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SiteCheck SSL Certificate Transparency Lookup
x402
SiteCheck SSL Certificate Transparency Lookup is a paid API for AI agents from api.fadeandco.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Returns the 10 most recent TLS certificates logged for a domain via Certificate Transparency (Cert Spotter), including issuer, validity dates, covered names, and any names outside the queried domain.
Price / call$0.002
Success—
StatusUnknown
How this service works
Recent TLS certificates logged for a domain (Certificate Transparency via Cert Spotter's public index): issuer, validity dates, names on the certificate, and any name outside the domain. Shows the 10 newest; does not check revocation or the live server's certificate chain.
Output
A JSON object containing the queried domain, a timestamp, the count of certificates found, a count of flagged entries, the source URL (Cert Spotter API), a note about scope limitations, and an array of up to 10 certificate records each with: certificate ID, issuer name, notBefore/notAfter validity dates, array of covered DNS names, expiry boolean, revoked-in-log boolean, and an array of names that fall outside the queried domain.
Example use cases
Security audit for a company domain
“Check the certificate transparency logs for acmecorp.com — I want to see who has issued TLS certificates for it recently and whether any of those certs cover domain names outside acmecorp.com.”
Detecting rogue certificate issuance
“Has anyone issued an SSL certificate for mybankingsite.com that covers unexpected domains? Pull the CT log history and flag anything that looks suspicious.”
Pre-launch domain certificate review
“We're about to launch newproduct.io — can you check what TLS certificates have already been logged for that domain in the certificate transparency index so I know if someone else has been issuing certs for it?”
Technical details
Endpoint
GEThttps://api.fadeandco.workers.dev/api/agent-intel/ssl-certificate-transparency?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, structured view of recent Certificate Transparency log entries for a specific domain — particularly for security investigations, detecting unauthorized or anomalous certificate issuances, or auditing which CAs have issued certs for a domain. Prefer this over manual CT log searches when you need machine-readable output with pre-flagged out-of-domain names. Note: it does not check the live server's certificate chain or perform real-time revocation checks (OCSP/CRL).
Side effects
- Missing or invalid domain parameter returns an error
- Domain with no CT log entries returns count:0 and empty certificates array
- Malformed domain (e.g. full URL passed) is reduced to host — may behave unexpectedly if reduction fails
- Cert Spotter API upstream unavailability causes failure
- Revocation status is not live-checked — revokedInLog may be stale or incomplete
- Only 10 most recent certificates are returned — older issuances are not visible
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"note": "Shows names logged for the domain (including subdomains). Names outside the domain are a lead to check, not proof of a rogue certificate. Revocation is not checked.",
"count": 9,
"domain": "example.org",
"source": "https://api.certspotter.com/v1/issuances",
"flagged": 3,
"checkedAt": "2026-10-23T09:35:21.132Z",
"certificates": [
{
"id": "12809115180",
"names": [
"example.com",
"example.edu"
],
"issuer": "Sectigo",
"expired": false,
"notAfter": "2026-11-20T23:59:59Z",
"notBefore": "2025-11-20T00:00:00Z",
"revokedInLog": true,
"namesOutsideDomain": [
"example.com",
"example.edu"
]
},
{
"id": "12822827438",
"names": [
"example.com",
"example.edu"
],
"issuer": "Sectigo",
"expired": false,
"notAfter": "2026-11-21T23:59:59Z",
"notBefore": "2025-11-21T00:00:00Z",
"revokedInLog": false,
"namesOutsideDomain": [
"example.com",
"example.edu"
]
}
]
}
}Tags
x402
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