Optimize Klaviyo campaign send times and email reports with Gmail

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1. Workflow Overview

How it works Every Monday at 8 AM, the workflow pulls all sent email campaigns from Klaviyo for the past 90 days It fetches open rate and click rate for each campaign, then groups results by audien...

Best for

Social Media 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.gmail, 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: Optimize Klaviyo campaign send times and email reports with Gmail
Workflow name: Optimize Klaviyo campaign send times and email reports with Gmail

How it works

Every Monday at 8 AM, the workflow pulls all sent email campaigns from Klaviyo for the past 90 days It fetches open rate and click rate for each campaign, then groups results by audience segment and send hour Time slots with at least 3 campaigns are ranked by average open rate A formatted HTML report is emailed showing your best-performing send times, broken down per audience — with medal icons for the top 3 slots

Set up steps

Add your Klaviyo API key to the Header Auth credential — takes about 2 minutes Connect your Gmail account to the two Gmail nodes (report delivery + error alerts) In both Gmail nodes, update the Send To field to your preferred email address (Optional) Open the Config node to adjust the lookback window (default: 90 days) or the minimum campaigns-per-slot threshold (default: 3) Activate the workflow — it will run automatically every Monday, or trigger it manually anytime from the canvas

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 - 📊 Send-Time Optimizer — 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 & Klaviyo Data Pull

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

Block 4 - Section — Analysis & Report Delivery

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

Block 5 - Schedule — Weekly Monday

Type / Role: n8n-nodes-base.scheduleTrigger - scheduleTrigger
Config choices: Version 1.1

Block 6 - Config

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

Block 7 - Get Sent Campaigns

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

Block 8 - Flatten Campaigns

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

Block 9 - Fetch Lists

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

Block 10 - Get Campaign Stats

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

Block 11 - Aggregate by Hour

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

Block 12 - Format Email Report

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

Block 13 - Gmail — Send Report

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

Block 14 - Gmail — Error Alert

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

Block 15 - Error Trigger

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

Block 16 - Section — Error Handling Branch

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

3. Summary Table

Workflow	Optimize Klaviyo campaign send times and email reports with Gmail
Complexity	advanced
Nodes	16
Categories	Social Media, AI Summarization
Author	Afeez
Published	08 May 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/15552/15552.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 Social Media workflows AI Summarization workflows

Frequently asked questions

What does Optimize Klaviyo campaign send times and email reports with Gmail 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 Social Media, 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.gmail n8n-nodes-base.errortrigger

Complexity

advanced

Published 08 May 2026

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/15552/15552.json

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Optimize Klaviyo campaign send times and email reports with Gmail

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 - 📊 Send-Time Optimizer — Main

Block 2 - ⚠️ Critical Setup

Block 3 - Section — Setup & Klaviyo Data Pull

Block 4 - Section — Analysis & Report Delivery

Block 5 - Schedule — Weekly Monday

Block 6 - Config

Block 7 - Get Sent Campaigns

Block 8 - Flatten Campaigns

Block 9 - Fetch Lists

Block 10 - Get Campaign Stats

Block 11 - Aggregate by Hour

Block 12 - Format Email Report

Block 13 - Gmail — Send Report

Block 14 - Gmail — Error Alert

Block 15 - Error Trigger

Block 16 - Section — Error Handling Branch

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