Monitor SSL certificate expiry with Google Sheets and email alerts

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Important notice

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

1. Workflow Overview

SSL Certificate Monitoring & Expiry Alert with Spreadsheet [FREE APIs] What This Workflow Does This n8n template automatically monitors SSL certificates of websites listed in a Google Sheet an...

Best for

SecOps automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.httprequest, n8n-nodes-base.splitinbatches, n8n-nodes-base.googlesheets, n8n-nodes-base.scheduletrigger, n8n-nodes-base.if, n8n-nodes-base.code, n8n-nodes-base.stickynote, n8n-nodes-base.emailsend

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Monitor SSL certificate expiry with Google Sheets and email alerts
Workflow name: Monitor SSL certificate expiry with Google Sheets and email alerts

🔒 SSL Certificate Monitoring & Expiry Alert with Spreadsheet [FREE APIs]

✅ What This Workflow Does

This n8n template automatically monitors SSL certificates of websites listed in a Google Sheet and sends email alerts if any are expiring within 14 days. It helps ensure you avoid downtime, security issues, and trust warnings due to expired certificates.

🧩 Key Features

📅 Weekly Automation: Runs every Monday at 7:00 AM (configurable).
📄 Google Sheets Integration: Fetches and updates data in a spreadsheet.
🔍 SSL Check via API: Uses ssl-checker.io to get certificate details.
⚠️ SSL Expiry Filter: Identifies certificates expiring within 14 days.
📧 Email Alerts: Sends notifications for certificates close to expiration.

📂 Input Spreadsheet Format

Your Google Sheet should have the following columns:

No	Name	Link	SSL Issued On	SSL Expired On	SSL Status
1	Example Site	https://example.com	2024-07-01	2025-07-01	Valid
2	My Blog	https://myblog.org	2024-07-05	2024-07-20	Expiring

Each row should include a valid website URL in the Link column.

🛠️ How It Works

Scheduled Trigger
- Executes weekly (Monday 7:00 AM).
Fetch Website List
- Reads all website entries from the Google Sheet.
Check SSL Certificates
- Uses ssl-checker.io API to retrieve certificate details for each website.
Update Spreadsheet
- Writes "Issued On" and "Expired On" fields back to the spreadsheet.
Evaluate SSL Expiry
- Filters for certificates expiring within 14 days.
Check Condition
- Determines whether to send alerts based on filtered results.
Send Email Alert
- Notifies via email if any certificates are expiring soon.

📬 Example Email Output

Subject: ⚠️ ALERT!! SSL EXPIRED

SSL certificates expiring soon:
- example.com (expires in 5 days)
- anotherdomain.net (expires in 3 days)

🧰 Setup Requirements

A Google Sheet with the correct columns and website links.
SMTP credentials to send alert emails.

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 - Get SSL

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

Block 2 - Loop

Type / Role: n8n-nodes-base.splitInBatches - splitInBatches
Config choices: Version 3

Block 3 - Update SSL in Spreadsheet

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

Block 4 - Trigger Every Monday

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

Block 5 - SSL Not Good?

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

Block 6 - Get Website List

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

Block 7 - Code

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

Block 8 - Sticky Note1

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

Block 9 - Sticky Note

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

Block 10 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 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 - Sticky Note5

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

Block 14 - Sticky Note6

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

Block 15 - Send Email Alert

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

Block 16 - Sticky Note7

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

3. Summary Table

Workflow	Monitor SSL certificate expiry with Google Sheets and email alerts
Complexity	advanced
Nodes	16
Categories	SecOps
Author	Agus Narestha
Published	08 Jul 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/5768/5768.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 email alerts do?

SSL Certificate Monitoring & Expiry Alert with Spreadsheet [FREE APIs] What This Workflow Does This n8n template automatically monitors SSL certificates of websites listed in a Google Sheet an...

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.

Agus Narestha

2 workflows

Nodes

n8n-nodes-base.httprequest n8n-nodes-base.splitinbatches n8n-nodes-base.googlesheets n8n-nodes-base.scheduletrigger n8n-nodes-base.if n8n-nodes-base.code n8n-nodes-base.stickynote n8n-nodes-base.emailsend

Complexity

advanced

Published 08 Jul 2025

Likes 0

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Install path: /data/workflows/5768/5768.json

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Monitor SSL certificate expiry with Google Sheets and email alerts

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

🔒 SSL Certificate Monitoring & Expiry Alert with Spreadsheet [FREE APIs]

✅ What This Workflow Does

🧩 Key Features

📂 Input Spreadsheet Format

🛠️ How It Works

📬 Example Email Output

🧰 Setup Requirements

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Get SSL

Block 2 - Loop

Block 3 - Update SSL in Spreadsheet

Block 4 - Trigger Every Monday

Block 5 - SSL Not Good?

Block 6 - Get Website List

Block 7 - Code

Block 8 - Sticky Note1

Block 9 - Sticky Note

Block 10 - Sticky Note2

Block 11 - Sticky Note3

Block 12 - Sticky Note4

Block 13 - Sticky Note5

Block 14 - Sticky Note6

Block 15 - Send Email Alert

Block 16 - Sticky Note7

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