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SMS API: SMS Gateway Developer API

  With the TxtImpact SMS API, you have access to powerful text messaging functionality for integration into your existing and new web and enterprise applications.
Send SMS Text messages using SMS API
Text Messaging API or SMS API can enable application to receive and send SMS text messages utilising txtimpact advanced SMS gateway API or Text Messaging API. TxtImpact provides simple HTTP interface for clients to send and receive messages from mobile phone users. HTTP POST can be used in all modern programming languages including ASP, ASP.NET, C++, C#, PHP, VB, VB.NET, command lines, SSH & cURL.
Benefits of using our SMS Text Messaging Gateway and Text Messaging Post API
  • Send SMS Text Messages Directly From Your Applications or Website Send texts to an individual or multiple recipients directly from your server.
  • Receive SMS Text Messages Directly To Your Server Whether you have a Short Code, Shared or Dedicated Inbound Number all inbound texts will be forwarded directly onto your server.
  • Easy and Immediate Implementation Implementation of the required code and integrating it with our system can all be done in less than 30 minutes.
  • No SMS/SMPP Gateway required to be installed on client site.
  • Sticky session; Once customer start using your server, stay in touch with them. Messages will be forwarded to your server even if keyword not included in message.
  • Supports Delivery Reports (Advance Developer API account
Send SMS Text Messages via SMS API | Receive Messages via SMS API
Sending SMS Text Messages using HTTP SMS API
HTTP URL Example: &vasid=VASID&FROM=SHORTCODE&to=MOBILENUMER&text=YOUR_MESSAGE HTTP METHOD: POST or GET HTTP Parameters *VERSION: 2.0 *USERID: *PASSWORD: *VASID: *FROM: *TO: DESTINATION MOBILE NUMBER. [(country code) + mobile number] e.g 17220001111 *TEXT: The Text Message (160 characters) DeliveryDateTime (optional) Optional Default: Date and time for message delivery in UTC format. Example: 07/14/1997 00:00:00;UTC date time The following represents Sunday, July 13, 1997 at 8:00:00 PM in New York City. ReplyPath**: Your server application web address to receive replies from users CASE BY case basis ONLY available in advance developer API. e.g http://[your_server]/smsreceiver?
After you submit the message request to txtimpact server, the server will return a response in following format: For successful submission: JOBID: [MOBILENUMBER]:[SMSID] Failed submission: ERR: 301: Failed authentication ERR: 305: Not enough credits
  • Values must be properly URL encoded
  • Message submitted longer than 160 characters will be rejected. For sending messages longer than 160 characters, contact sales.
  • You’ll be charged one credit for every 160 character message.
  • The list of allowed characters for messages and subjects is: a-z, A-Z, 0-9 and these special characters: .,:;!?()~=+-_\/@$#&%’”
  • For line break in a message, use \r\n; e.g Your class is schedule on \r\n july 24th @ 7:00PM.
  • The following characters count as two characters: ~, @, #, %, +, =, /, \, \r\n
SMS API usage example from PHP, ASP, & C#:
  $ch = curl_init(');
  curl_setopt($ch, CURLOPT_POST, 1);
  curl_setopt($ch, CURLOPT_POSTFIELDS,"VERSION=2.0&userid=[username]&password=[userpassword]&VASId=[VASId]&PROFILEID=[PROFILEID]&FROM=27126&TO=[Mobile Number]&Text=[Text Message]);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
  $data = curl_exec($ch);
  Print($data); /* result of SMS API call*/
  string ret=string.Empty;
  WebRequest w=WebRequest.Create("");
  using(Stream writeStream = w.GetRequestStream())
      UTF8Encoding encoding = new UTF8Encoding();
      byte[] bytes = encoding.GetBytes("VERSION=2.0&userid=[username]&password=[userpassword]&VASId=[VASId] & PROFILEID =[ PROFILEID ]& FROM =27126&TO=[Mobile Number]&Text=[Text Message]);
      writeStream.Write(bytes, 0, bytes.Length);
  using (HttpWebResponse r = (HttpWebResponse) w.GetResponse())
     using (Stream responseStream = r.GetResponseStream())
         using (StreamReader readStream = new StreamReader (responseStream, Encoding.UTF8))
            ret = readStream.ReadToEnd();18.            }
MessageBox.Show(ret); /* result of API call*/
sstrData = "To=" & [Mobile Number]
sstrData = sstrData + "&From=27126"
sstrData = sstrData + "&UserId=XXXXX"
SstrData = sstrData + "&Password=XXXXX"
SstrData = sstrData + "&vasid=XXXX"
SstrData = sstrData + "&networkid=44"
SstrData = sstrData + "&profileid=2"
SstrData = sstrData + "&Text=Demo Message"
Set myhttp=CreateObject ("Msxml2.XMLHTTP") ("POST", "", false)
Myhttp.setRequestHeader "Content-Type", "application/x-www-form-urlencoded"
Myhttp.send sstrData
Response.write myhttp.responsetext
Set myhttp = Nothing
Receive SMS or Text Messages from SMS API/ SMS gateway developer API:
How it works? Step 1: User sends a text message to an assigned shortcode. Step 2: Message received by TxtImpact server from carrier. Step 3: TxtImpact parses the message, and redirect to clients’ server based on short code, and prefix assigned. Requirements: Client should set a web service to receive messages from TxtImpact servers. TxtImpact will send a message to client server in the following format. When configured you can pickup values from our GET request in following way using PHP PHP:
$sender = $_REQUEST['MobileNumber'];
$content = $_REQUEST ['Message'];
$inNumber = $_REQUEST ['shortcode']; 
$Rcvd = $_REQUEST ['Rcvd'];
HTTP URL’s http://[client web service url]? MobileNumber=xxxxxxxx&Message=xxxxxxx&SMSINBOXID=388&shortcode=xxxx HTTP METHOD GET Parameters MobileNumber: User’s mobile number Message: Text Message sent by user Rcvd: Message received date & time SMSInboxid: Reference number for all incoming messages