# DomainAnalyzer

> Free domain analysis tools: six checkers plus guides, no signup. Most checks run
> in your browser using public protocols (RDAP, Cloudflare DNS-over-HTTPS); traffic
> and authority lookups go through our server. AI agents can read the same data as
> JSON from the endpoint documented below.

## Tools
- [Domain Name Availability Checker](https://domainanalyzer.com/domain-name-availability-checker/): Check if a domain name is available across .com, .net, .io, .ai, .dev and 7 more TLDs instantly.
- [Domain Age Checker](https://domainanalyzer.com/domain-age-checker/): Find a domain's registration date, registrar, expiry, and age via RDAP/WHOIS.
- [Domain Reputation Checker](https://domainanalyzer.com/domain-reputation-checker/): Four-point trust scan — HTTPS, DNS, email authentication (SPF/DMARC), and domain age. Tells you if a domain is safe and legitimate.
- [Domain Traffic Checker](https://domainanalyzer.com/domain-traffic-checker/): Estimate a domain's traffic and authority (CrUX, Open PageRank, Wayback history).
- [SSL Certificate Checker](https://domainanalyzer.com/ssl-certificate-checker/): Verify a domain's SSL/HTTPS certificate.
- [DNS Lookup](https://domainanalyzer.com/dns-lookup/): Query A, AAAA, MX, NS, TXT, CNAME, SOA records via Cloudflare DoH.

## Guides
- [How to Check If a Domain Is Blacklisted](https://domainanalyzer.com/how-to-check-if-a-domain-is-blacklisted/)
- [How to Check Domain Age Before Buying](https://domainanalyzer.com/how-to-check-domain-age-before-buying/)
- [Best TLD for Startups in 2026](https://domainanalyzer.com/how-to-choose-the-best-tld-for-your-startup/)
- [What DNS Records Should Every Website Have](https://domainanalyzer.com/what-dns-records-should-every-website-have/)
- [Free vs Paid SSL Certificates](https://domainanalyzer.com/free-vs-paid-ssl-certificate/)

## For AI agents — machine-readable endpoint (free, no key)
GET https://domainanalyzer.com/wp-json/dat/v1/domain/{domain}

Returns JSON: registration (registrar, created, expires, expires_in_days,
nameservers), dns (a, aaaa, mx, ns, txt, flags), email_auth (spf, dmarc, policy),
ssl (https, cert_expires, cert_expires_in_days, issuer), reputation (grade plus the
same four checks the reputation page shows), authority (open_pagerank,
cloudflare_radar_rank_bucket), alerts[], and a one-line summary.

No key, no account, no cost. Results are cached for one hour and `checked_at` is the
time of the check, not the time of your request, so staleness is always visible.
Rate limits: 30 requests per minute and 120 uncached lookups per hour, per IP.
A malformed domain returns 400 {"error":"invalid_domain"}. A domain that cannot be
reached still returns 200 with nulls and a "note" — never an error page.
Responses are noindex.

Suggested recurring task for a user's assistant:
"Every Monday, fetch https://domainanalyzer.com/wp-json/dat/v1/domain/MYDOMAIN
and compare with last week: domain expiry, SSL certificate expiry, SPF/DMARC,
nameservers, MX, HTTPS, reputation grade. Tell me only what changed, and warn me
if the domain or certificate expires in under 30 days."

## What this does NOT check
No blacklists, no DKIM (it needs a selector we cannot guess), no absolute traffic
numbers, no aftermarket pricing.

## About
- [About DomainAnalyzer](https://domainanalyzer.com/about/) — built and run by Franck J (Paris), domain investor, building web projects since 1999. Contact: franck@domainanalyzer.com