CustomJS This workflow corresponds to n8n.io template #5172 — we link there as the canonical source.
This workflow follows the Google Sheets → Slack recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"id": "nHaj5PMTnVMoiUXB",
"meta": {
"templateCredsSetupCompleted": true
},
"name": "Monitor SSL certificate expiry dates with Google Sheets & Slack alerts",
"tags": [
"SSL",
"Monitoring",
"Google Sheets",
"Slack",
"Alerts",
"Security",
"Automation"
],
"nodes": [
{
"id": "a2e344e1-c22a-4044-885d-e7dbe2f2fb6d",
"name": "Update row in sheet",
"type": "n8n-nodes-base.googleSheets",
"position": [
-288,
16
],
"parameters": {
"columns": {
"value": {
"Website": "={{ $json.output.host }}",
"Days Left": "={{ $json.output.daysLeft }}"
},
"schema": [
{
"id": "Website",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "Website",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Days Left",
"type": "string",
"display": true,
"required": false,
"displayName": "Days Left",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "row_number",
"type": "number",
"display": true,
"removed": true,
"readOnly": true,
"required": false,
"displayName": "row_number",
"defaultMatch": false,
"canBeUsedToMatch": true
}
],
"mappingMode": "defineBelow",
"matchingColumns": [
"Website"
],
"attemptToConvertTypes": false,
"convertFieldsToString": false
},
"options": {},
"operation": "update",
"sheetName": {
"__rl": true,
"mode": "list",
"value": "gid=0",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1FmbkG1mX7jg6jnAXQRIT-xgNXQ76yYgc62WPIW7rejI/edit#gid=0",
"cachedResultName": "Sheet1"
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "1FmbkG1mX7jg6jnAXQRIT-xgNXQ76yYgc62WPIW7rejI",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1FmbkG1mX7jg6jnAXQRIT-xgNXQ76yYgc62WPIW7rejI/edit?usp=drivesdk",
"cachedResultName": "Domains"
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 4.7
},
{
"id": "e3bd4ac4-c03d-47fe-9d5e-0eb1e3fa0748",
"name": "Send a message",
"type": "n8n-nodes-base.slack",
"position": [
208,
0
],
"parameters": {
"text": "=\u23f0 Reminder: SSL certificate of {{ $('Update row in sheet').item.json.Website }} will expire in {{ $json[\"Days Left\"] }} days.",
"user": {
"__rl": true,
"mode": "list",
"value": "U05EAUS4JCD",
"cachedResultName": "hammadawan0007"
},
"select": "user",
"otherOptions": {}
},
"credentials": {
"slackApi": {
"name": "<your credential>"
}
},
"typeVersion": 2.3
},
{
"id": "090961cf-0d4f-401f-9c27-5868bee1548e",
"name": "Schedule Trigger",
"type": "n8n-nodes-base.scheduleTrigger",
"position": [
-1088,
16
],
"parameters": {
"rule": {
"interval": [
{
"field": "weeks"
}
]
}
},
"typeVersion": 1.2
},
{
"id": "1f09a04b-4346-43e5-a648-bf3bd551924b",
"name": "Check Days Left Threshold",
"type": "n8n-nodes-base.if",
"position": [
-48,
16
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "3ce0ef67-751d-4a37-959a-08427894f449",
"operator": {
"type": "number",
"operation": "lt"
},
"leftValue": "={{ $json['Days Left'] }}",
"rightValue": 8
}
]
}
},
"typeVersion": 2.2
},
{
"id": "c9deae55-c428-419b-a345-34b9360d2773",
"name": "Check SSL",
"type": "@custom-js/n8n-nodes-pdf-toolkit-v2.pdfToolkit",
"position": [
-576,
16
],
"parameters": {
"domain": "={{ $json.Website }}",
"resource": "web",
"operation": "sslCheck"
},
"credentials": {
"customJsApi": {
"name": "<your credential>"
}
},
"typeVersion": 1
},
{
"id": "22f6b6c2-f212-40c1-9c5c-0517e712376b",
"name": "Get row(s) in sheet",
"type": "n8n-nodes-base.googleSheets",
"position": [
-864,
16
],
"parameters": {
"options": {},
"sheetName": {
"__rl": true,
"mode": "list",
"value": "gid=0",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1FmbkG1mX7jg6jnAXQRIT-xgNXQ76yYgc62WPIW7rejI/edit#gid=0",
"cachedResultName": "Sheet1"
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "1FmbkG1mX7jg6jnAXQRIT-xgNXQ76yYgc62WPIW7rejI",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1FmbkG1mX7jg6jnAXQRIT-xgNXQ76yYgc62WPIW7rejI/edit?usp=drivesdk",
"cachedResultName": "Domains"
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 4.7,
"alwaysOutputData": true
}
],
"active": false,
"settings": {
"executionOrder": "v1"
},
"versionId": "fce16f52-c041-4ad9-8621-7013ed85286f",
"connections": {
"Check SSL": {
"main": [
[
{
"node": "Update row in sheet",
"type": "main",
"index": 0
}
]
]
},
"Schedule Trigger": {
"main": [
[
{
"node": "Get row(s) in sheet",
"type": "main",
"index": 0
}
]
]
},
"Get row(s) in sheet": {
"main": [
[
{
"node": "Check SSL",
"type": "main",
"index": 0
}
]
]
},
"Update row in sheet": {
"main": [
[
{
"node": "Check Days Left Threshold",
"type": "main",
"index": 0
}
]
]
},
"Check Days Left Threshold": {
"main": [
[
{
"node": "Send a message",
"type": "main",
"index": 0
}
]
]
}
}
}
Credentials you'll need
Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.
customJsApigoogleSheetsOAuth2ApislackApi
For the full experience including quality scoring and batch install features for each workflow upgrade to Pro
About this workflow
This n8n workflow illustrates how to monitor and track SSL certificate expiration dates for any domain using the SSL Checker node from customJS. It automatically updates a Google Sheet with the number of days left until expiry and sends a Slack notification when certificates are…
Source: https://n8n.io/workflows/5172/ — original creator credit. Request a take-down →
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