SSL/TLS Certificate Checker

x402

SSL/TLS Certificate Checker is a paid API for AI agents from api.strale.io, paid per call via x402, $0.0324/call, status unknown (last checked 2026-10-12).

Checks a domain's SSL/TLS certificate and returns issuer, validity dates, days until expiry, protocol version, cipher suite, and SAN entries.

Price / call$0.0324

Seller volume →—

Success—

StatusUnknown

How this service works

Check a domain's SSL/TLS certificate. Returns issuer, validity dates, days until expiry, protocol version, cipher, and SAN entries.

Output

Returns structured certificate data including the issuer organization, certificate validity start and end dates, number of days remaining until expiry, TLS/SSL protocol version (e.g. TLSv1.3), cipher suite in use, and the list of Subject Alternative Names (SANs) covered by the certificate.

Example use cases

Example prompt

“Can you check the SSL certificate for stripe.com — I want to know the issuer, how many days until it expires, the TLS protocol version, and what SANs are listed?”

Technical details

Endpoint

GEThttps://api.strale.io/x402/ssl-check?utm_source=zero.xyz

When to prefer

Use this endpoint when you need quick, structured SSL/TLS certificate metadata for a domain — especially expiry monitoring, issuer verification, protocol/cipher auditing, or SAN coverage checks. Prefer over manual openssl commands or browser inspection when programmatic, agent-accessible output is needed.

Side effects

Domain not found or does not resolve — returns error indicating DNS failure
Domain has no SSL certificate or serves on non-standard port — returns connection error
Certificate is self-signed or invalid — may still return data but flagged accordingly
Malformed domain input — returns validation error
Timeout if domain is unreachable or slow to respond

Input

{
  "domain": "example.com"
}

Schema · Request body

Field	Type	Description
domainrequired	string	Domain name (e.g. example.com)

Output

{
  "_meta": {
    "payment": {
      "method": "x402",
      "price_usd": 0.0324,
      "settlement_id": "0x1868fc2be59fc69e855f0f1c76c033e074749c6987cdc6ed252f5a7542b4ed42"
    },
    "capability": "ssl-check",
    "latency_ms": 8,
    "provenance": {
      "source": "tls-handshake",
      "fetched_at": "2026-06-13T04:24:00.794Z"
    }
  },
  "valid": true,
  "domain": "example.com",
  "issuer": "SSL Corporation",
  "subject": "example.com",
  "protocol": "TLSv1.3",
  "valid_to": "2026-08-29T21:41:26.000Z",
  "is_expired": false,
  "valid_from": "2026-05-31T21:39:12.000Z",
  "cipher_name": "TLS_AES_256_GCM_SHA384",
  "serial_number": "1AA73FEA257BE3334B9A29552E6F878E",
  "cipher_version": "TLSv1.3",
  "is_expiring_soon": false,
  "days_until_expiry": 77,
  "subject_alt_names": [
    "example.com",
    "*.example.com"
  ],
  "fingerprint_sha256": "BE:AB:14:CF:39:67:8F:DA:0E:F1:60:6E:ED:B8:18:C2:29:8B:A2:CC:7A:00:88:6E:7D:C2:D2:41:0F:24:CD:35"
}

Schema · Response

{
  "valid": {
    "type": "boolean"
  },
  "domain": {
    "type": "string"
  },
  "issuer": {
    "type": "string"
  },
  "valid_to": {
    "type": "string"
  },
  "is_expired": {
    "type": "boolean"
  },
  "days_until_expiry": {
    "type": "integer"
  }
}

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