ToolVet
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Cert Transparency

by Certificate transparency search in Search & web

x402 APIPassing, checked 3 h ago

Search public Certificate Transparency logs for every cert issued to a domain. Two independent public CT search services are queried, the second only if the first is slow or fails, and `source` names the one that answered (their coverage windows differ). Returns the cert list plus a deduped subdomain set extracted from the SANs - the fastest way to enumerate subdomains for a security audit. No key required.

POST https://agent402.tools/api/cert-transparency

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
266 ms typical, 266 ms slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://agent402.tools/api/cert-transparency" \
  -H "content-type: application/json" \
  -d '{"domain":"agent402.tools"}'
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.03:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent402.tools%2Fapi%2Fcert-transparency
const res = await pay("https://agent402.tools/api/cert-transparency", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"domain":"agent402.tools"}),
});
console.log(await res.json());

Example input

{
  "domain": "agent402.tools"
}

Example output

{
  "certs": [
    {
      "commonName": "agent402.tools",
      "id": 1234567890,
      "issuer": "C=US, O=Let's Encrypt, CN=E5",
      "notAfter": "2027-02-14T23:59:59",
      "notBefore": "2026-01-15T00:00:00",
      "sans": [
        "agent402.tools"
      ],
      "serial": "0a:1b:2c"
    }
  ],
  "count": 2,
  "domain": "agent402.tools",
  "queriedAt": "2026-06-19T22:00:00.000Z",
  "source": "crt.sh",
  "subdomains": [
    "agent402.tools"
  ],
  "truncated": false
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
3 h agoPassed402266 ms$0.005