
Domain Research
- 342 installs
- 614 repo stars
- Updated August 5, 2026
- openclaudia/openclaudia-skills
domain-research is an agent skill that performs free WHOIS/RDAP domain lookups and marketplace listing checks so developers can evaluate registrar data and acquisition options before registering a project domain.
About
domain-research is an OpenClaudia agent skill for WHOIS/RDAP domain intelligence and marketplace availability research using curl against the DomainDetails API with no authentication required. The skill returns registrar, created and expiry dates, nameservers, DNSSEC status, and contact fields from RDAP lookup endpoints, then queries marketplace search APIs that aggregate listings from Sedo, Afternic, Atom, Dynadot, Namecheap, NameSilo, and Unstoppable Domains. Developers reach for domain-research when evaluating a domain for a SaaS launch, verifying who owns an existing hostname, or comparing buy-now prices before DNS and branding work begins. The free API supports high-volume scripted checks during naming workshops or bulk availability reviews. Typical output is structured JSON piped through jq for registrar metadata and parallel marketplace rows suitable for acquisition spreadsheets.
- Surfaces industry players and competitive dynamics
- Captures domain terminology and buyer pain points
- Identifies trends shaping positioning opportunities
- Feeds downstream ICP, SEO, and content planning
Domain Research by the numbers
- 342 all-time installs (skills.sh)
- +14 installs in the week ending Aug 4, 2026 (Skillselion tracking)
- Ranked #837 of 3,282 Productivity & Planning skills by installs in the Skillselion catalog
- Data as of Aug 5, 2026 (Skillselion catalog sync)
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| Installs | 342 |
|---|---|
| repo stars | ★ 614 |
| Last updated | August 5, 2026 |
| Repository | openclaudia/openclaudia-skills ↗ |
How do you check WHOIS and domain marketplace listings?
Map a target industry or niche—players, jargon, pain points, and trends—before positioning, content planning, or go-to-market decisions.
Who is it for?
Developers scoping product domains who need scripted WHOIS/RDAP lookups and marketplace price checks without API keys.
Skip if: Developers who need industry competitive research, DNS propagation monitoring, or automated domain purchasing workflows.
When should I use this skill?
The user asks for domain lookup, WHOIS, RDAP, domain availability, who owns a domain, or domain marketplace listings.
What you get
Structured RDAP/WHOIS JSON, marketplace listing results, and acquisition notes for the target domain.
- RDAP/WHOIS JSON output
- Marketplace listing JSON
- Domain acquisition evaluation notes
By the numbers
- Aggregates marketplace listings from 7 domain marketplaces
- Free DomainDetails API allows 100 requests per minute without authentication
Files
Domain Research Skill
You are a domain research specialist. Look up WHOIS/RDAP data, check marketplace listings, and help evaluate domains for acquisition.
Domain Lookup (Free, No Auth Required)
WHOIS/RDAP Lookup
curl -s "https://mcp.domaindetails.com/lookup/{domain}" | jqReturns:
- Registrar: Who the domain is registered through
- Created date: When the domain was first registered
- Expiry date: When it expires
- Nameservers: DNS configuration
- DNSSEC: Whether DNSSEC is enabled
- Registrant contacts: Owner info (often privacy-protected)
- Status codes: Domain status (clientTransferProhibited, etc.)
Marketplace Listing Search
curl -s "https://api.domaindetails.com/api/marketplace/search?domain={domain}" | jqChecks listings across:
- Sedo — Largest domain marketplace
- Afternic — GoDaddy's marketplace
- Atom — Premium domains
- Dynadot — Auction and marketplace
- Namecheap — Marketplace listings
- NameSilo — Budget marketplace
- Unstoppable Domains — Web3 domains
Rate Limits
100 requests/minute, no authentication needed.
Domain Evaluation
For Brand Domains
| Factor | Weight | What to Check |
|---|---|---|
| Length | 25% | Shorter is better. <8 chars ideal, <12 acceptable |
| Memorability | 20% | Easy to spell, say, and remember |
| Brandability | 20% | Unique, ownable, not generic |
| Extension | 15% | .com > .io > .ai > .co > others |
| History | 10% | Check Wayback Machine for past use, spam, adult content |
| SEO value | 10% | Existing backlinks, domain authority |
For SEO/Content Domains
| Factor | Weight | What to Check |
|---|---|---|
| Keyword match | 25% | Contains target keyword |
| Domain authority | 25% | Check via Moz, Ahrefs, or SemRush |
| Backlink profile | 20% | Quality and quantity of existing backlinks |
| History | 15% | Clean history, no penalties |
| Extension | 15% | .com preferred for organic search |
Domain Valuation Factors
| Factor | Low Value | High Value |
|---|---|---|
| Length | 15+ characters | 1-5 characters |
| Extension | .xyz, .club | .com, .io, .ai |
| Dictionary word | No | Yes (real English word) |
| Keyword volume | <100/month | 10,000+/month |
| Existing traffic | None | Organic traffic |
| Backlinks | None | 100+ quality links |
| Age | <1 year | 10+ years |
| Comparable sales | None found | Multiple sales at $XX,XXX+ |
Research Workflow
Step 1: Check Availability
# Quick WHOIS check
curl -s "https://mcp.domaindetails.com/lookup/{domain}" | jq '.available // .registrar'Step 2: Check Marketplace Listings
curl -s "https://api.domaindetails.com/api/marketplace/search?domain={domain}" | jqStep 3: Check Domain History
Use WebFetch to check:
web.archive.org/web/*/{domain}— Past versions of the site- Historical use, content type, any red flags
Step 4: Check SEO Metrics (if SemRush available)
# Domain overview
curl -s "https://api.semrush.com/?type=domain_rank&key=${SEMRUSH_API_KEY}&domain={domain}&database=us&export_columns=Dn,Rk,Or,Ot,Oc,Ad,At,Ac"
# Backlinks overview
curl -s "https://api.semrush.com/?type=backlinks_overview&key=${SEMRUSH_API_KEY}&target={domain}&export_columns=total,domains_num,urls_num,ips_num,follows_num,nofollows_num"Step 5: Generate Alternatives
If the desired domain is taken, suggest alternatives:
Patterns:
get{brand}.com— getnotion.com{brand}hq.com— slackhq.comtry{brand}.com— tryfigma.comuse{brand}.com— usefathom.com{brand}app.com— todoistapp.com{brand}.io— linear.io{brand}.ai— jasper.ai{brand}.co— buffer.cohey{brand}.com— heysummit.com
Output Format
# Domain Research: {domain}
## WHOIS Data
| Field | Value |
|-------|-------|
| Registrar | {registrar} |
| Created | {date} |
| Expires | {date} |
| Status | {status} |
| Nameservers | {ns} |
| Privacy | {Yes/No} |
## Marketplace Listings
| Marketplace | Listed? | Price | Link |
|-------------|---------|-------|------|
| Sedo | {Yes/No} | {price} | {link} |
| Afternic | {Yes/No} | {price} | {link} |
| ... | ... | ... | ... |
## Domain Evaluation
| Factor | Score | Notes |
|--------|-------|-------|
| Length | {}/10 | {X} characters |
| Memorability | {}/10 | {assessment} |
| Brandability | {}/10 | {assessment} |
| Extension | {}/10 | {.com/.io/etc} |
| History | {}/10 | {clean/flags} |
| **Overall** | **{}/10** | |
## SEO Metrics (if available)
{Domain authority, backlinks, organic traffic}
## Alternatives (if domain is taken)
| Domain | Available? | Notes |
|--------|-----------|-------|
## Recommendation
{Buy/Pass/Negotiate — with reasoning}Important Notes
- WHOIS data is increasingly privacy-protected. Limited registrant info is normal.
- Domain marketplace prices are often negotiable. Listed price is usually the starting point.
- Always check domain history on the Wayback Machine before purchasing. Spam/adult history can carry Google penalties.
- Expired domains with backlinks can be valuable for SEO, but verify the backlinks are from legitimate sites.
- .com is still king for brand trust, but .io (tech), .ai (AI), and .co (startups) are increasingly accepted.
Related skills
How it compares
Choose domain-research over generic web search when you need structured RDAP/WHOIS JSON and multi-marketplace price rows from one curl workflow.
FAQ
Does domain-research require an API key?
domain-research uses the free DomainDetails API with no authentication. Developers can run curl against mcp.domaindetails.com/lookup/{domain} and the marketplace search endpoint immediately from a terminal or agent shell session.
What data does a domain-research WHOIS lookup return?
domain-research RDAP/WHOIS lookups return registrar name, created and expiry dates, nameserver records, DNSSEC status, and registrant contact fields as structured JSON suitable for jq filtering during acquisition reviews.
Which domain marketplaces does domain-research search?
domain-research marketplace search aggregates listings from Sedo, Afternic, Atom, Dynadot, Namecheap, NameSilo, and Unstoppable Domains through the DomainDetails marketplace API for side-by-side acquisition comparison.