curl --request POST \
  --url https://api.example.com/v1/Accounts/{account_sid}/VoipCarriers \
  --header 'Content-Type: application/json' \
  --data '
{
  "application_sid": null,
  "diversion": null,
  "e164_leading_plus": 1,
  "is_active": 1,
  "name": "my carrier",
  "register_password": null,
  "register_sip_realm": null,
  "register_username": null,
  "requires_register": 0,
  "tech_prefix": null
}
'

import requests

url = "https://api.example.com/v1/Accounts/{account_sid}/VoipCarriers"

payload = {
    "application_sid": None,
    "diversion": None,
    "e164_leading_plus": 1,
    "is_active": 1,
    "name": "my carrier",
    "register_password": None,
    "register_sip_realm": None,
    "register_username": None,
    "requires_register": 0,
    "tech_prefix": None
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    application_sid: null,
    diversion: null,
    e164_leading_plus: 1,
    is_active: 1,
    name: 'my carrier',
    register_password: null,
    register_sip_realm: null,
    register_username: null,
    requires_register: 0,
    tech_prefix: null
  })
};

fetch('https://api.example.com/v1/Accounts/{account_sid}/VoipCarriers', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.example.com/v1/Accounts/{account_sid}/VoipCarriers",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'application_sid' => null,
    'diversion' => null,
    'e164_leading_plus' => 1,
    'is_active' => 1,
    'name' => 'my carrier',
    'register_password' => null,
    'register_sip_realm' => null,
    'register_username' => null,
    'requires_register' => 0,
    'tech_prefix' => null
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://api.example.com/v1/Accounts/{account_sid}/VoipCarriers"

	payload := strings.NewReader("{\n  \"application_sid\": null,\n  \"diversion\": null,\n  \"e164_leading_plus\": 1,\n  \"is_active\": 1,\n  \"name\": \"my carrier\",\n  \"register_password\": null,\n  \"register_sip_realm\": null,\n  \"register_username\": null,\n  \"requires_register\": 0,\n  \"tech_prefix\": null\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.example.com/v1/Accounts/{account_sid}/VoipCarriers")
  .header("Content-Type", "application/json")
  .body("{\n  \"application_sid\": null,\n  \"diversion\": null,\n  \"e164_leading_plus\": 1,\n  \"is_active\": 1,\n  \"name\": \"my carrier\",\n  \"register_password\": null,\n  \"register_sip_realm\": null,\n  \"register_username\": null,\n  \"requires_register\": 0,\n  \"tech_prefix\": null\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/v1/Accounts/{account_sid}/VoipCarriers")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"application_sid\": null,\n  \"diversion\": null,\n  \"e164_leading_plus\": 1,\n  \"is_active\": 1,\n  \"name\": \"my carrier\",\n  \"register_password\": null,\n  \"register_sip_realm\": null,\n  \"register_username\": null,\n  \"requires_register\": 0,\n  \"tech_prefix\": null\n}"

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

{
  "sid": "3eff2e0b-9870-4cc0-aa96-363e703c37ab"
}