We DeliverMessages that reach.

const response = await fetch(
  'https://api.zendsms.com/api/v1/send-sms',
  {
    method: 'POST',
    headers: {
      Authorization: `Bearer ${process.env.ZENDSMS_API_KEY}`,
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      recipient: '8801700000000',
      sender_id: 'ZENDSMS',
      message: 'Your order #1234 has shipped.',
      client_ref: 'order-1234'
    })
  }
);

const result = await response.json();

$response = $client->post(
  'https://api.zendsms.com/api/v1/send-sms',
  [
    'headers' => [
      'Authorization' => 'Bearer ' . getenv('ZENDSMS_API_KEY'),
      'Content-Type' => 'application/json',
    ],
    'json' => [
      'recipient' => '8801700000000',
      'sender_id' => 'ZENDSMS',
      'message' => 'Your order #1234 has shipped.',
      'client_ref' => 'order-1234',
    ],
  ]
);