SendMessage

// https://messaging.esendex.us/Messaging.svc?wsdl was added as a Service Reference and given the name WSDL

using WSDL;

var client = new MessagingClient(MessagingClient.EndpointConfiguration.mms2wsHttpBindingSecure);

var request = new OutgoingMessageRequest
{
    Attachments = new[] { "https://esendex.us/img/docs/example.jpg" },
    Body = "Hi, this message was sent using C#.",
    From = YOUR_FROM_NUMBER,
    LicenseKey = YOUR_LICENSE_KEY,
    ScheduledDateTime = DateTime.UtcNow.AddMinutes(1),
    To = new[] { YOUR_TO_NUMBER },
    UseMMS = true
};

var messages = await client.SendMessageAsync(request);

foreach (var m in messages)
{
    Console.WriteLine(
        "Message ID: " + m.MessageID + Environment.NewLine +
        "Message Status: " + m.MessageStatus + Environment.NewLine +
        "To: " + m.To + Environment.NewLine +
        "From: " + m.From + Environment.NewLine +
        "UTC Time Sent: " + m.SentTime + Environment.NewLine +
        "Attachments: " + m.Attachments + Environment.NewLine);
}

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.time.Instant;

public final class App {
    public static void main(String[] args) throws Exception {
        var url = new URL("https://messaging.esendex.us/Messaging.svc/SendMessage");
        var con = (HttpURLConnection) url.openConnection();
        con.setRequestMethod("POST");
        con.setRequestProperty("Content-Type", "application/json");
        con.setRequestProperty("Accept", "application/json");
        con.setDoInput(true);
        con.setDoOutput(true);

        var scheduledMilli = Instant.now().plusSeconds(60).toEpochMilli();
        var scheduledDateTime = String.format("\\/Date(%s)\\/", scheduledMilli);
        var json = """
                {
                    "Attachments": [ "https://esendex.us/img/docs/example.jpg" ],
                    "Body": "Hi, this message was sent using Java.",
                    "LicenseKey": "00000000-0000-0000-0000-000000000000",
                    "From": "54321",
                    "To": [ "7575559999" ],
                    "ScheduledDateTime": "%s",
                    "UseMMS": true
                }
                """.formatted(scheduledDateTime);

        try (var os = con.getOutputStream()) {
            var input = json.getBytes("utf-8");
            os.write(input, 0, input.length);
        }

        var response = new StringBuilder();
        String responseLine = null;

        if (con.getResponseCode() == 200) {
            try (var br = new BufferedReader(
                    new InputStreamReader(con.getInputStream(), "utf-8"))) {
                while ((responseLine = br.readLine()) != null) {
                    response.append(responseLine.trim());
                }
            }
        } else {
            try (var br = new BufferedReader(
                    new InputStreamReader(con.getErrorStream(), "utf-8"))) {
                while ((responseLine = br.readLine()) != null) {
                    response.append(responseLine.trim());
                }
            }
        }

        System.out.println(response.toString());
    }
}

<?php

$json = '{
  "Attachments":["https://picsum.photos/id/0/100"],
  "Body":"",
  "Concatenate":false,
  "From":"7575550000",
  "IsUnicode":false,
  "LicenseKey":"00000000-0000-0000-0000-000000000000",
  "PostbackUrl":"http://esendex.us/postback.aspx",
  "ReferenceID":"",
  "ScheduledDateTime":"\/Date(1239018869048)\/",
  "Subject":"",
  "To":["15553096094"],
  "UseMMS":true
}';

$url = 'https://messaging.esendex.us/Messaging.svc/SendMessage';
$cURL = curl_init();

curl_setopt($cURL, CURLOPT_URL, $url);
curl_setopt($cURL, CURLOPT_POST, true);
curl_setopt($cURL, CURLOPT_POSTFIELDS, $json);
curl_setopt($cURL, CURLOPT_RETURNTRANSFER, true);

curl_setopt($cURL, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Accept: application/json'));
// If you desire your results in XML format, use the following line for your HTTP headers and comment out the HTTP headers code line above.
// curl_setopt($cURL, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));

$result = curl_exec($cURL);
curl_close($cURL);
$array = json_decode($result, true);

// print_r($json);
// print_r("\n\n\n\n");
print_r($array);

?>

from datetime import datetime, timedelta
import httpx

headers = {"Accept": "application/json"}
url = "https://messaging.esendex.us/Messaging.svc/SendMessage"

dt = datetime.utcnow() + timedelta(minutes=1)
ms = round(dt.timestamp() * 1000)
scheduled_date_time = f"/Date({ms})/"

request = {
    "Attachments": ["https://esendex.us/img/docs/example.jpg"],
    "Body": "Hi, this message was sent using Python.",
    "From": "7575550000",
    "LicenseKey": "00000000-0000-0000-0000-000000000000",
    "ScheduledDateTime": scheduled_date_time,
    "To": ["7575559999"],
    "UseMMS": True,
}

with httpx.Client(headers=headers) as client:
    response = client.post(url=url, json=request)

response.raise_for_status()

print(response.json())

require 'date_core'
require 'json'
require 'net/http'

headers = { Accept: 'application/json', 'Content-Type': 'application/json' }
uri = URI('https://messaging.esendex.us/Messaging.svc/SendMessage')

# Let's send one minute from now.
dt = Time.now + 60
ms = dt.to_i * 1000
scheduled_date_time = "\/Date(#{ms})\/"

data = {
  'Attachments': ['https://esendex.us/img/docs/example.jpg'],
  'Body': 'Hi, this message was sent using Ruby.',
  'From': '7575550000',
  'LicenseKey': '00000000-0000-0000-0000-000000000000',
  'ScheduledDateTime': scheduled_date_time,
  'To': ['7575559999'],
  'UseMMS': true
}.to_json

response = Net::HTTP.post(uri, data, headers)
raise response.message if response.is_a?(Net::HTTPClientError) || response.is_a?(Net::HTTPServerError)

puts JSON.parse(response.body)

{
	"Attachments": [
		"String content"
	],
	"Body": "String content",
	"Concatenate": true,
	"From": "String content",
	"IsUnicode": true,
	"LicenseKey": "1627aea5-8e0a-4371-9022-9b504344e724",
	"PostbackUrl": "String content",
	"ReferenceID": "String content",
	"ScheduledDateTime": "\/Date(928164000000-0400)\/",
	"Subject": "String content",
	"To": [
		"String content"
	],
	"UseMMS": true
}

[
	{
		"Attachments": "String content",
		"From": "String content",
		"MessageID": "1627aea5-8e0a-4371-9022-9b504344e724",
		"MessageStatus": 0,
		"SentTime": "\/Date(928164000000-0400)\/",
		"To": "String content"
	}
]

<OutgoingMessageRequest xmlns="http://sms2.cdyne.com">
  <Attachments>
    <string xmlns="http://schemas.microsoft.com/2003/10/Serialization/Arrays">String content</string>
    <string xmlns="http://schemas.microsoft.com/2003/10/Serialization/Arrays">String content</string>
  </Attachments>
  <Body>String content</Body>
  <Concatenate>true</Concatenate>
  <From>String content</From>
  <IsUnicode>true</IsUnicode>
  <LicenseKey>1627aea5-8e0a-4371-9022-9b504344e724</LicenseKey>
  <PostbackUrl>String content</PostbackUrl>
  <ReferenceID>String content</ReferenceID>
  <ScheduledDateTime>1999-05-31T11:20:00</ScheduledDateTime>
  <Subject>String content</Subject>
  <To>
    <string xmlns="http://schemas.microsoft.com/2003/10/Serialization/Arrays">String content</string>
    <string xmlns="http://schemas.microsoft.com/2003/10/Serialization/Arrays">String content</string>
  </To>
  <UseMMS>true</UseMMS>
</OutgoingMessageRequest>

<ArrayOfOutgoingMessageResponse xmlns="http://sms2.cdyne.com">
  <OutgoingMessageResponse>
    <Attachments>String content</Attachments>
    <From>String content</From>
    <MessageID>1627aea5-8e0a-4371-9022-9b504344e724</MessageID>
    <MessageStatus>Hold</MessageStatus>
    <SentTime>1999-05-31T11:20:00</SentTime>
    <To>String content</To>
  </OutgoingMessageResponse>
  <OutgoingMessageResponse>
    <Attachments>String content</Attachments>
    <From>String content</From>
    <MessageID>1627aea5-8e0a-4371-9022-9b504344e724</MessageID>
    <MessageStatus>Hold</MessageStatus>
    <SentTime>1999-05-31T11:20:00</SentTime>
    <To>String content</To>
  </OutgoingMessageResponse>
</ArrayOfOutgoingMessageResponse>