MonitoringMAINTAINED10 tokens / call

SSL Checker Api

The SSL Checker API provides an easy and reliable way to programmatically check the SSL certificate status of any domain. Whether you're building a monitoring tool, automating security checks, or simply ensuring your websites never suffer from expired certificates, this API helps you stay ahead.

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response.json

{
  "success": true,
  "data": {
    "hostname": "wikipedia.org",
    "port": 443,
    "valid": true,
    "validFrom": "Oct  9 23:02:03 2025 GMT",
    "validTo": "Jan  7 23:02:02 2026 GMT",
    "daysUntilExpiry": 35,
    "issuer": {
      "C": "US",
      "O": "Lets Encrypt",
      "CN": "E7"
    },
    "subject": {
      "CN": "*.wikipedia.org"
    },
    "serialNumber": "05E99AFAE9E9285C9A6B8CA6FEFF26C23F9B",
    "fingerprint": "28:F1:C8:C5:9F:B5:BC:B6:B6:37:54:D7:A4:E7:21:61:38:D3:AB:D7",
    "keyUsage": [
      "1.3.6.1.5.5.7.3.1",
      "1.3.6.1.5.5.7.3.2"
    ],
    "subjectAltName": "DNS:*.wikipedia.org, DNS:*.wikimedia.org, DNS:*.wikidata.org, DNS:*.wiktionary.org, DNS:wikipedia.org, DNS:wikimedia.org",
    "cipher": {
      "name": "TLS_AES_128_GCM_SHA256",
      "standardName": "TLS_AES_128_GCM_SHA256",
      "version": "TLSv1.3"
    },
    "protocol": "TLSv1.3",
    "authorized": true,
    "authorizationError": null
  }
}

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Why developers pick this API

Production-ready, not
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Production Ready

Battle-tested infrastructure with a 99.9% uptime SLA. Rate limits are generous, responses are consistent.

Simple Integration

Standard REST + JSON. Works with any HTTP client. Copy-ready code snippets in 4 languages.

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Code snippets

One install.
Every endpoint.

No proprietary SDKs needed. Any HTTP client works. Pick your language and paste.

3languages

1endpoints

RESTarchitecture

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Fully typed responses — auto-completion in your IDE
Tracks the API in lockstep — new endpoints land same day
One key works across 120+ APIs on the platform

import axios from 'axios';

const { data } = await axios.get(
  '{API_URL}',
  { headers: { 'X-Api-Key': process.env.API_KEY } }
);

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Developer playground

Explore the endpoints

Browse request parameters and inspect live example responses.

Available Endpoints

Request Parameters

API URL

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Headers

X-Api-Key

Query Parameters

hostname(Required)

port(Optional)

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Target:

Client:

import axios from 'axios';

const url = '{API_URL}';
const { data } = await axios.get(url, {
  headers: { 'X-Api-Key': 'YOUR_API_KEY' }
});

Pricing

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