Monitor core web vitals with Lighthouse, Gemini AI, Telegram alerts & Google Sheets

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

Automate Lighthouse report alerts to messenger and Google Sheets Who’s it for This workflow is ideal for developers, SEO specialists, performance engineers, and digital agencies who want to continu...

Best for

DevOps automation workflows
AI Summarization automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.scheduletrigger, @n8n/n8n-nodes-langchain.lmchatgooglegemini, n8n-nodes-base.if, n8n-nodes-base.telegram, n8n-nodes-base.httprequest, n8n-nodes-base.code, n8n-nodes-base.stickynote, @n8n/n8n-nodes-langchain.chainsummarization

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Monitor core web vitals with Lighthouse, Gemini AI, Telegram alerts & Google Sheets
Workflow name: Monitor core web vitals with Lighthouse, Gemini AI, Telegram alerts & Google Sheets

Automate Lighthouse report alerts to messenger and Google Sheets

Who’s it for

This workflow is ideal for developers, SEO specialists, performance engineers, and digital agencies who want to continuously monitor website performance using Core Web Vitals. It’s also perfect for product or infrastructure teams that need real-time alerts when a site underperforms and want a historical log of reports in Google Sheets.

What it does

This automation periodically fetches a Lighthouse report from the PageSpeed Insights API, checks whether any of the Core Web Vitals (CWV) scores fall below a defined threshold, and sends a notification to Telegram (or any other preferred messenger). It also logs the summarized report in a specific row within a Google Spreadsheet for long-term tracking and reporting.

The CWV audit results are processed using JavaScript and passed through a summarization step using Gemini Chat, making the audit descriptions concise and actionable.

How to set up

Configure the Schedule Trigger node to run at your preferred frequency.
Set your target URLs and API Key, then connect the HTTP Request node to Google PageSpeed Insights.
Update the JavaScript Code node to filter and parse only CWV metrics.
Define thresholds in the IF Node to trigger Telegram messages only when needed.
Connect your Telegram (or other messenger) credentials.
Set up the Google Sheets node by linking your account and choosing the sheet and range to log data.

Requirements

Google account with access to Google Sheets
Telegram bot token or any preferred messenger
API key for PageSpeed Insights
Gemini Chat integration (optional for summarization, can be replaced or removed)

How to customize the workflow

Swap Telegram for Slack, Discord, or email by replacing the Send Notification node.

Adjust the CWV thresholds or include other Lighthouse metrics by modifying the IF Node and JavaScript logic.

Add multiple URLs to monitor by introducing a loop or extending the schedule with different endpoints.

Replace the Gemini Chat model with OpenAI, Claude, or your custom summarizer if needed.

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 - Schedule Trigger

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

Block 2 - Google Gemini Chat Model

Type / Role: @n8n/n8n-nodes-langchain.lmChatGoogleGemini - lmChatGoogleGemini
Config choices: Version 1

Block 3 - If

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

Block 4 - Send Notification

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

Block 5 - call page speed insights

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

Block 6 - processing data cwv and audits

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

Block 7 - Sticky Note

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

Block 8 - Sticky Note1

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

Block 9 - Sticky Note2

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

Block 10 - summarize audit description

Type / Role: @n8n/n8n-nodes-langchain.chainSummarization - chainSummarization
Config choices: Version 2.1

Block 11 - Sticky Note3

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

Block 12 - Sticky Note4

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

Block 13 - Append row in specific sheet

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.6

3. Summary Table

Workflow	Monitor core web vitals with Lighthouse, Gemini AI, Telegram alerts & Google Sheets
Complexity	intermediate
Nodes	13
Categories	DevOps, AI Summarization
Author	Rully Saputra
Published	26 Jul 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/6490/6490.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 DevOps workflows AI Summarization workflows

Frequently asked questions

What does Monitor core web vitals with Lighthouse, Gemini AI, Telegram alerts & Google Sheets 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 DevOps, AI Summarization use case.

Rully Saputra

12 workflows

Nodes

n8n-nodes-base.scheduletrigger @n8n/n8n-nodes-langchain.lmchatgooglegemini n8n-nodes-base.if n8n-nodes-base.telegram n8n-nodes-base.httprequest n8n-nodes-base.code n8n-nodes-base.stickynote @n8n/n8n-nodes-langchain.chainsummarization

Complexity

intermediate

Published 26 Jul 2025

Likes 0

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Install path: /data/workflows/6490/6490.json

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Monitor core web vitals with Lighthouse, Gemini AI, Telegram alerts & Google Sheets

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Automate Lighthouse report alerts to messenger and Google Sheets

Who’s it for

What it does

How to set up

Requirements

How to customize the workflow

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Schedule Trigger

Block 2 - Google Gemini Chat Model

Block 3 - If

Block 4 - Send Notification

Block 5 - call page speed insights

Block 6 - processing data cwv and audits

Block 7 - Sticky Note

Block 8 - Sticky Note1

Block 9 - Sticky Note2

Block 10 - summarize audit description

Block 11 - Sticky Note3

Block 12 - Sticky Note4

Block 13 - Append row in specific sheet

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