Email from your app that gets delivered.

const res = await fetch('https://host.ulewicz.space/api/email/v1/send', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer hbe_your_key',
    'Content-Type': 'application/json',
    'Idempotency-Key': 'order-10492',
  },
  body: JSON.stringify({
    from: 'Shop <orders@mail.yourcompany.com>',
    to: 'customer@example.com',
    template: 'order-confirmation',
    variables: { order_id: '10492', total: '249.00' },
  }),
})
// 202 { id: 'em_…', status: 'queued' }