Shows what Xyla would post for an online store, with no Xyla account. Give it the store's web address (Shopify or WooCommerce). Xyla reads the store's brand (logo, colours, niche) and makes 3 sample social media posts from the store's own product photos, with captions. Returns a preview token at once; the posts take about 3 minutes and the card shows them as they finish. A store previewed in the last 7 days gets its earlier samples back. When no card is shown, call preview_status with the token to follow it. A store that already uses Xyla gets a sign-in link instead.