Monitor Klaviyo list decay with Postgres logging and Gmail reports

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1. Workflow Overview

Klaviyo List Decay Detection Protect your sender reputation by automatically identifying and suppressing unengaged Klaviyo profiles every night. This workflow fetches your entire Klaviyo audience, ...

Best for

Market Research automation workflows
AI Summarization automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.scheduletrigger, n8n-nodes-base.set, n8n-nodes-base.httprequest, n8n-nodes-base.code, n8n-nodes-base.postgres, n8n-nodes-base.if, n8n-nodes-base.errortrigger

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Afeez.

Original n8n.io source

1.1 Workflow description

Title: Monitor Klaviyo list decay with Postgres logging and Gmail reports
Workflow name: Monitor Klaviyo list decay with Postgres logging and Gmail reports

Klaviyo List Decay Detection

Protect your sender reputation by automatically identifying and suppressing unengaged Klaviyo profiles every night.

This workflow fetches your entire Klaviyo audience, scores each profile based on days since last engagement, and classifies them into four decay tiers — Active, Moderate, High, and Critical. Profiles inactive for 90+ days are bulk-suppressed automatically via the Klaviyo API. A styled HTML report is emailed daily with a full tier breakdown, and all results are logged to Postgres for historical tracking. Any workflow failure is caught, logged, and alerted immediately.

What you get:

Nightly automated list health monitoring Four-tier decay scoring (0–100 engagement score per profile) Automatic bulk suppression of critical profiles in batches of 100 Daily HTML email report with tier counts and run metadata Full Postgres audit trail per profile and per run Error handling with instant email alerts on failure Requires: Klaviyo API key, Postgres database, Gmail OAuth2

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - 📉 List Decay Detection — Main

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 2 - ⚠️ Critical Setup

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 3 - Section — Setup & Profile Fetch

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 4 - Section — Score, Persist & Report

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 5 - Section — Critical Suppression Branch

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 6 - Section — Error Handling Branch

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 7 - Schedule: Daily 2AM

Type / Role: n8n-nodes-base.scheduleTrigger - scheduleTrigger
Config choices: Version 1.2

Block 8 - Set: Initialize Run

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 9 - Get All Profiles

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 10 - Extract Profile Items

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 11 - Score Profiles

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 12 - Log Profiles to DB

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2

Block 13 - Build Run Summary

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 14 - Insert Run Summary

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2

Block 15 - Build Email HTML

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 16 - Is Critical?

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.2

Block 17 - Suppress Critical in Batches

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 18 - Error Trigger

Type / Role: n8n-nodes-base.errorTrigger - errorTrigger
Config choices: Version 1

Block 19 - Prepare Error Data

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 20 - Log Error to DB

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2

Block 21 - Send Error Alert

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.1

Block 22 - Send a message

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.2

3. Summary Table

Workflow	Monitor Klaviyo list decay with Postgres logging and Gmail reports
Complexity	advanced
Nodes	22
Categories	Market Research, AI Summarization
Author	Afeez
Published	28 Apr 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/15359/15359.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Market Research workflows AI Summarization workflows

Frequently asked questions

What does Monitor Klaviyo list decay with Postgres logging and Gmail reports do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Market Research, AI Summarization use case.

Afeez

3 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.scheduletrigger n8n-nodes-base.set n8n-nodes-base.httprequest n8n-nodes-base.code n8n-nodes-base.postgres n8n-nodes-base.if n8n-nodes-base.errortrigger

Complexity

advanced

Published 28 Apr 2026

Likes 0

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Install path: /data/workflows/15359/15359.json

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Monitor Klaviyo list decay with Postgres logging and Gmail reports

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - 📉 List Decay Detection — Main

Block 2 - ⚠️ Critical Setup

Block 3 - Section — Setup & Profile Fetch

Block 4 - Section — Score, Persist & Report

Block 5 - Section — Critical Suppression Branch

Block 6 - Section — Error Handling Branch

Block 7 - Schedule: Daily 2AM

Block 8 - Set: Initialize Run

Block 9 - Get All Profiles

Block 10 - Extract Profile Items

Block 11 - Score Profiles

Block 12 - Log Profiles to DB

Block 13 - Build Run Summary

Block 14 - Insert Run Summary

Block 15 - Build Email HTML

Block 16 - Is Critical?

Block 17 - Suppress Critical in Batches

Block 18 - Error Trigger

Block 19 - Prepare Error Data

Block 20 - Log Error to DB

Block 21 - Send Error Alert

Block 22 - Send a message

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions