Free SSL Monitoring API - Check Certificates

Parameters

name	in	type	required	description
`domain`	query	string	required	Without https://
`port`	query	number	optional	Default is 443 (HTTPS) range `1 to 65535` default `443`

Request

Send your key in the X-API-Key header. More languages and patterns live on the code examples page.

curl -s "https://apixies.io/api/v1/inspect-ssl?domain=stripe.com" \
  -H "X-API-Key: YOUR_API_KEY"

const res = await fetch("https://apixies.io/api/v1/inspect-ssl?domain=stripe.com", {
  headers: { "X-API-Key": "YOUR_API_KEY" }
});
const data = await res.json();
console.log(data);

$ch = curl_init("https://apixies.io/api/v1/inspect-ssl?domain=stripe.com");
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => ["X-API-Key: YOUR_API_KEY"],
]);
$data = json_decode(curl_exec($ch), true);
curl_close($ch);

print_r($data);

import requests

res = requests.get(
    "https://apixies.io/api/v1/inspect-ssl",
    params={"domain": "stripe.com"},
    headers={"X-API-Key": "YOUR_API_KEY"},
)
print(res.json())

Response

The result sits under data in the standard envelope. See the response format guide for errors and status codes.

returns

data.days_until_expiry: Days left before the certificate expires.
data.valid: True when the cert is current, matches the domain and isn't self-signed.
data.valid_to: Expiry date of the certificate, with the start date in valid_from.
data.issuer: The certificate authority that signed it.
data.alt_names: Every hostname the certificate covers.
data.validation_issues: Problems found, like an expired cert or a hostname mismatch.

example response 200

{
    "status": "success",
    "http_code": 200,
    "code": "SUCCESS",
    "message": "SSL inspection successful",
    "data": {
        "domain": "stripe.com",
        "port": 443,
        "valid": true,
        "issuer": "C=US, O=DigiCert Inc, CN=DigiCert Global G3 TLS ECC SHA384 2020 CA1",
        "subject": "jurisdictionC=US, jurisdictionST=Delaware, businessCategory=Private Organization, serialNumber=4675506, C=US, ST=California, L=South San Francisco, O=Stripe, LLC, CN=stripe.com",
        "common_name": "stripe.com",
        "alt_names": [
            "stripe.com",
            "www.stripe.com"
        ],
        "valid_from": "2026-07-28 00:00:00",
        "valid_to": "2026-11-12 23:59:59",
        "days_until_expiry": 55,
        "is_self_signed": false,
        "signature_algorithm": "ecdsa-with-SHA384",
        "validation_issues": []
    }
}

Authentication and limits

This endpoint needs an API key. Use the sandbox ("try it" above) to test it without registering. See the authentication guide for details.

Standard rate limits apply to this endpoint.

Common use cases

Monitor certificate expiry in CI/CD

Integrate the SSL Health Inspector into your deployment pipeline to catch expiring certificates before they cause downtime. Set up alerts when certificates have fewer than 30 days remaining.

Build a domain monitoring dashboard

Combine with the DNS Lookup and Security Headers endpoints to create a comprehensive domain health dashboard that tracks SSL status alongside DNS configuration and security posture.

Audit client websites

Web agencies can batch-check SSL certificates across all client domains, generating automated reports on certificate validity and upcoming renewals.

related endpoints

GET Security Headers Inspector Inspect security headers for a URL to check for adherence to current best practices GET DNS Lookup Resolve DNS records (A, AAAA, MX, TXT, CNAME, NS, SOA, SRV, CAA, PTR) for any domain GET Link Checker Check if a URL is reachable and return its HTTP status code and response time

guides

SSL Certificate API Tutorial tutorial Learn how to check SSL certificates with the Apixies API. Get expiry dates, issuer info, and chain health for any domain... Automated SSL Certificate Monitoring use-case Set up automated SSL certificate monitoring with a free API and cron jobs. Get alerts before certs expire. No signup, wo...

getting started

authentication code examples response format

explore

all api endpoints guides and tutorials online tools

resources

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Get a free API key

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