Order a VPS — or several identical ones in one invoice (paid from balance)

Provisions a VPS from the prepaid balance; if the balance is short, an unpaid invoice is returned (pay it with POST /invoices/{id}/pay). See GET /products for plan slugs and os_id values. quantity 2–50 creates one invoice and N separate services (each with its own renewal), created one after another after payment; check GET /orders/limits first. months 1–36 pays the term upfront: the invoice is the monthly price × months, payment moves the paid-until date by exactly that many months, then the server renews monthly from the balance; months 12 is the annual plan with its discount, other terms have no discount. Promo codes apply to single-server orders paid for 1 or 12 months only. An unpaid multi-server order reserves capacity for 24 hours, one per account.