How does this skill handle duplicate events?

The skill includes implementation patterns for idempotency using Redis to track unique Klaviyo event IDs, ensuring that each notification is processed exactly once even if Klaviyo retries the delivery.

Which Klaviyo event topics are supported?

It supports the full range of Klaviyo topics including profile creations/updates, list and segment membership changes, and campaign or flow execution events.

Can I manage webhooks programmatically with this skill?

Yes, it provides tools and code snippets for creating, listing, and deleting webhook subscriptions via the Klaviyo Webhooks API, allowing for automated environment setup.

Why is raw body parsing necessary for Klaviyo webhooks?

Klaviyo uses HMAC-SHA256 signatures which require the exact, unparsed request body to verify the sender's identity. Using a standard JSON parser before verification will cause the signature check to fail.

Klaviyo Webhooks & Event Handling

Name: Klaviyo Webhooks & Event Handling
Author: jeremylongshore

byjeremylongshore

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2,024

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Marketing Automation

Implements secure Klaviyo webhook endpoints with signature verification, automated event routing, and idempotency handling.

This skill streamlines the development of event-driven integrations with Klaviyo by providing standardized patterns for secure webhook management. It automates the setup of HTTPS endpoints, implements robust HMAC-SHA256 signature verification to prevent spoofing, and includes best-practice logic for event routing and idempotency using Redis. Whether you are syncing user profiles, tracking campaign performance, or responding to list changes, this skill ensures your Klaviyo integration is secure, reliable, and production-ready.

Key Features

012,024 GitHub stars

02Express.js middleware templates optimized for raw body parsing

03Idempotency handling with Redis to prevent duplicate event processing

04Automated event routing for profile, list, segment, and campaign updates

05HMAC-SHA256 signature verification for secure webhook communication

06Programmatic webhook creation and management via Klaviyo Webhooks API

Use Cases

01Syncing Klaviyo profile updates to a local database in real-time

02Monitoring campaign delivery and engagement metrics for external analytics dashboards

03Triggering custom application workflows when a user joins or leaves a mailing list

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jeremylongshore/claude-code-plugins-plus-skills klaviyo-webhooks-events

For use in Claude.ai and ChatGPT

Key Features

012,024 GitHub stars

02Express.js middleware templates optimized for raw body parsing

03Idempotency handling with Redis to prevent duplicate event processing

04Automated event routing for profile, list, segment, and campaign updates

05HMAC-SHA256 signature verification for secure webhook communication

06Programmatic webhook creation and management via Klaviyo Webhooks API

Use Cases

01Syncing Klaviyo profile updates to a local database in real-time

02Monitoring campaign delivery and engagement metrics for external analytics dashboards

03Triggering custom application workflows when a user joins or leaves a mailing list

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jeremylongshore/claude-code-plugins-plus-skills klaviyo-webhooks-events

For use in Claude.ai and ChatGPT