# Send webpage change alerts with Browserless and Google Drive: n8n workflow

> Started by a clock, and works across Gmail, Google Drive and n8n data table. It hands the judgement calls to Gemini.

Source: https://millionrounds.com/workflow/send-webpage-change-alerts-with-browserless-and-google-drive (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Alerts and monitoring](https://millionrounds.com/workflows?category=Alerts+and+monitoring#library)

# Send webpage change alerts with Browserless and Google Drive

Started by a clock, and works across Gmail, Google Drive and n8n data table. It hands the judgement calls to Gemini. 17 steps, 1 branch: a working afternoon to understand properly.

Medium Calls a model: Gemini

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fsend-webpage-change-alerts-with-browserless-and-google-drive)

**17 steps** Medium: a working afternoon

**1** Branch: places the flow splits

**0** Loops or waits

**3** Services it connects to

## The flow

Starts it 1 Model 1 Logic 4 Service 11

The steps in the order they run, from what starts it.

- 1 **Check on a schedule** Schedule trigger *Starts it*
- 2 **Configuration (edit this first)** Set *Logic*
- 3 **Ensure state table exists** Data Table *Service*
- 4 **Capture current screenshot** Browserless *Service*
- 5 **Archive screenshot to Drive** Google Drive *Service*
- 6 **Check: first time watching this URL?** Data Table *Service*
- 7 **Check: seen this URL before?** Data Table *Service*
- 8 **Save first screenshot as baseline** Data Table *Service*
- 9 **Look up last screenshot ID** Data Table *Service*
- 10 **Email: baseline captured** Gmail *Service*
- 11 **Download previous screenshot** Google Drive *Service*
- 12 **Combine current and previous images** Code *Logic*
- 13 **Compare screenshots with AI** Google Gemini *Model*
- 14 **Update last-checked state** Data Table *Service*
- 15 **Did the AI detect a meaningful change?** If *Logic*
- 16 **Email: change alert** Gmail *Service*
- 17 **No meaningful change - nothing to do** No Op *Logic*

## How it's built

- **Starts on:** A clock
- **Steps:** 17, with 1 branch
- **Size:** Medium: a working afternoon
- **Connects to:** Gmail, Google Drive, n8n data table
- **Model:** Gemini

## Questions

What does it need to run?

An n8n account, plus your own Gmail and Google Drive accounts, and a key for Gemini. You connect your own accounts after importing it; none are included.

What starts it?

It starts on a clock.

Does it use AI?

Yes. It calls Gemini. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 17 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

**Before you run it**

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 17 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fsend-webpage-change-alerts-with-browserless-and-google-drive)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Gmail](https://millionrounds.com/workflows?service=Gmail#library)[Google Drive](https://millionrounds.com/workflows?service=Google+Drive#library)[n8n data table](https://millionrounds.com/workflows?service=n8n+data+table#library)

## Workflows like it

Also alerts and monitoring, with the same services where possible, closest in size first.

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- [**Automated error monitoring and reporting system with OpenAI** 17 steps · calls a model · Gmail, n8n data table](https://millionrounds.com/workflow/automated-error-monitoring-and-reporting-system-with-openai)
- [**Automated stock technical analysis with Grok and Gmail** 17 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/automated-stock-technical-analysis-with-grok-and-gmail)
- [**Classify supplier tiers with Google Sheets and Groq** 17 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/classify-supplier-tiers-with-google-sheets-and-groq)