# Domain Availability Checker (`ozito/domain-availability-checker`) Actor

Fast, reliable domain availability checker using RDAP with automatic WHOIS fallback. Check one domain across up to 10 TLDs in a single request. Supports .com, .net, .org, .io, .ai, .dev, .app + custom RDAP endpoints. Structured JSON output with status, source & response time.

- **URL**: https://apify.com/ozito/domain-availability-checker.md
- **Developed by:** [Kal](https://apify.com/ozito) (community)
- **Categories:** Automation, AI, Agents
- **Stats:** 11 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $5.00 / 1,000 domain checks

This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.

Learn more: https://docs.apify.com/actors/running/actors-in-store.md#pay-per-event

## What's an Apify Actor?

Actors are web data automations that power AI and operations. They run on the Apify platform to scrape websites, process data, connect APIs, and automate workflows.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.
Actors are written with capital "A".

## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
The best way to integrate Actors is as follows.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For usage examples, see the [API](#api) section below.

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).

# README

## Domain Availability Checker

Fast, reliable domain availability checker using **RDAP** with automatic **WHOIS** fallback. Check one domain name across up to **10 TLDs** in a single request and get structured JSON results.

### Features

- ⚡ **RDAP-first** — Uses the modern RDAP protocol for fast, structured lookups
- 🔄 **WHOIS fallback** — Automatically retries with WHOIS if RDAP is unavailable or inconclusive
- 🌐 **Multi-TLD** — Check up to 10 TLDs per run (`.com`, `.net`, `.org`, `.io`, `.ai`, `.dev`, `.app`, …)
- 🎯 **Custom RDAP endpoints** — Override or add RDAP endpoints for any TLD
- 🔁 **Built-in retries** — Automatic retry with backoff on rate limits (429) and server errors (503)
- 💰 **Pay-per-event pricing** — First 5 domain checks free, then $0.005 per check

### Input

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `domain` | `string` | ✅ | Base domain name **without** TLD (e.g. `myproject`) |
| `tlds` | `string[]` | ❌ | TLDs to check, max 10. Defaults to `["com", "net", "org"]` |
| `rdapEndpoints` | `object` | ❌ | Custom RDAP endpoint URLs keyed by TLD |

#### Example input

```json
{
    "domain": "myproject",
    "tlds": ["com", "net", "org", "io", "ai"],
    "rdapEndpoints": {
        "xyz": "https://rdap.nic.xyz/domain/"
    }
}
```

### Output

Results are stored in the default **dataset**. Each row contains:

| Field | Type | Description |
|-------|------|-------------|
| `domain` | `string` | Full domain checked (e.g. `myproject.com`) |
| `status` | `string` | `AVAILABLE`, `REGISTERED`, or `UNKNOWN` |
| `source` | `string` | Protocol used (`RDAP` or `WHOIS`) |
| `tld` | `string` | TLD that was checked |
| `response_time` | `number` | Lookup time in seconds |
| `checked_at` | `string` | ISO 8601 timestamp |

#### Example output

```json
[
    {
        "domain": "myproject.com",
        "status": "REGISTERED",
        "source": "RDAP",
        "tld": "com",
        "response_time": 0.32,
        "checked_at": "2026-02-14T19:30:00.000Z"
    },
    {
        "domain": "myproject.io",
        "status": "AVAILABLE",
        "source": "RDAP",
        "tld": "io",
        "response_time": 0.45,
        "checked_at": "2026-02-14T19:30:01.000Z"
    }
]
```

### Pricing

This Actor uses **pay-per-event** pricing:

| Tier | Domain checks | Cost |
|------|--------------|------|
| 🆓 Free | First 5 per run | $0.00 |
| 💳 Paid | 6th check onwards | $0.005 per check |

The Actor automatically stops if the user's spending limit is reached.

### Built-in RDAP endpoints

The following TLDs have pre-configured RDAP endpoints:

| TLD | Endpoint |
|-----|----------|
| `.com` | `rdap.verisign.com` |
| `.net` | `rdap.verisign.com` |
| `.org` | `rdap.publicinterestregistry.net` |
| `.io` | `rdap.nic.io` |
| `.ai` | `rdap.nic.ai` |
| `.dev` | `rdap.dev` |
| `.app` | `rdap.nic.google` |

For other TLDs without a pre-configured endpoint, the Actor will use WHOIS directly. You can add your own endpoints via the `rdapEndpoints` input field.

# Actor input Schema

## `domain` (type: `string`):

Base domain name without TLD (e.g., 'myproject')

## `tlds` (type: `array`):

List of top-level domains to check (max 10)

## `rdapEndpoints` (type: `object`):

Custom RDAP endpoint URLs by TLD (optional). Key is TLD, value is endpoint URL.

## Actor input object example

```json
{
  "domain": "myproject",
  "tlds": [
    "com",
    "net",
    "org"
  ],
  "rdapEndpoints": {
    "xyz": "https://rdap.nic.xyz/domain/"
  }
}
```

# Actor output Schema

## `overview` (type: `string`):

No description

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {
    "domain": "testdomain",
    "tlds": [
        "com",
        "net"
    ],
    "rdapEndpoints": {}
};

// Run the Actor and wait for it to finish
const run = await client.actor("ozito/domain-availability-checker").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = {
    "domain": "testdomain",
    "tlds": [
        "com",
        "net",
    ],
    "rdapEndpoints": {},
}

# Run the Actor and wait for it to finish
run = client.actor("ozito/domain-availability-checker").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
for item in client.dataset(run.default_dataset_id).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{
  "domain": "testdomain",
  "tlds": [
    "com",
    "net"
  ],
  "rdapEndpoints": {}
}' |
apify call ozito/domain-availability-checker --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,ozito/domain-availability-checker"
        }
    }
}

```

The hosted server signs you in with OAuth on first connect, so no API token belongs in this config. Clients without OAuth support can send an `Authorization: Bearer <APIFY_API_TOKEN>` header instead, using a token from API & Integrations in Apify Console (https://console.apify.com/settings/integrations).

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/actors/57H04nd7mgpTpynkQ/builds/PUoGvWpTWigqyRBoh/openapi.json