SSL Certificate Checker API

SSL Checker is an SSL certificate API that connects to a website and checks its live certificate in seconds. It returns the certificate details, whether the chain verifies to a trusted root and matches the hostname, the negotiated TLS version and cipher, HSTS and OCSP stapling, plus expiry signals: valid or expired, days until expiry, expiring soon and 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 →

Method Platform

Available on: JitPack

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

Installation

Choose your preferred programming language:

📦 NPM (JavaScript/Node.js)

npm install @apiverve/sslchecker

View NPM Package → | Package Code →

🔷 NuGet (.NET/C#)

dotnet add package APIVerve.API.SSLCertificateChecker

View NuGet Package → | Package Code →

🐍 Python (PyPI)

pip install apiverve-sslchecker

View PyPI Package → | Package Code →

💎 Ruby (RubyGems)

gem install apiverve_sslchecker

View RubyGems Package → | Package Code →

🐘 PHP (Packagist)

composer require apiverve/sslchecker

View Packagist Package → | Package Code →

🎯 Dart (pub.dev)

dart pub add apiverve_sslchecker

View pub.dev Package → | Package Code →

🤖 Android (JitPack)

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

Package Code →

🐹 Go

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

Package Code →

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

Documentation

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

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

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 R40"
    },
    "subjectaltname": "DNS:ebay.com, DNS:befr.ebay.be, DNS:benl.ebay.be, DNS:cafr.ebay.ca, DNS:e-bay.com, DNS:e-bay.it, DNS:ebay.at, DNS:ebay.be, DNS:ebay.ca, DNS:ebay.ch, DNS:ebay.co.nz, DNS:ebay.co.uk, DNS:ebay.com.au, DNS:ebay.com.cn, DNS:ebay.com.hk, DNS:ebay.com.my, DNS:ebay.com.ph, DNS:ebay.com.sg, DNS:ebay.de, DNS:ebay.es, DNS:ebay.fr, DNS:ebay.ie, DNS:ebay.in, DNS:ebay.io, DNS:ebay.it, DNS:ebay.nl, DNS:ebay.ph, DNS:ebay.pl, DNS:ebay.us, DNS:ebay.vn, DNS:shorturiweb.ebay.com, 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/SectigoPublicServerAuthenticationCAOVR40.crt"
      ],
      "OCSP - URI": [
        "http://ocsp.sectigo.com"
      ]
    },
    "ca": false,
    "bits": 2048,
    "valid_from": "Oct  6 00:00:00 2026 GMT",
    "valid_to": "Apr 22 23:59:59 2027 GMT",
    "serialNumber": "19FD41E42C169CF248511D2BEE660A83",
    "domain": "ebay.com",
    "isExpired": false,
    "isValid": true,
    "daysUntilExpiry": 182,
    "isExpiringSoon": false,
    "isSelfSigned": false,
    "protocol": "TLSv1.3",
    "cipher": "TLS_AES_128_GCM_SHA256",
    "isTrusted": true,
    "trustError": null,
    "hostnameMatches": true,
    "chain": [
      {
        "subject": "ebay.com",
        "issuer": "Sectigo Public Server Authentication CA OV R40",
        "validTo": "Apr 22 23:59:59 2027 GMT",
        "isCA": false
      },
      {
        "subject": "Sectigo Public Server Authentication CA OV R40",
        "issuer": "Sectigo Public Server Authentication Root R46",
        "validTo": "May 13 23:59:59 2040 GMT",
        "isCA": true
      },
      {
        "subject": "Sectigo Public Server Authentication Root R46",
        "issuer": "USERTrust RSA Certification Authority",
        "validTo": "Jan 18 23:59:59 2038 GMT",
        "isCA": true
      },
      {
        "subject": "USERTrust RSA Certification Authority",
        "issuer": "USERTrust RSA Certification Authority",
        "validTo": "Jan 18 23:59:59 2038 GMT",
        "isCA": true
      }
    ],
    "keyType": "RSA",
    "signatureAlgorithm": "sha256WithRSAEncryption",
    "hasEmbeddedSCTs": true,
    "ocspStapled": true,
    "hsts": {
      "present": true,
      "maxAge": 31536000,
      "includeSubDomains": false,
      "preload": false
    }
  }
}

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

Contributing

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

Security

For security concerns, please review our Security Policy.

License

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

Acknowledgments

Built with ❤️ by APIVerve

apiverve_sslchecker

Runtime