Klaviyo Campaign Link Checker with Claude, Google Sheets & Slack

Prevent broken Klaviyo campaigns with an automated link + offer checker (Klaviyo, Claude, Google Sheets & Slack)

This n8n workflow reviews upcoming Klaviyo scheduled emails every hour, tests campaign links and images for errors, validates discount codes and deadlines using Anthropic Claude, and posts clear pass/warn/fail results to Slack—while logging every check back to Google Sheets.

What this workflow does

• Runs hourly to verify required configuration values are set (Google Sheets URL/tabs, Slack channel ID, time zone, and limits).
• Loads promo rules from the Google Sheets “Offers” and “Checks” tabs to know which codes/discount windows are valid and which email versions were already checked.
• Fetches Klaviyo campaign messages (scheduled by default, and drafts if enabled), then selects A/B variants and limits results to emails sending within a configurable time window.
• Extracts content from each Klaviyo template, including plain-text, codes/offers/dates, and up to the configured number of non-personalized links and images. Unchanged versions are skipped unless a near-send reminder is due.
• Performs automated validation by sending HEAD requests to each extracted URL to flag dead destinations and note sites that block automated checks.
• Uses Anthropic Claude to identify discount codes, offers, and dates from the email text, then validates them against the offers sheet and the email send date.
• Reports to Slack with per-email status (pass/warn/fail) and reminders when applicable, and appends a detailed log row back to Google Sheets.

Use cases

• Reduce last-minute revenue loss from broken links in Klaviyo campaigns.
• Verify that promo codes and discount deadlines match your Google Sheets offers list.
• Operationally track A/B variants and ensure the right content is live before send time.

Technical details

• n8n nodes include: if, set, code, Slack, HTTP Request, and Sticky Note.
• Integrations: Klaviyo, Google Sheets, Slack, and Anthropic Claude.
• Runs hourly, validates configuration, checks links via HEAD requests, and logs results to Google Sheets.