Domain Reputation API
Know if a domain
can be trusted.
One API call. Seven checks. Instant score.
bash
curl "https://domain.subtl.dev/v1/reputation?domain=example.com" \
-H "Authorization: Bearer stl_..."Seven checks. One score.
Every domain is evaluated across multiple security signals in real-time.
WHOIS
Domain age & registrar
DNS
MX, SPF & DMARC records
Blacklists
6 major threat lists
SSL
Certificate validation
Safe Browsing
Google threat check
CT Logs
Certificate history
Tranco
Top 1M rank
See what you get.
Rich, structured response with every signal broken down.
json
{
"domain": "sketchy-store.xyz",
"score": 18,
"risk": "dangerous",
"cached": false,
"degraded": false,
"details": {
"whois": { "age_days": 12, "registrar": "Namecheap Inc." },
"dns": { "has_mx": false, "has_spf": false, "has_dmarc": false },
"blacklists": { "listed_count": 1, "checked_count": 6 },
"safe_browsing": { "flagged": true },
"ssl": { "valid": false },
"ct_logs": { "certificate_count": 0 },
"tranco": { "rank": null, "in_top_1m": false }
}
}Built for
→ Blocking disposable email signups
→ Verifying lead quality in sales pipelines
→ Detecting phishing in security tools
→ Flagging fraud in e-commerce orders
Simple pricing
Start free. Scale as you grow.