Smart Links
On sndx.in

// Create a smart link — POST /v1/exalink/links
const res = await fetch(
  'https://api.sendexa.co/v1/exalink/links',
  {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      Authorization:
        'Basic ' + process.env.SENDEXA_API_TOKEN,
    },
    body: JSON.stringify({
      destination:
        'https://shop.example.com/summer-sale',
      slug: 'summer26',
      title: 'Summer Sale 2026',
      utm: {
        source: 'sms',
        medium: 'campaign',
        campaign: 'summer_sale_2026',
      },
      expiresAt: '2026-09-30T23:59:59.000Z',
      maxClicks: 10000,
    }),
  }
);

const { data } = await res.json();
// data.shortUrl → https://sndx.in/summer26
console.log(data.shortUrl);