Monitor website uptime and content changes with HTTP checks and Slack

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1. Workflow Overview

Quick Overview This workflow runs every 30 minutes to check a list of website URLs, detect downtime or page content changes using HTTP requests and stored workflow state, and post alerts to a Slack...

Best for

DevOps automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.scheduletrigger, n8n-nodes-base.code, n8n-nodes-base.httprequest, n8n-nodes-base.if, n8n-nodes-base.slack

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Monitor website uptime and content changes with HTTP checks and Slack
Workflow name: Monitor website uptime and content changes with HTTP checks and Slack

Quick Overview

This workflow runs every 30 minutes to check a list of website URLs, detect downtime or page content changes using HTTP requests and stored workflow state, and post alerts to a Slack channel only when something goes down, changes, or recovers.

How it works

Runs every 30 minutes on a schedule.
Builds a list of target URLs (with labels) to monitor.
Fetches each page with an HTTP GET request while capturing the full response and continuing even on 4xx/5xx errors.
Compares each page’s current status code and content signature against the last saved value in n8n workflow static data and updates the stored baseline.
Posts a message to Slack only when a page is down, its content has changed, or it has recovered.

Setup

Add a Slack credential/connection and set the destination channel (for example, #alerts).
Update the URL list (label and url fields) in the “Define URLs to Monitor” code step.
Optionally adjust the schedule interval and HTTP timeout to match your monitoring needs.

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 - Overview & Setup

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

Block 2 - Section 1 · Targets

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

Block 3 - Section 2 · Fetch

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

Block 4 - Section 3 · Diff & State

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

Block 5 - Section 4 · Alert

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

Block 6 - Every 30 Minutes

Type / Role: n8n-nodes-base.scheduleTrigger - scheduleTrigger
Config choices: Version 1.3

Block 7 - Define URLs to Monitor

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

Block 8 - Fetch Page

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.4

Block 9 - Detect Status & Content Change

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

Block 10 - Anything To Report?

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 11 - Post Alert

Type / Role: n8n-nodes-base.slack - slack
Config choices: Version 2.4

3. Summary Table

Workflow	Monitor website uptime and content changes with HTTP checks and Slack
Complexity	intermediate
Nodes	11
Categories	DevOps
Author	Julian Abt
Published	09 Jun 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/16221/16221.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

Frequently asked questions

What does Monitor website uptime and content changes with HTTP checks and Slack 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 use case.

Julian Abt

4 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.scheduletrigger n8n-nodes-base.code n8n-nodes-base.httprequest n8n-nodes-base.if n8n-nodes-base.slack

Complexity

intermediate

Published 09 Jun 2026

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/16221/16221.json

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Monitor website uptime and content changes with HTTP checks and Slack

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Quick Overview

How it works

Setup

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Overview & Setup

Block 2 - Section 1 · Targets

Block 3 - Section 2 · Fetch

Block 4 - Section 3 · Diff & State

Block 5 - Section 4 · Alert

Block 6 - Every 30 Minutes

Block 7 - Define URLs to Monitor

Block 8 - Fetch Page

Block 9 - Detect Status & Content Change

Block 10 - Anything To Report?

Block 11 - Post Alert

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