curl --request POST \
  --url https://api.dexnotify.com/api/v1/sms/messages/estimate \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "content": "<string>",
  "to": [
    "<string>"
  ],
  "groupIds": [],
  "fileId": "<string>"
}
'

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({content: '<string>', to: ['<string>'], groupIds: [], fileId: '<string>'})
};

fetch('https://api.dexnotify.com/api/v1/sms/messages/estimate', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.dexnotify.com/api/v1/sms/messages/estimate"

payload = {
    "content": "<string>",
    "to": ["<string>"],
    "groupIds": [],
    "fileId": "<string>"
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.dexnotify.com/api/v1/sms/messages/estimate",
  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([
    'content' => '<string>',
    'to' => [
        '<string>'
    ],
    'groupIds' => [
        
    ],
    'fileId' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-key: <api-key>"
  ],
]);

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

curl_close($curl);

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