Google Maps Review Alerts to Slack (API Direct) in n8n

Get notified on damaging Google Maps reviews—instantly in Slack

This n8n workflow automatically checks your Google Maps business listing every morning and posts alerts for new 1–3 star reviews directly to Slack (using API Direct) so your team can respond fast.

What this workflow does

• Runs on a daily schedule to keep review monitoring up to date.
• Searches Google Maps via API Direct using a plain-text business query (name + location) and keeps the top matching place.
• Fetches the newest Google Maps reviews for that place via API Direct.
• Deduplicates reviews by storing previously seen review IDs in the workflow’s persistent static data—so you only get alerts for reviews you haven’t posted yet.
• Filters for low ratings: only reviews with a rating of 3 stars or lower are selected for alerts.
• Posts to Slack with actionable details: rating, author, timestamp, a snippet of the review text, whether the owner replied, and a direct review link.

Use cases

• Local businesses (or SaaS teams managing locations) want immediate visibility into negative Google Maps sentiment.
• Support or reputation managers need a Slack feed of low-rated reviews for faster internal triage.
• Operators monitoring multiple places can expand coverage by looping over a list of locations.

Technical details

• Integrations: API Direct (Google Maps data) and Slack (alerts)
• n8n nodes used: set, code, limit, slack, filter, sticky note
• Key setup: add your API Direct API key in n8n credentials, select the destination Slack channel, and update the business search text in the business settings.

Want stricter alerts? Adjust the filter to target 1–2 stars only, or modify it to alert on all reviews.