curl "https://ssl.newsman.app/api/1.2/rest/your_user_id/your_api_key/subscriber.initUnsubscribe.json?list_id=my_list_id&email=test%40example.com&options=null"

<?php
 
require_once("Newsman/Client.php");
 
// you can get your API KEY, your newsman_user_id and list_id from My account -> API
$newsman_user_id = "your-user-id";
$api_key = "your-api-key";
$list_id = "my_list_id"; 
$email = "test@example.com"; 
$options = null; 
 
try {
	$client = new Newsman_Client($newsman_user_id, $api_key);
	$ret = $client->subscriber->initUnsubscribe($list_id, $email, $options);
} catch (Exception $e) {
	//do something with the error, eg: log $e->getMessage()
}
 
return $ret;
 
?>

import newsman
 
user_id = "your_user_id"
api_key = "your_api_key"
list_id = "my_list_id"
subscriber_email = "test@example.com"
options = null
 
client = newsman.Newsman(user_id, api_key)
client.subscriber.initUnsubscribe(list_id, subscriber_email, options)

RESTClient client = new RESTClient("your_user_id", "your_api_key");
var _params = new NameValueCollection();
    _params["list_id"] = my_list_id;
    _params["email"] = "test@example.com";
    _params["options"] = null;
 
var response = client.CallMethod("subscriber", "initUnsubscribe", _params);