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certificate-sans
x402
certificate-sans is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns all Subject Alternative Names (SANs) from the most recent TLS certificate for a domain, sourced from certificate-transparency logs, including issuer, validity window, and days remaining.
Price / call$0.01
Success—
StatusUnknown
How this service works
Subject Alternative Names of the newest certificate for a domain from certificate-transparency logs: every hostname the current cert covers, wildcard flags, issuer, validity window and days left. Reveals sibling services, staging hosts and shared certs. $0.01 per domain.
Output
A structured object containing all SAN hostnames listed in the domain's current TLS certificate (from CT logs), wildcard coverage flags, the certificate issuer (CA name), the validity window (not-before and not-after dates), and the number of days remaining before expiry.
Example use cases
Discover sibling staging hosts
“Can you pull the certificate SANs for stripe.com and tell me all the hostnames it covers, including any staging or internal-looking subdomains? I want to see if there are sibling services hiding in the cert.”
Certificate expiry monitoring
“Check the TLS certificate for api.acme.com and tell me how many days are left before it expires, plus who issued it.”
Security recon on a target domain
“I'm doing a security audit on competitor.io — can you get the Subject Alternative Names from their latest certificate transparency entry so I can map out what services they're running?”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/monitor/cert-chain-sansWhen to prefer
Choose this endpoint when you need to enumerate all hostnames covered by a domain's active TLS certificate, discover sibling services or staging environments, verify certificate issuer and expiry, or perform infrastructure reconnaissance using certificate transparency data. It is purpose-built for CT-log-sourced SAN extraction at $0.01 per call, making it cost-effective for bulk domain inspection compared to manually parsing CT log APIs.
Side effects
- Domain has no certificate logged in CT logs — returns empty or not-found result
- Domain typo or invalid hostname — may return error or no data
- Certificate transparency log delay — newest cert may lag behind actual deployment by minutes
- Private/internal CAs not logged to public CT logs — those certs won't appear
- Rate limiting or payment failure — 402 response if x402 payment not attached
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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