SSL Certificate Checker API

SSL Checker inspects a website's SSL certificate. It returns the certificate details plus derived signals — whether it is currently valid or expired, how many days until it expires, whether it expires soon, and whether it is self-signed.

The SSL Certificate Checker API provides a simple, reliable way to integrate ssl certificate checker functionality into your applications. Built for developers who need production-ready ssl certificate checker capabilities without the complexity of building from scratch.

View API Details →

Available on:

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Quick Start

Using JavaScript

async function callSSLCertificateCheckerAPI() {
    try {
        const params = new URLSearchParams({
            domain: 'ebay.com'
        });

        const response = await fetch(`https://api.apiverve.com/v1/sslchecker?${params}`, {
            method: 'GET',
            headers: {
                'x-api-key': 'YOUR_API_KEY_HERE'
            }
        });

        const data = await response.json();
        console.log(data);
    } catch (error) {
        console.error('Error:', error);
    }
}

callSSLCertificateCheckerAPI();

Using cURL

curl -X GET "https://api.apiverve.com/v1/sslchecker?domain=ebay.com" \
  -H "x-api-key: YOUR_API_KEY_HERE"

Get your API key: https://apiverve.com

📁 For more examples, see the examples folder

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Installation

Choose your preferred programming language:

📦 NPM (JavaScript/Node.js)

npm install @apiverve/sslchecker

View NPM Package → | Package Code →

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🔷 NuGet (.NET/C#)

dotnet add package APIVerve.API.SSLCertificateChecker

View NuGet Package → | Package Code →

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🐍 Python (PyPI)

pip install apiverve-sslchecker

View PyPI Package → | Package Code →

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💎 Ruby (RubyGems)

gem install apiverve_sslchecker

View RubyGems Package → | Package Code →

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🐘 PHP (Packagist)

composer require apiverve/sslchecker

View Packagist Package → | Package Code →

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🎯 Dart (pub.dev)

dart pub add apiverve_sslchecker

View pub.dev Package → | Package Code →

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🤖 Android (JitPack)

implementation 'com.github.apiverve:sslchecker-api:1.0.0'

Package Code →

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🐹 Go

go get github.com/apiverve/sslchecker-api/go

Package Code →

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Why Use This API?

Feature	Benefit
Multi-language SDKs	Native packages for JavaScript, Python, C#, Go, and Android
Simple Integration	Single API key authentication, consistent response format
Production Ready	99.9% uptime SLA, served from 24 global regions
Comprehensive Docs	Full examples, OpenAPI spec, and dedicated support

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Documentation

• 🏠 API Home: SSL Certificate Checker API
• 📚 API Reference: docs.apiverve.com/ref/sslchecker
• 📖 OpenAPI Spec: openapi.yaml
• 💡 Examples: examples/

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What Can You Build?

The SSL Certificate Checker API is commonly used for:

• Web Applications - Add ssl certificate checker features to your frontend or backend
• Mobile Apps - Native SDKs for Android development
• Automation - Integrate with n8n, Zapier, or custom workflows
• SaaS Products - Enhance your product with ssl certificate checker capabilities
• Data Pipelines - Process and analyze data at scale

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API Reference

Authentication

All requests require an API key in the header:

x-api-key: YOUR_API_KEY_HERE

Get your API key: https://apiverve.com

Response Format

Every APIVerve endpoint returns the same envelope — check status, then read data:

{
  "status": "ok",
  "error": null,
  "data": { ... }
}

Example Response

A real response from the SSL Certificate Checker API:

{
  "status": "ok",
  "error": null,
  "data": {
    "subject": {
      "C": "US",
      "ST": "California",
      "O": "eBay, Inc.",
      "CN": "ebay.com"
    },
    "issuer": {
      "C": "GB",
      "O": "Sectigo Limited",
      "CN": "Sectigo Public Server Authentication CA OV R36"
    },
    "subjectaltname": "DNS:ebay.com, DNS:befr.ebay.be, DNS:benl.ebay.be, DNS:cafr.ebay.ca, DNS:e-bay.it, DNS:ebay.at, DNS:ebay.be, DNS:ebay.ca, DNS:ebay.ch, DNS:ebay.co.uk, DNS:ebay.com.au, DNS:ebay.com.hk, DNS:ebay.com.my, DNS:ebay.com.sg, DNS:ebay.de, DNS:ebay.es, DNS:ebay.fr, DNS:ebay.ie, DNS:ebay.in, DNS:ebay.it, DNS:ebay.nl, DNS:ebay.ph, DNS:ebay.pl, DNS:ebay.us, DNS:ebay.vn, DNS:wwww.ebay.co.uk, DNS:wwww.ebay.com, DNS:wwww.ebay.com.au, DNS:wwww.ebay.de, DNS:wwww.ebay.in, DNS:wwww.ebay.it",
    "infoAccess": {
      "CA Issuers - URI": [
        "http://crt.sectigo.com/SectigoPublicServerAuthenticationCAOVR36.crt"
      ],
      "OCSP - URI": [
        "http://ocsp.sectigo.com"
      ]
    },
    "ca": false,
    "bits": 2048,
    "valid_from": "Jul 28 00:00:00 2025 GMT",
    "valid_to": "Jul 28 23:59:59 2026 GMT",
    "serialNumber": "99F408949A6416EDC3B8F5EC77B2EBE5",
    "domain": "ebay.com",
    "isExpired": false,
    "isValid": true,
    "daysUntilExpiry": 20,
    "isExpiringSoon": true,
    "isSelfSigned": false
  }
}

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Support & Community

• 🏠 API Home: SSL Certificate Checker API
• 💬 Support: https://apiverve.com/contact
• 🐛 Issues: GitHub Issues
• 📖 Documentation: https://docs.apiverve.com
• 🌐 Website: https://apiverve.com

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Contributing

We welcome contributions! Please see CONTRIBUTING.md for guidelines.

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Security

For security concerns, please review our Security Policy.

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License

This project is licensed under the MIT License - see the LICENSE file for details.

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Acknowledgments

Built with ❤️ by APIVerve

Copyright © 2026 APIVerve. All rights reserved.