import Hercules from '@usehercules/sdk';

const client = new Hercules({
  apiVersion: '2025-12-09',
  apiKey: process.env['HERCULES_API_KEY'], // This is the default and can be omitted
});

const response = await client.beta.subscriptions.customers.billingPortal('customer_id');

console.log(response.url);

{
  "url": "<string>"
}