SSL/TLS Certificate Check · Check

import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);

const res = await fetchWithPay("https://ssl.use.x402atlas.com/check", {
  method: "GET",
});
const data = await res.json();

curl -X GET \
  "https://ssl.use.x402atlas.com/check?host=example.com&port=443" \
  -H "X-PAYMENT: <signed x402 payment>"

{
  "certificate": {
    "issuer_cn": "DigiCert Global G3 TLS ECC SHA384 2020 CA1",
    "issuer_org": "DigiCert Inc",
    "key_algorithm": "ECDSA",
    "key_size": 256,
    "not_after": "2027-02-15T23:59:59Z",
    "not_before": "2026-01-15T00:00:00Z",
    "sans": [
      "example.com",
      "www.example.com"
    ],
    "serial_number": "212351572002930070173044758915925313",
    "signature_algorithm": "ECDSA-SHA384",
    "subject_cn": "example.com"
  },
  "chain": {
    "chain_valid": true,
    "days_until_expiry": 228,
    "hostname_matches": true,
    "is_expired": false,
    "is_self_signed": false
  },
  "connection": {
    "cipher_suite": "TLS_AES_128_GCM_SHA256",
    "tls_version": "TLS 1.3"
  },
  "host": "example.com",
  "port": 443,
  "queried_at": "2026-07-02T12:00:00Z",
  "warnings": []
}