> ## Documentation Index > Fetch the complete documentation index at: https://docs.caibo.digital/llms.txt > Use this file to discover all available pages before exploring further. # How Embedded Checkout Works > Architecture and postMessage event flow of the Caibo embedded checkout SDK that renders the payment page inside your website without a full-page redirect. # Overview The Caibo embedded checkout is a drop-in JavaScript SDK that renders the Caibo payment page **inside** your website as an inline container or full-screen modal overlay — no full-page redirect required. The customer never leaves your site, and your servers never touch raw card data. ## Architecture The SDK creates an `