Domain Discovery Skill

Purpose

Find and validate the official company domain using web search, WHOIS lookups, and common TLD pattern testing.

Operations

1. search_official_domain

Search for the company's official website using web search engines.

Input:

{ "company_name": "string (required)" }

Process:

• Construct search query: "{company_name} official website"

• Execute web search

• Extract top domain results

• Filter out social media, news sites, directories

Search Query Templates:

"{company_name}" official website "{company_name}" homepage site:{company_name}.com OR site:{company_name}.io

2. check_common_tlds

Test common TLD variations for the company name.

TLD Priority Order:

.com → .io → .co → .org → .net → .ai → .dev → .app

Process:

• Normalize company name (lowercase, remove spaces/special chars)

• Test each TLD in priority order

• Verify domain resolves (DNS A record exists)

• Check if homepage contains company name

Example:

Company: "Acme Corporation" Test: acme.com, acmecorp.com, acme.io, acmecorp.io, ...

3. whois_lookup

Query WHOIS database for domains registered to the company.

Command:

whois {domain} | grep -i "Registrant|Organization|Admin"

Fields to Extract:

• Registrant Organization

• Registrant Name

• Admin Email Domain

• Creation Date

• Name Servers

4. validate_domain

Verify the discovered domain belongs to the target company.

Validation Checks:

• Homepage title contains company name

• Meta description mentions company

• WHOIS registrant matches company name

• Social media links point to expected profiles

Output

{ "skill": "domain_discovery", "company": "string", "results": { "primary_domain": "string", "alternative_domains": ["array"], "validation": { "title_match": "boolean", "whois_match": "boolean", "confidence": "High|Medium|Low" }, "whois_data": { "registrant": "string", "created": "date", "nameservers": ["array"] } }, "evidence": [ { "type": "search_result", "query": "string", "result": "string" }, { "type": "whois", "field": "string", "value": "string" } ] }

Detection Patterns

Company Name Normalization

"Acme Corporation" → acme, acmecorp, acme-corp "The Widget Co." → widget, widgetco, thewidget "ABC Technologies Inc" → abc, abctech, abctechnologies

Domain Validation Signals

Signal Weight Description

Title contains company name +30 Strong validation

WHOIS registrant matches +40 Definitive ownership

Meta description mentions +20 Supporting evidence

Social links present +10 Weak validation

Error Handling

• If no domain found via search, prompt for domain hint

• If WHOIS fails, continue with DNS-based validation

• If multiple candidates, return all with confidence scores

• Never assume - always validate ownership signals

Rate Limiting

• Web search: 10 requests/minute

• WHOIS: 5 requests/minute

• DNS resolution: No hard limit

Security Considerations

• Never attempt unauthorized access

• Only use public WHOIS data

• Respect robots.txt on discovered domains

• Log all queries for audit trail