Already delivered.

curl -X POST https://app.huppmail.com/api/send \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "to": "recipient@example.com",
    "from": "you@yourdomain.com",
    "subject": "Hello from Huppmail",
    "html": "<h1>Welcome!</h1><p>Your email is on its way.</p>"
  }'

$response = file_get_contents('https://app.huppmail.com/api/send', false,
  stream_context_create([
    'http' => [
      'method'  => 'POST',
      'header'  => "Authorization: Bearer YOUR_API_KEY\r\n"
                   . "Content-Type: application/json\r\n",
      'content' => json_encode([
        'to'      => 'recipient@example.com',
        'from'    => 'you@yourdomain.com',
        'subject' => 'Hello from Huppmail',
        'html'    => '<h1>Welcome!</h1><p>Your email is on its way.</p>',
      ]),
    ],
  ])
);

const res = await fetch('https://app.huppmail.com/api/send', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    to: 'recipient@example.com',
    from: 'you@yourdomain.com',
    subject: 'Hello from Huppmail',
    html: '<h1>Welcome!</h1><p>Your email is on its way.</p>',
  }),
});

import requests

response = requests.post(
    'https://app.huppmail.com/api/send',
    headers={
        'Authorization': 'Bearer YOUR_API_KEY',
        'Content-Type': 'application/json',
    },
    json={
        'to': 'recipient@example.com',
        'from': 'you@yourdomain.com',
        'subject': 'Hello from Huppmail',
        'html': '<h1>Welcome!</h1><p>Your email is on its way.</p>',
    },
)

require 'net/http'
require 'json'

uri = URI('https://app.huppmail.com/api/send')
req = Net::HTTP::Post.new(uri, {
  'Authorization' => 'Bearer YOUR_API_KEY',
  'Content-Type'  => 'application/json',
})
req.body = {
  to:      'recipient@example.com',
  from:    'you@yourdomain.com',
  subject: 'Hello from Huppmail',
  html:    '<h1>Welcome!</h1><p>Your email is on its way.</p>',
}.to_json

res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(req) }

payload := strings.NewReader(`{
  "to":      "recipient@example.com",
  "from":    "you@yourdomain.com",
  "subject": "Hello from Huppmail",
  "html":    "<h1>Welcome!</h1><p>Your email is on its way.</p>"
}`)

req, _ := http.NewRequest("POST", "https://app.huppmail.com/api/send", payload)
req.Header.Set("Authorization", "Bearer YOUR_API_KEY")
req.Header.Set("Content-Type", "application/json")

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

let body = serde_json::json!({
    "to": "recipient@example.com",
    "from": "you@yourdomain.com",
    "subject": "Hello from Huppmail",
    "html": "<h1>Welcome!</h1><p>Your email is on its way.</p>",
});

let res = reqwest::Client::new()
    .post("https://app.huppmail.com/api/send")
    .header("Authorization", "Bearer YOUR_API_KEY")
    .json(&body)
    .send()
    .await?;

val res = khttp.post(
    url = "https://app.huppmail.com/api/send",
    headers = mapOf(
        "Authorization" to "Bearer YOUR_API_KEY",
        "Content-Type" to "application/json"
    ),
    json = mapOf(
        "to" to "recipient@example.com",
        "from" to "you@yourdomain.com",
        "subject" to "Hello from Huppmail",
        "html" to "<h1>Welcome!</h1><p>Your email is on its way.</p>"
    )
)