How to send targeted ecommerce emails with Klaviyo and Webflow Cloud

Effective Klaviyo automation for a Webflow Ecommerce store depends on separating browser-based product-view tracking from trusted server-side order processing: Klaviyo’s onsite script and template code record Viewed Product events for identified shoppers, while a Next.js application on Webflow Cloud validates signed Webflow order webhooks before sending Placed Order and Ordered Product events through Klaviyo’s API. The setup requires appropriate Webflow plans and API tokens, Klaviyo public and private keys, a Webflow Cloud-hosted Next.js project, and secure environment variables. The server route verifies webhook HMAC signatures against the raw request body, rejects stale requests to prevent replay attacks, converts currency values correctly, and uses unique event IDs so Webflow’s retries cannot create duplicate purchases. After deploying the route and creating the webhook through Webflow’s API, marketers can build browse-abandonment flows that suppress customers who later purchase and post-purchase flows tailored to ordered items, while applying consent filters where needed. Common issues include anonymous browsers not generating trackable views, unsigned dashboard-created webhooks, invalid secrets or Klaviyo credentials, retired API revisions, and unsupported Next.js edge-runtime declarations.

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