curl --location 'https://api.megasmsug.com/sms/send' \
--header 'Authorization: Bearer <api_key>' \
--header 'Content-Type: application/json' \
--data '{
    "message": "This is test and \n this is a new line",
    "to": "+256200930346",
    "bypass_optout": true,
    "sender_id": "MegaSMS",
    "callback_url": "https://example.com/callback/handler"
}'

<?php

$curl = curl_init();

curl_setopt_array($curl, array(
    CURLOPT_URL => 'https://api.megasmsug.com/sms/send',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING => '',
    CURLOPT_MAXREDIRS => 10,
    CURLOPT_TIMEOUT => 0,
    CURLOPT_FOLLOWLOCATION => true,
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => 'POST',
    CURLOPT_POSTFIELDS =>'{
    "message": "This is test and \\n this is a new line",
    "to": "+256200930346",
    "bypass_optout": true,
    "sender_id": "MegaSMS",
    "callback_url": "https://example.com/callback/handler"
}',
    CURLOPT_HTTPHEADER => array(
    'Authorization: Bearer <api_key>',
    'Content-Type: application/json'
    ),
));

$response = curl_exec($curl);

curl_close($curl);
echo $response;

import http.client
import json

conn = http.client.HTTPSConnection("api.megasmsug.com")
payload = json.dumps({
    "message": "This is test and \n this is a new line",
    "to": "+256200930346",
    "bypass_optout": True,
    "sender_id": "MegaSMS",
    "callback_url": "https://example.com/callback/handler"
})
headers = {
    'Authorization': 'Bearer <api_key>',
    'Content-Type': 'application/json'
}
conn.request("POST", "/sms/send", payload, headers)
res = conn.getresponse()
data = res.read()
print(data.decode("utf-8"))

OkHttpClient client = new OkHttpClient().newBuilder()
    .build();
MediaType mediaType = MediaType.parse("application/json");
RequestBody body = RequestBody.create(mediaType, "{\r\n    \"message\": \"This is test and \\n this is a new line\",\r\n    \"to\": \"+256200930346\",\r\n    \"bypass_optout\": true,\r\n    \"sender_id\": \"MegaSMS\",\r\n    \"callback_url\": \"https://example.com/callback/handler\"\r\n}");
Request request = new Request.Builder()
    .url("https://api.megasmsug.com/sms/send")
    .method("POST", body)
    .addHeader("Authorization", "Bearer <api_key>")
    .addHeader("Content-Type", "application/json")
    .build();
Response response = client.newCall(request).execute();

var https = require('follow-redirects').https;
var fs = require('fs');

var options = {
    'method': 'POST',
    'hostname': 'api.megasmsug.com',
    'path': '/sms/send',
    'headers': {
    'Authorization': 'Bearer <api_key>',
    'Content-Type': 'application/json'
    },
    'maxRedirects': 20
};

var req = https.request(options, function (res) {
    var chunks = [];

    res.on("data", function (chunk) {
    chunks.push(chunk);
    });

    res.on("end", function (chunk) {
    var body = Buffer.concat(chunks);
    console.log(body.toString());
    });

    res.on("error", function (error) {
    console.error(error);
    });
});

var postData = JSON.stringify({
    "message": "This is test and \n this is a new line",
    "to": "+256200930346",
    "bypass_optout": true,
    "sender_id": "MegaSMS",
    "callback_url": "https://example.com/callback/handler"
});

req.write(postData);

req.end();

require "uri"
require "json"
require "net/http"

url = URI("https://api.megasmsug.com/sms/send")

https = Net::HTTP.new(url.host, url.port)
https.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = "Bearer <api_key>"
request["Content-Type"] = "application/json"
request.body = JSON.dump({
    "message": "This is test and \n this is a new line",
    "to": "+256200930346",
    "bypass_optout": true,
    "sender_id": "MegaSMS",
    "callback_url": "https://example.com/callback/handler"
})

response = https.request(request)
puts response.read_body

package main

import (
    "fmt"
    "strings"
    "net/http"
    "io/ioutil"
)

func main() {

    url := "https://api.megasmsug.com/sms/send"
    method := "POST"

    payload := strings.NewReader(`{`+"
"+`
    "message": "This is test and \n this is a new line",`+"
"+`
    "to": "+256200930346",`+"
"+`
    "bypass_optout": true,`+"
"+`
    "sender_id": "MegaSMS",`+"
"+`
    "callback_url": "https://example.com/callback/handler"`+"
"+`
}`)

    client := &http.Client {
    }
    req, err := http.NewRequest(method, url, payload)

    if err != nil {
    fmt.Println(err)
    return
    }
    req.Header.Add("Authorization", "Bearer <api_key>")
    req.Header.Add("Content-Type", "application/json")

    res, err := client.Do(req)
    if err != nil {
    fmt.Println(err)
    return
    }
    defer res.Body.Close()

    body, err := ioutil.ReadAll(res.Body)
    if err != nil {
    fmt.Println(err)
    return
    }
    fmt.Println(string(body))
}