A payment link is a URL that is an invoice: open it and the payment surface is there, amount and assets preconfigured, ready to pay and shareable anywhere a link goes. No site, no integration, no code.
Links are how payments ride communication channels: paste in a chat, QR on a counter, link in an email campaign. Each carries its own confirmation state, so the merchant sees which conversation became a payment.
U.CASH Pay-Now links carry any enabled rail, track their own payment state, and settle non-custodial; the receive platform gives every account a public, linkable payment page.
Every term behind the rails, the assets, and the settlement.