL

https://api.unique.domains/v1

Authorization

Authorization: Apikey YOUR_API_KEY

Request for access

GuideBasics

Authentication

Use the Authorization header with the Apikey scheme on every private route. Public metadata routes can be called without a key, but customer data and workflow routes should always use stable API keys.

Overview

Authenticate every private request with an API key.

Start here for API keys, authentication, and plan-level request limits.

Headers

Field	Type	Req.	Description
Authorization	header	Yes	API key header using the exact `Apikey` scheme.
Content-Type	header	No	Use `application/json` when sending a request body.

Request example

This endpoint is read-only and does not require a JSON body.

Auth error example

Response fields

Field	Type	Req.	Description
error.code	string	Yes	Machine-readable auth failure code.
error.message	string	Yes	Human-readable reason for the rejection.

Response example

{
    "error": {
        "code": "UNAUTHORIZED",
        "message": "Missing or invalid API key."
    }
}

Usage examples

Copy, paste, and call this endpoint in the language you already use.

curl -X POST "https://api.unique.domains/v1/searches/domains" \
  -H "Authorization: Apikey YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"prompt":"brandable ai domains"}'

Request access

Need access to the One Word Domains API?

Send a WhatsApp message to request access, discuss your use case, and get the right setup for your team.

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