import CheckoutIntents from 'checkout-intents';

const client = new CheckoutIntents({
  apiKey: process.env['CHECKOUT_INTENTS_API_KEY'], // This is the default and can be omitted
});

const checkoutSession = await client.betas.checkoutSessions.create({
  productUrl: 'https://www.amazon.com/dp/B0DFC9MT8Q',
  quantity: 1,
});

console.log(checkoutSession.url);

{
  "url": "<string>"
}