TLS Check API: Detect which TLS Version is Enabled

A JSON API to check if a website has an active TLS connection and see which versions (TLS 1.0, 1.1, 1.2, 1.3, SSL 2, SSL 3) are enabled. Use this API to ensure security compliance and detect outdated TLS protocols.

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Consumes 4 credits per API call

# Example Curl request from the command line:
                          
curl -X POST "https://api.apivoid.com/v2/tls-check" \
     -H "Content-Type: application/json" \
     -H "X-API-Key: YOUR_API_KEY_HERE" \
     -d '{"host": "stripe.com"}'

# Example JSON output for a 200 HTTP status code:

{
   "host": "stripe.com",
   "protocols": {
      "sslv2": {
         "enabled": false,
         "recommended_status": "disabled",
         "deprecated": true
      },
      "sslv3": {
         "enabled": false,
         "recommended_status": "disabled",
         "deprecated": true
      },
      "tlsv1.0": {
         "enabled": false,
         "recommended_status": "disabled",
         "deprecated": true
      },
      "tlsv1.1": {
         "enabled": false,
         "recommended_status": "disabled",
         "deprecated": true
      },
      "tlsv1.2": {
         "enabled": true,
         "recommended_status": "enabled",
         "deprecated": false
      },
      "tlsv1.3": {
         "enabled": true,
         "recommended_status": "enabled",
         "deprecated": false
      }
   },
   "connected": true,
   "score": "excellent",
   "elapsed_ms": 745
}

Test TLS protocols to improve security and ensure compliance

Businesses and startups use this TLS Check API to detect if and which version of TLS protocol is enabled on a website, along with checking for old SSL2 and SSL3 protocols.

Common TLS Versions

Identify which TLS protocol version is enabled on your website, make sure outdated versions are disabled.

Security Compliance

It is important for security reasons to only support modern TLS versions, which are TLS 1.2 and TLS 1.3.

Detect SSL2 and SSL3

We added support to detect also the very old (but still used in certain cases) SSL2 and SSL3 protocols.

Fast Response

The submitted domain is analyzed in real-time and the response is returned in 1-2 seconds on average.

Take a look at some real-world use cases of this API service

Our API can be used in many ways, from cybersecurity tasks to research-specific tasks. Here we showcase the most popular use cases according to our customers usage:

Identify TLS Protocols

This API can be used to quickly verify if a domain has a TLS protocol enabled and which is the version.

Detect Outdated Protocols

Make sure only modern TLS versions are enabled and the other outdated versions are effectively disabled.

Enrich SIEM Data

Using a SIEM platform? Add context to security incidents, populate domain TLS protocol information data.

Check Your Customers

Use this API to monitor and verify that your customers or suppliers are using up-to-date TLS versions.

$domain = 'stripe.com'; $apiUrl = 'https://api.apivoid.com/v2/tls-check'; $apiKey = 'your_api_key_here'; $ch = curl_init($apiUrl); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json', 'X-API-Key: ' . $apiKey]); curl_setopt($ch, CURLOPT_POST, true); curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode(['host' => $domain])); $response = curl_exec($ch); $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE); curl_close($ch); if ($httpCode === 200) { $responseData = json_decode($response, true); print_r($responseData); }