What SSL information does the API return?

Certificate issuer, validity dates, expiration status, days until expiry, protocol version, cipher suite, and certificate chain details.

Can I monitor certificate expiration?

Yes. Set up a scheduled check and alert when certificates are within 30 days of expiring to prevent downtime.

Does it support wildcard certificates?

Yes. The API correctly identifies and reports on wildcard certificates (*.example.com).

What happens with self-signed certificates?

Self-signed certificates are detected and reported. The API notes that the certificate is not issued by a trusted CA.

Can I check multiple domains at once?

Each API call checks one domain. For bulk checking, make concurrent API calls with Pro or Business plans.

What SSL information does the API return?

Certificate issuer, validity dates, expiration status, days until expiry, protocol version, cipher suite, and certificate chain details.

Can I monitor certificate expiration?

Yes. Set up a scheduled check and alert when certificates are within 30 days of expiring to prevent downtime.

Does it support wildcard certificates?

Yes. The API correctly identifies and reports on wildcard certificates (*.example.com).

What happens with self-signed certificates?

Self-signed certificates are detected and reported. The API notes that the certificate is not issued by a trusted CA.

Can I check multiple domains at once?

Each API call checks one domain. For bulk checking, make concurrent API calls with Pro or Business plans.

🔒 Certificate Monitoring

SSL Certificate Checker API
Free Developer API

Check SSL certificate status, expiration dates, chain validation, and security details for any website. Perfect for monitoring, compliance, and security audits.

Get Started Free View Documentation

100 requests/month free • No credit card required

How It Works

Send Website URL

POST the website URL or domain you want to check

Certificate Analysis

Our system analyzes the SSL/TLS certificate chain and security details

Get Security Report

Receive detailed certificate information, expiration, and validation status

Key Features

🔒

Certificate Details

Full certificate chain analysis including issuer, subject, serial number, and signature algorithm.

📅

Expiry Monitoring

Check certificate expiration dates and get days-remaining calculations for proactive renewal.

🔗

Chain Validation

Verify the complete certificate chain from leaf to root CA for proper trust establishment.

⚠️

Protocol Analysis

Detect supported TLS versions, cipher suites, and identify weak or deprecated configurations.

🛡️

Vulnerability Detection

Check for known vulnerabilities like Heartbleed, POODLE, and weak key sizes.

📊

SSL Grade Rating

Get an overall security grade (A+ to F) based on industry-standard SSL/TLS best practices.

Use Cases

🔔

Expiry Alerts

Monitor SSL certificates across all your domains and get notified before they expire, preventing costly downtime.

✅

Compliance Auditing

Verify SSL/TLS configurations meet PCI DSS, HIPAA, or SOC 2 compliance requirements automatically.

🏗️

DevOps Automation

Integrate SSL checks into CI/CD pipelines to catch certificate issues before they reach production.

📈

Security Dashboards

Build real-time security dashboards showing certificate health across your entire infrastructure.

Pricing

Free

€0/month

✓ 100 requests/month
✓ All features
✓ API documentation
✓ Email support

Get Started

Pro

€9/month

✓ 10,000 API calls/month
✓ All 5 APIs included
✓ Priority support
✓ 99.9% SLA

Choose Pro

Business

€29/month

✓ 50,000 API calls/month
✓ Dedicated support
✓ Custom rate limits
✓ SLA guarantee

Choose Business

Quick Start

curl -s "{https://api.toolcenter.dev/v1/ssl?domain=example.com}" \
  -H "Authorization: Bearer YOUR_API_KEY"

const response = await fetch(
  'https://api.toolcenter.dev/v1/ssl?domain=example.com',
  {headers: {'Authorization': 'Bearer YOUR_API_KEY'}}
);
const data = await response.json();
console.log(data);

import requests

response = requests.get(
    'https://api.toolcenter.dev/v1/ssl?domain=example.com',
    headers={"Authorization": "Bearer YOUR_API_KEY"}
)
print(response.json())

Frequently Asked Questions

Ready to Get Started?

Join thousands of developers using our SSL Certificate Checker API.

Start Free Today

SSL Certificate Checker API Free Developer API