Domain Checker Tool: Instant Domain Availability Lookup by Extension

Check whether a specific domain name is registered or free to buy. Input a full domain like example.com or mybrand.io and get a clean availability result back. Leave off the extension and it defaults to .com. This actor runs on a Pay Per Result model — you only pay for the domains you actually check.

Pricing

This actor uses Pay Per Result pricing. There are no upfront charges. Each successful domain lookup counts as one result. Run 5 domains and pay only for those 5, not a flat fee. Costs stay predictable whether you run a single check or a full batch.

Use cases

• Brand name validation: confirm your chosen domain is free before you build around it.
• Quick .com checks: test a list of brand ideas against .com without extra configuration.
• Extension-specific lookup: need to know if mybrand.io or mybrand.dev is taken? Input the full domain and get an exact answer.
• Startup naming workflow: run a shortlist of potential names and filter results by available: true.
• Pre-purchase auditing: verify domain status before placing registration orders.

How is this different from the Bulk Domain Checker?

The Bulk Domain Checker scans a base name across all 80+ supported TLDs and returns one record per extension. This actor does the opposite: give it a full domain and it returns exactly one result. No extra TLDs, no noise.

Input

Parameter	Type	Default	Description
domains	array	—	Full domain names to check (e.g., example.com, brand.io). If you omit the TLD (e.g., example), the actor checks example.com by default.
timeoutSecs	integer	600	Actor timeout in seconds.
proxyConfiguration	object	Datacenter (Anywhere)	Optional proxy settings.

Default TLD: If you enter a domain without an extension (e.g., mybrand), the actor automatically checks mybrand.com.

Example input

{
    "domains": [
        "kawsarlog.com",
        "kawsarlog.io",
        "mybrand"
    ],
    "proxyConfiguration": {
        "useApifyProxy": true
    }
}

mybrand above is treated as mybrand.com.

What data does this actor return?

One dataset record per domain input:

{
  "domain": "kawsarlog.com",
  "isRegistered": true,
  "available": false,
  "label": "kawsarlog",
  "tld": "com"
}

Field	Type	Description
domain	string	The exact domain that was checked.
isRegistered	boolean	True if the domain is already taken.
available	boolean	True if the domain is free to register. Always the inverse of isRegistered.
label	string	The base name without the extension.
tld	string	The extension that was checked.

How it works

1. The actor reads your domain list and removes duplicates.
2. For each domain, it extracts the base name and the TLD. If no TLD is found, it defaults to .com.
3. It queries the Instant Domain Search API for only that specific TLD — no unnecessary requests.
4. The result is filtered to the exact TLD, structured, and pushed to the dataset.
5. If a domain fails to resolve, it records a generic error without stopping the rest of the run.

FAQ

What happens if I enter just mybrand with no extension? The actor treats it as mybrand.com. If you need a different extension, include it explicitly (e.g., mybrand.io).

Can it check multiple different extensions at once? Yes. Add them as separate entries: ["mybrand.com", "mybrand.io", "mybrand.net"]. Each gets its own record.

What happens when a domain check fails? The actor writes a record with isRegistered: null, available: null, and an error field. The run continues for all remaining domains.

Integrations

Connect this actor with other tools using Apify integrations. Push results to Google Sheets, send Slack alerts when a domain becomes available, or automate registration workflows in Make or Zapier. Use webhooks to fire actions when a run completes.