Automation library · Alerts and monitoring

Monitor website changes with Google Sheets and Gemini

Started by a clock, and works across Google Sheets and Telegram. It hands the judgement calls to Gemini. 17 steps: a working afternoon to understand properly.

MediumCalls a model: Gemini

Download free
17 stepsMedium: a working afternoon
0Branches: places the flow splits
0Loops or waits
2Services it connects to

The flow

Starts it 1Model 2Logic 9Service 5

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

  1. 1Every 10 Minutes TriggerSchedule triggerStarts it
  2. 2Google Gemini ModelLm Chat Google GeminiModel
  3. 3Read Watchlist from SheetsGoogle SheetsService
  4. 4Gemini Analysis AgentChain LlmModel
  5. 5Filter Active RowsFilterLogic
  6. 6Build Summary OutputSetLogic
  7. 7Fetch Page ContentHttp RequestService
  8. 8Update Snapshot in SheetsGoogle SheetsService
  9. 9Extract HTML TextHtmlLogic
  10. 10Filter Alert Worthy ItemsFilterLogic
  11. 11Set Clean TextSetLogic
  12. 12Send Telegram AlertTelegramService
  13. 13Set Watch TextSetLogic
  14. 14Generate Page HashCryptoService
  15. 15Build Page RecordSetLogic
  16. 16Filter Unchanged PagesFilterLogic
  17. 17Prepare Diff PromptSetLogic

How it's built

Starts on
A clock
Steps
17
Size
Medium: a working afternoon
Connects to
Google Sheets, Telegram
Model
Gemini

Questions

What does it need to run?

An n8n account, plus your own Google Sheets and Telegram 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.