# SiteCheck SSL Certificate Transparency Lookup

> 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.

## Facts

- Endpoint: GET https://api.fadeandco.workers.dev/api/agent-intel/ssl-certificate-transparency?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-ssl-certificate-transparency-lookup-5d83d771
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fRYgD5pYSnibrbZ195UgA

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sitecheck-ssl-certificate-transparency-lookup-5d83d771
```

Example prompt: Can you pull the recent Certificate Transparency log entries for stripe.com and tell me if any certificates were issued covering names outside that domain?

## When to prefer this

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).

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Domain such as example.org (a URL is reduced to its host)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "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"
    ]
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-ssl-certificate-transparency-lookup-5d83d771/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.fadeandco.workers.dev](https://www.zero.xyz/host/api.fadeandco.workers.dev/llms.txt)