Build fax into any application.

# Send a fax — multipart/form-data
curl --location 'https://api2.westfax.com/REST/Fax_SendFax/json' \
  --header 'Content-Type: multipart/form-data' \
  --form 'Username="your_username"' \
  --form 'Password="your_password"' \
  --form 'ProductId="22222222-1111-0000-0000-000000000"' \
  --form 'Numbers1="9702895979"' \
  --form 'Files0=@"/path/to/document.pdf"'

# Send a fax with the requests library
import requests

url = 'https://api2.westfax.com/REST/Fax_SendFax/json'
data = {
    'Username':  'your_username',
    'Password':  'your_password',
    'ProductId': '22222222-1111-0000-0000-000000000',
    'Numbers1':  '9702895979',
}
files = {'Files0': open('document.pdf', 'rb')}

res = requests.post(url, data=data, files=files)
print(res.text)

<?php  // Send a fax with cURL
$ch = curl_init('https://api2.westfax.com/REST/Fax_SendFax/json');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, [
    'Username'  => 'your_username',
    'Password'  => 'your_password',
    'ProductId' => '22222222-1111-0000-0000-000000000',
    'Numbers1'  => '9702895979',
    'Files0'    => new CURLFile('document.pdf'),
]);
echo curl_exec($ch);

// Send a fax over HTTPS
package main

import ("fmt"; "net/http"; "net/url")

func main() {
    form := url.Values{
        "Username":  {"your_username"},
        "Password":  {"your_password"},
        "ProductId": {"22222222-1111-0000-0000-000000000"},
        "Numbers1":  {"9702895979"},
    }
    res, _ := http.PostForm(
        "https://api2.westfax.com/REST/Fax_SendFax/json", form)
    fmt.Println(res.Status)
}

// Send a fax with HttpClient
using var client = new HttpClient();
using var form = new MultipartFormDataContent {
    { new StringContent("your_username"), "Username" },
    { new StringContent("your_password"), "Password" },
    { new StringContent("22222222-1111-0000-0000-000000000"), "ProductId" },
    { new StringContent("9702895979"), "Numbers1" },
    { new ByteArrayContent(File.ReadAllBytes("document.pdf")), "Files0", "doc.pdf" },
};
var res = await client.PostAsync(
    "https://api2.westfax.com/REST/Fax_SendFax/json", form);
Console.WriteLine(await res.Content.ReadAsStringAsync());