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DNS Intelligence API – SSL Certificate Lookup
x402
DNS Intelligence API – SSL Certificate Lookup is a paid API for AI agents from dns.payapi.market, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-17).
Fetches live TLS/SSL certificate details for a domain, including issuer, validity dates, SANs, cipher suite, and days remaining.
Price / call$0.002
Success—
StatusUnknown
How this service works
DNS records, WHOIS, SSL certificate, subdomain discovery, and reverse-IP lookup with x402 payments.
Output
Returns a JSON object with full SSL/TLS certificate details including: issuer (common name, organization, country), subject common name, subject alternative names (SANs), TLS version (e.g. TLSv1.3), cipher suite, certificate serial number, validity window (not_before, not_after), days remaining until expiry, and the port used for the handshake.
Example use cases
Certificate expiry monitoring alert
“Check the SSL certificate on api.mycompany.com port 443 and tell me how many days are left before it expires and who issued it.”
Security audit of TLS configuration
“Pull the live TLS certificate details for shop.acme.com — I need the TLS version, cipher suite, and issuer so I can check if it meets our security standards.”
Wildcard cert coverage verification
“Can you check the SSL cert for staging.example.com on port 8443 and confirm whether it's a wildcard cert and what subject alternative names it covers?”
Technical details
Endpoint
POSThttps://dns.payapi.market/dns/ssl?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to inspect a live, real-time TLS certificate from a domain's server rather than looking up cached or historical cert data. It is ideal for certificate expiry monitoring, security audits of cipher suites and TLS versions, verifying SAN coverage, and checking issuer chains — especially when you need current data straight from the TLS handshake rather than a certificate transparency log.
Side effects
- Domain does not exist or is unreachable — connection timeout or DNS resolution failure
- Port is not running a TLS service — handshake failure
- Self-signed or expired certificate may still be returned but flagged in context
- Invalid domain format returns a validation error
- Non-standard ports blocked by firewall return connection refused
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| port | integer | TLS port for the handshake. Defaults to 443. |
| domain | string | Domain name to fetch the live TLS certificate from, e.g. 'example.com'. |
Output
Schema · Response
{
"type": "json",
"example": {
"port": 443,
"domain": "example.com",
"issuer": {
"commonName": "DigiCert Global G3 TLS ECC SHA384 2020 CA1",
"countryName": "US",
"organizationName": "DigiCert Inc"
},
"subject": {
"commonName": "*.example.com"
},
"version": 3,
"not_after": "2026-01-15T23:59:59",
"san_count": 2,
"not_before": "2025-01-15T00:00:00",
"tls_version": "TLSv1.3",
"cipher_suite": "TLS_AES_256_GCM_SHA384",
"serial_number": "0A1B2C3D4E5F60718293A4B5C6D7E8F9",
"days_remaining": 163,
"subject_alt_names": [
"*.example.com",
"example.com"
],
"issuer_common_name": "DigiCert Global G3 TLS ECC SHA384 2020 CA1",
"issuer_organization": "DigiCert Inc",
"subject_common_name": "*.example.com"
}
}Tags
x402
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