Does this work on any website?

It works on pages where the price is in the initial HTML. Pages that render price via JavaScript need a headless-browser-capable fetch instead — noted in the guide.

Can I track multiple products at once?

Yes — duplicate the fetch/extract/compare chain per URL, or loop over a list of URLs stored in a sheet.

MonitoringStructurally Validated

Competitor Price Monitor

This automation checks a competitor's (or your own) product page once a day, logs every price it finds, and compares it against the last known value. The moment the price changes, your team gets a Slack alert with the before-and-after — so you find out about a price move the same day, not weeks later.

Automation flow

Step 1

Daily Check (07:00)

Runs automatically every morning.

Step 2

Fetch Competitor Page

The product page's HTML is fetched.

Step 3

Extract Price

The current price is pulled out of the page.

Step 4

Log Price

Every check is recorded in a full price history.

Step 5

Price Changed?

The new price is compared against the last known value.

Step 6

Notify Team

Slack alerts your team with the before/after price.

How it works

1Every day at 7 AM, the page is fetched.
2A simple pattern match pulls the first dollar amount out of the page's HTML.
3Every check is logged to Price History regardless of whether it changed, so you have a full timeline.
4The new price is compared against the Last Known value.
5If it's different, Last Known is updated and your team gets a Slack alert with the before/after price.

Services used

HTTP RequestGoogle SheetsSlack

What you'll need

An n8n Cloud or self-hosted account
The URL of the product page you want to track
A Google account (Sheets)
A Slack workspace

What's included

Full price-history log, not just the latest number
Zero ongoing cost — no scraping API or paid service
Works for any publicly visible product page
Easy to point at multiple competitors

Estimate what this could save you

Times per week

Minutes each time

Your hourly value ($)

3.6 hours/month

≈ $108/month in your time

A rough estimate based on what you enter above — not a guarantee. Actual time saved depends on your process.

Make it yours

Track several competitors by duplicating the fetch → extract → compare chain per URL, or loop over a list of URLs stored in a sheet.
Add a percentage-change threshold in "Price Changed?" instead of any change, to ignore tiny fluctuations.
If the site renders prices via JavaScript (a single-page app), a plain HTTP request won't see them — you'd need a headless-browser-capable fetch instead.

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Questions about this template

$15one-time

Secure checkout via Polar. Delivered by email instantly.

Structurally validated: automatically checked for valid n8n format before every deploy.

Difficulty: Medium
Setup time: ~15 min
Integrations: 3
Node count: 8
Format: .json + guide