curl -X DELETE https://api2.ecomailapp.cz/lists/1/unsubscribe \
  -H "key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"email": "foo@bar.cz"}'

$listId = 1;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://api2.ecomailapp.cz/lists/{$listId}/unsubscribe");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'DELETE');
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'key: YOUR_API_KEY',
    'Content-Type: application/json',
]);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode([
    'email' => 'foo@bar.cz',
]));
$response = curl_exec($ch);
curl_close($ch);

{
  "id": 4,
  "list_id": 1,
  "email": "foo@bar.cz",
  "status": 2,
  "subscribed_at": "2024-11-27T11:18:00.000000Z",
  "unsubscribed_at": "2024-11-27T11:39:16.000000Z",
  "custom_fields": { "mergetag": "content" },
  "source": "api"
}