Guide to Whatsflow API.

curl --request POST "${BASE_URL}/message/sendText/${INSTANCE}" \
  --header "apikey: ${API_KEY}" \
  --header "Content-Type: application/json" \
  --data '{
    "number": "201000000000",
    "text": "Hi Ahmed, your order #1042 is confirmed. Thank you for choosing us!",
    "linkPreview": false
}'

// Node.js 18+ · server-side
const baseUrl = process.env.BASE_URL.replace(/\/$/, "");
const instance = encodeURIComponent(process.env.INSTANCE);

const response = await fetch(`${baseUrl}/message/sendText/${instance}`, {
  method: "POST",
  headers: {
    apikey: process.env.API_KEY,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    number: "201000000000",
    text: "Hi Ahmed, your order #1042 is confirmed.",
    linkPreview: false
  })
});

if (!response.ok) {
  throw new Error(`Request failed: ${response.status}`);
}
const message = await response.json();
console.log(message.key.id);

use Illuminate\Support\Facades\Http;

// Read credentials from your server configuration.
$baseUrl = rtrim(config('services.whatsflow.url'), '/');
$instance = rawurlencode(config('services.whatsflow.instance'));

$message = Http::withHeaders([
    'apikey' => config('services.whatsflow.key'),
])->timeout(30)->post(
    "{$baseUrl}/message/sendText/{$instance}",
    [
        'number' => '201000000000',
        'text' => 'Hi Ahmed, your order #1042 is confirmed.',
        'linkPreview' => false,
    ]
)->throw()->json();

$messageId = $message['key']['id'];