curl https://api2.ecomailapp.cz/domains \
  -H "key: YOUR_API_KEY" \
  -H "Content-Type: application/json"

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://api2.ecomailapp.cz/domains');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'key: YOUR_API_KEY',
    'Content-Type: application/json',
]);
$response = curl_exec($ch);
curl_close($ch);

[
  {
    "name": "foo.cz",
    "valid": true,
    "blocked": false
  },
  {
    "name": "bar.cz",
    "valid": false,
    "blocked": false
  }
]