GitHub Skill

domain-check

Batch domain availability checker via whois.com with Playwright browser automation. Handles anti-bot/CAPTCHA challenges by bringing browser to foreground for manual verification. Supports any TLD. Use when (1) checking if domains are available for registration, (2) batch-checking multiple domain candidates, (3) verifying domain availability before purchase, or (4) exporting domain check results to JSON.

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Installation

Follow the repository instructions for this skill and your agent. Review the files and dependencies before adding it to your workflow.

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Skill instructions

Domain Availability Check

Batch-check domain availability via whois.com with anti-bot/CAPTCHA assist.

Quick Start

# Setup (first time)
cd $SKILL_DIR && npm run setup

# Check domains from command line
node run.js scripts/domain-check.js --domains "example.ai,myapp.io" --nslookup

# Check domains from file
node run.js scripts/domain-check.js --file domains.txt --out results.json --nslookup

File format: one domain per line, # for comments. See examples/domains.txt.

Options

Option	Description	Default
`--domains`	Comma-separated domain list	-
`--file`	Path to domain list file	-
`--out`	Output JSON file path	stdout
`--nslookup`	Corroborate with DNS lookup	`false`
`--user-data-dir`	Persistent browser profile (reduces CAPTCHA)	-
`--challenge-wait`	Max CAPTCHA wait time (ms)	`120000`
`--delay`	Delay between checks (ms)	`900`

Behavior

Opens visible browser (headless=false) for CAPTCHA handling.
On Security Check / CAPTCHA: brings browser to front, waits for manual completion.
Classification rules:
- Looks like this domain has not been registered yet -> available
- Domain Information / Registrar Information -> registered
- WHOIS patterns like No match for, Domain not found -> available
--nslookup: NXDOMAIN suggests unregistered DNS (corroboration only).

Output

JSON array with domain, status (available|registered|unknown|error), nslookup.

Tips

Use --user-data-dir ./profile to reduce repeated CAPTCHA challenges.
Run sequentially to minimize anti-bot triggers.

Examples

Read the usage examples in the source repository.

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Source history

Indexed on: 2026-03-11
Index updated: 2026-03-11
Branch: main

Index and sync dates describe this directory. View the source repository for code history.

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