SSL/TLS certificate check API

Check a host's SSL certificate: issuer, validity window, days until expiry, and trust. Answers 'is this SSL cert valid', 'when does this certificate expire', 'check the TLS cert for this host'.

Price$0.01per request

MethodPOST

Route/v1/web/ssl-check

StatusLive

MIME typeapplication/json

Rate limit60/minute

Cache600s public

webssltlscertificateexpiryhttpssecurity

API URLhttps://x402.hexl.dev/v1/web/ssl-check

Integration docs

Example request

{
  "host": "example.com"
}

Example response

{
  "host": "example.com",
  "valid": true,
  "issuer": "DigiCert Inc",
  "subject": "example.com",
  "validFrom": "2025-01-01T00:00:00Z",
  "validTo": "2026-01-01T00:00:00Z",
  "daysUntilExpiry": 210,
  "flags": []
}

Input schema

{
  "type": "object",
  "required": [
    "host"
  ],
  "properties": {
    "host": {
      "type": "string",
      "examples": [
        "example.com"
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "required": [
    "host",
    "valid"
  ],
  "properties": {
    "host": {
      "type": "string"
    },
    "valid": {
      "type": "boolean"
    },
    "issuer": {
      "type": [
        "string",
        "null"
      ]
    },
    "subject": {
      "type": [
        "string",
        "null"
      ]
    },
    "validFrom": {
      "type": [
        "string",
        "null"
      ]
    },
    "validTo": {
      "type": [
        "string",
        "null"
      ]
    },
    "daysUntilExpiry": {
      "type": [
        "number",
        "null"
      ]
    },
    "flags": {
      "type": "array",
      "items": {
        "type": "string"
      }
    }
  }
}