# Domain Checker

> Bulk domain availability and pricing for .com, .ai, .io, .dev, .xyz, and any TLD. Designed for AI agents: results are available as plain Markdown via simple URL paths, plus a JSON API.

Hosted at https://domain-checker.asiones.com. Backed by Cloudflare Registrar for TLDs with first-party pricing, and RDAP (via the .ai registry and rdap.org IANA bootstrap) as a fallback for everything else (availability only).

## Agent quick start

Make a GET request with one or more names as path segments. The response is a Markdown table — no HTML, no JavaScript needed.

    GET https://domain-checker.asiones.com/{name1}/{name2}/...

Defaults to `.com` and `.ai`. Override TLDs with the `ext` query parameter (comma-separated):

    GET https://domain-checker.asiones.com/openai/anthropic?ext=io,dev,xyz

## JSON API

    POST https://domain-checker.asiones.com/api/check
    Content-Type: application/json

    {
      "queries": ["openai", "anthropic"],
      "extensions": [".com", ".ai", ".io"]
    }

Response shape:

    {
      "results": [
        { "name": "openai.com", "registrable": false, "pricing": { ... } },
        { "name": "openai.ai",  "registrable": false, "reason": "RDAP: registered" }
      ]
    }

## Limits

- Up to 100 name queries per request
- Up to 20 TLDs per request

## Examples

- https://domain-checker.asiones.com/openai
- https://domain-checker.asiones.com/openai/anthropic
- https://domain-checker.asiones.com/mycompany?ext=com,io,ai,dev,xyz