Airwallex

const login = await fetch('https://api.airwallex.com/api/v1/authentication/login', {
  method: 'POST',
  headers: { 'x-client-id': clientId, 'x-api-key': apiKey },
});
const { token } = await login.json();

const created = await (await fetch('https://api.airwallex.com/api/v1/pa/payment_intents/create', {
  method: 'POST',
  headers: { Authorization: `Bearer ${token}`, 'Content-Type': 'application/json' },
  body: JSON.stringify({
    request_id: 'booking-2026-08-04-001',        // your external_action_reference (idempotency)
    amount: 42000,                               // minor units, matches proposed_action.payment
    currency: 'EUR',
    merchant_order_id: 'booking-2026-08-04-001', // findable after a lost response
    return_url: 'https://your-app.example/airwallex/return', // required when 3D Secure may trigger
    metadata: { external_action_reference: 'booking-2026-08-04-001' },
  }),
})).json();

const confirmed = await (await fetch(
  `https://api.airwallex.com/api/v1/pa/payment_intents/${created.id}/confirm`,
  {
    method: 'POST',
    headers: { Authorization: `Bearer ${token}`, 'Content-Type': 'application/json' },
    body: JSON.stringify({
      request_id: 'booking-2026-08-04-001.confirm',
      payment_method: {
        type: 'card',
        card: { number: '...', expiry_month: '...', expiry_year: '...', cvc: '...' },
      },
    }),
  },
)).json();
// confirmed.id is your provider_transaction_reference