n8n Workflow: Track Google Shopping Prices & Alert Slack

Get Google Shopping price drops on Slack—automatically

This n8n workflow checks Google Shopping product prices every day, compares them to your last run stored in Google Sheets, and sends a threshold-based alert summary to Slack only when something meaningful changes.

What this workflow does

• Runs daily on a schedule to keep pricing intelligence up to date.
• Loads your product list, location, and alert thresholds, then reads the previous prices and undercut state from the Google Sheets “Latest” tab.
• Searches Google Shopping via SearchApi.io for each product (new items only), pulling current offer information.
• Calculates a typical market price using the median and identifies the lowest “legit” offer per product.
• Detects undercut events by comparing the typical price to the previous run and flagging when the lowest offer undercuts your specified price threshold.
• Posts to Slack with a Block Kit message that includes only notable items (large price moves, newly undercut items, or first-seen products) and skips quiet days.
• Logs results in Google Sheets by appending priced outcomes to “History” and upserting one row per product into “Latest”.

Use cases

• SaaS operators monitoring competitor pricing for a defined catalog and wanting actionable Slack alerts.
• Automation engineers building an always-on price tracking pipeline using n8n + SearchApi.io.
• Teams who need auditability: daily snapshots in Google Sheets plus only significant notifications in Slack.

Technical details

• SearchApi.io for Google Shopping searches (SearchApi node with your API credential).
• Google Sheets integration using a configured Spreadsheet ID, with “Latest” and “History” tabs.
• Slack OAuth2 for alert delivery using Slack Block Kit formatting.
• n8n nodes/logic include set, code, filter, slack, and supporting steps like sticky note.