Monitor SSL certificate expiry with Google Sheets and multi-channel alert

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Important notice

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

1. Workflow Overview

SSL Expiry Alert System Who is this for? This workflow is ideal for administrators or IT professionals responsible for monitoring SSL certificates of multiple websites to ensure they do not expire ...

Best for

SecOps automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.googlesheets, n8n-nodes-base.scheduletrigger, n8n-nodes-base.httprequest, n8n-nodes-base.stickynote, n8n-nodes-base.switch, n8n-nodes-base.gmail, n8n-nodes-ntfy.ntfy, n8n-nodes-base.telegram

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Monitor SSL certificate expiry with Google Sheets and multi-channel alert
Workflow name: Monitor SSL certificate expiry with Google Sheets and multi-channel alert

SSL Expiry Alert System

Who is this for?

This workflow is ideal for administrators or IT professionals responsible for monitoring SSL certificates of multiple websites to ensure they do not expire unexpectedly.

Problem

SSL certificates play a crucial role in ensuring secure communication over the internet. However, if not monitored closely, they can expire, leading to potential security risks and service disruption. This workflow helps in proactively monitoring SSL certificate expiry dates.

Functionality

Pulls URLs to monitor from a Google Sheet.
Checks SSL certificates using SSL-Checker.io.
Updates Google Sheet with SSL details such as expiry date and certificate status.
Sends email alerts for SSL certificates nearing expiry (<30 days) or invalid certificates.

Setup

Clone the provided Google Sheet and update the Google Sheet URL in the "URLs to Monitor" node.
Set up Google Sheets and Gmail credentials in n8n.
Configure the Discourse Trigger for weekly monitoring.
Customize email/telegram/ntfy alert settings as needed.

Customization

Modify the frequency of monitoring by adjusting the trigger interval in the "Weekly Trigger" node.
Customize email content and recipients in the "Send Alert Email" node.
Extend functionality by adding additional checks or actions based on SSL certificate status.

Note

Ensure proper authentication and authorization for accessing Google Sheets, SSL-Checker.io, and Gmail accounts within the workflow.

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 - URLs to Monitor

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.5

Block 2 - Weekly Trigger

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

Block 3 - Fetch URLs

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.5

Block 4 - Check SSL

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

Block 5 - Sticky Note2

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

Block 6 - Sticky Note3

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

Block 7 - Sticky Note4

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

Block 8 - Sticky Note5

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

Block 9 - Switch

Type / Role: n8n-nodes-base.switch - switch
Config choices: Version 3.2

Block 10 - Send Alert Email2

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

Block 11 - Send Alert Email4

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

Block 12 - Send Alert Email6

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

Block 13 - Ntfy4

Type / Role: n8n-nodes-ntfy.Ntfy - Ntfy
Config choices: Version 1

Block 14 - Sticky Note10

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

Block 15 - Sticky Note11

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

Block 16 - Sticky Note8

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

Block 17 - Send Alert Email1

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

Block 18 - Sticky Note

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

Block 19 - Telegram

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

Block 20 - Sticky Note7

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

Block 21 - Sticky Note6

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

3. Summary Table

Workflow	Monitor SSL certificate expiry with Google Sheets and multi-channel alert
Complexity	advanced
Nodes	21
Categories	SecOps
Author	Jesse Davids
Published	09 Apr 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/3493/3493.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 SecOps workflows

Frequently asked questions

What does Monitor SSL certificate expiry with Google Sheets and multi-channel alert 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 SecOps use case.

Jesse Davids

2 workflows

Nodes

n8n-nodes-base.googlesheets n8n-nodes-base.scheduletrigger n8n-nodes-base.httprequest n8n-nodes-base.stickynote n8n-nodes-base.switch n8n-nodes-base.gmail n8n-nodes-ntfy.ntfy n8n-nodes-base.telegram

Complexity

advanced

Published 09 Apr 2025

Likes 0

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Install path: /data/workflows/3493/3493.json

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Monitor SSL certificate expiry with Google Sheets and multi-channel alert

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

SSL Expiry Alert System

Who is this for?

Problem

Functionality

Setup

Customization

Note

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - URLs to Monitor

Block 2 - Weekly Trigger

Block 3 - Fetch URLs

Block 4 - Check SSL

Block 5 - Sticky Note2

Block 6 - Sticky Note3

Block 7 - Sticky Note4

Block 8 - Sticky Note5

Block 9 - Switch

Block 10 - Send Alert Email2

Block 11 - Send Alert Email4

Block 12 - Send Alert Email6

Block 13 - Ntfy4

Block 14 - Sticky Note10

Block 15 - Sticky Note11

Block 16 - Sticky Note8

Block 17 - Send Alert Email1

Block 18 - Sticky Note

Block 19 - Telegram

Block 20 - Sticky Note7

Block 21 - Sticky Note6

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