using System ;
using System.Net ;
using System.IO ;
using System.Web ;

protected void SendMessage()
{
string username="+4540818824″ ;
string password="12345″ ;
string tophonenumberwithcountrycode="+4540818824″ ;
string fromMax11Char="Santa" ;
string theMessage = "Hello world ! Je peux envoyer des caractères spéciaux comme æ ø et å" ;

string pathtouse = "https://api.suresms.com/Script/SendSMS.aspx?login=" + username + "&password=" + password +
"&to=" + tophonenumberwithcountrycode + "&from=" + fromMax11Char + "&Text=" + WebUtility.UrlEncode(theMessage) ;

/* Appel du chemin d'accès */
WebRequest wrGETURL ;
wrGETURL = WebRequest.Create(pathtouse) ;
Stream objStream ;
objStream = wrGETURL.GetResponse().GetResponseStream() ;
}

$message = "Votre message" ;

$curlUrl = "https://api.suresms.com/script/sendsms.aspx?login=USER&password=PASSWORD&to=+". $phone . "&from=SENDER&message=". urlencode ( $message ) ;

ob_start() ;
$curl = curl_init() ;
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1) ;
curl_setopt($curl, CURLOPT_URL, $curlUrl) ;
$result = curl_exec ($curl) ;

$hs = curl_getinfo($curl, CURLINFO_HEADER_SIZE) ;
$header = substr($result, 0, $hs) ;
$body = substr($result, $hs) ;

curl_close ($curl) ;
ob_end_clean() ;

if(0 == strcmp(substr($header, 0, 13), "Message envoyé.") )
{
   /Le sms a été envoyé
}
else
{
   //The sms was NOT sent
}

curl -G --data-urlencode --data-urlencode https://api.suresms.com/script/sendsms.aspx?to=+4512345678&body=helo world

$ToDoDirectory = 'C:\Temp\Inbox' (Répertoire à faire)
$FinishedDirectory = 'C:\Temp\SentBox' (répertoire terminé)
$urlTemplate = 'https://api.suresms.com/Script/SendSMS.aspx?login={0}&password={1}&to={2}&Text={3}'
$smsGateLogin = 'xxxx'
$smsGatePassword = 'yyyyy'

 $filesToDo = @([ System.IO.Directory]::EnumerateFiles($ToDoDirectory,'*.sms', [ System.IO.SearchOption]::TopDirectoryOnly))
foreach ($fileToDo in $filesToDo)
{

$smsNumber = get-content -path $fileToDo |Select-Object -First 1
$smsText = get-content -path $fileToDo |Select-Object -Last 1

$uri = [String]::Format($urlTemplate, $smsGateLogin, $smsGatePassword, $smsNumber, $smsText)
$requestResult = Invoke-WebRequest -Method get -Uri $uri


$destSmsFile = [System.IO.Path]::Combine($FinishedDirectory, [ System.IO.Path]::GetFileName($fileToDo))
[System.IO.File]::Move($fileToDo, $destSmsFile)
}

import json
demandes d'importation
temps d'importation

auth_headers = {'Accept' : 'application/json'}
auth_payload = {
"grant_type" : "password",
"Nom d'utilisateur" : "******",
"mot de passe" : "*******"
}

r = requests.post("https://api.suresms.com/json/token", data=auth_payload, headers=auth_headers)
auth_response = json.loads(r.text)
temps.sleep(1)

print "Envoi d'un SMS !"
charge utile = {
"MessageID" : "etId",
"MessageText" : "Test Friday the 3rd of November. Maintenant c'est le jour J",
"ToPhoneNumbers": "4520xxxx;4529xxxx",
"SenderID" : "Allerup",
"SendAsFlash" : Faux,
"HasCallBackURL" : "",
"RequiredDeliveryUTCDateTime": "2017-11-03T09:06:00.810Z",
"ScheduleDaily" : Faux,
"ScheduleDailyExceptWeekend" : Faux,
"ScheduleWeekly" : Faux,
"ScheduleMonthly" : Faux,
"ScheduleYearly" : Faux}

headers = {'Authorisation' : 'Bearer ' + str(auth_response["access_token"])}

r = requests.post("https://api.suresms.com/json/api/Message", data=payload, headers=headers)
print(r.text)

Pour plus d'exemples, voir https://developer.suresms.com.