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Monitor legal policy changes with Google Sheets, Gmail and GPT-4o

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Monitor legal policy changes with Google Sheets, Gmail and GPT-4o preview
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1. Workflow Overview

Terms of Service Change Watcher with AI Summaries Automatically monitors Terms of Service, Privacy Policy, and other legal pages for changes. When content changes are detected, GPT 4o analyzes the ...

Best for

  • Document Extraction automation workflows
  • AI Summarization automation workflows
  • advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.scheduletrigger, n8n-nodes-base.googlesheets, n8n-nodes-base.httprequest, n8n-nodes-base.code, n8n-nodes-base.if, @n8n/n8n-nodes-langchain.chainllm, @n8n/n8n-nodes-langchain.lmchatopenai, n8n-nodes-base.gmail

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title
Monitor legal policy changes with Google Sheets, Gmail and GPT-4o
Workflow name
Monitor legal policy changes with Google Sheets, Gmail and GPT-4o

Terms of Service Change Watcher with AI Summaries

Automatically monitors Terms of Service, Privacy Policy, and other legal pages for changes. When content changes are detected, GPT-4o analyzes the old vs new text and emails you a plain-English summary with an impact rating.

How it works

  1. Every day at 8 AM, the workflow reads your list of URLs from a Google Sheet
  2. Each page is fetched and stripped to plain text
  3. The text is compared against the previously stored version
  4. If a change is detected, the old and new content are sent to GPT-4o for analysis
  5. You receive an email with a summary of exactly what changed and how it impacts you
  6. All changes are logged to a Change Log sheet for a historical record

Setup

  1. Create a Google Sheet with two tabs: Pages (columns: url, page_name, last_content, last_checked) and Change Log (columns: date, page_name, url, summary)
  2. Add the URLs you want to monitor in the Pages tab — leave last_content and last_checked empty
  3. Connect your Google Sheets OAuth2, Gmail OAuth2, and OpenAI API credentials
  4. Update the Google Sheet document in all four Google Sheets nodes
  5. Set your email address in the Send Change Alert node
  6. Run once to save baselines, then activate 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 - Daily Check

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

Block 2 - Get Pages to Monitor

Type / Role
n8n-nodes-base.googleSheets - googleSheets
Config choices
Version 4.7

Block 3 - Fetch Page

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

Block 4 - Extract & Compare

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

Block 5 - Content Changed?

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

Block 6 - Summarize Changes

Type / Role
@n8n/n8n-nodes-langchain.chainLlm - chainLlm
Config choices
Version 1.9

Block 7 - OpenAI Chat Model

Type / Role
@n8n/n8n-nodes-langchain.lmChatOpenAi - lmChatOpenAi
Config choices
Version 1.3

Block 8 - Build Email Body

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

Block 9 - Send Change Alert

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

Block 10 - Log Change

Type / Role
n8n-nodes-base.googleSheets - googleSheets
Config choices
Version 4.7

Block 11 - Update Page Record

Type / Role
n8n-nodes-base.googleSheets - googleSheets
Config choices
Version 4.7

Block 12 - Update Last Checked

Type / Role
n8n-nodes-base.googleSheets - googleSheets
Config choices
Version 4.7

Block 13 - Sticky Note

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

Block 14 - Sticky Note1

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

Block 15 - Sticky Note2

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

Block 16 - Sticky Note3

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

Block 17 - Sticky Note4

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

Block 18 - Sticky Note5

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

Block 19 - Sticky Note6

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

3. Summary Table

Workflow Monitor legal policy changes with Google Sheets, Gmail and GPT-4o
Complexity advanced
Nodes 19
Categories Document Extraction, AI Summarization
Author Alejandro Alfonso
Published 26 Mar 2026

4. Reproducing the Workflow from Scratch

  1. 1. Download the workflow JSON

    Use the JSON export at /data/workflows/14379/14379.json as the source template for this automation.

  2. 2. Import the template into n8n

    Open n8n, import the downloaded JSON, and review each node before activating the workflow.

  3. 3. Configure credentials and variables

    Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.

  4. 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. 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.

Frequently asked questions

What does Monitor legal policy changes with Google Sheets, Gmail and GPT-4o do?

Terms of Service Change Watcher with AI Summaries Automatically monitors Terms of Service, Privacy Policy, and other legal pages for changes. When content changes are detected, GPT 4o analyzes the ...

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 Document Extraction, AI Summarization use case.