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Summarize daily Gmail emails with Gemini and send to Slack, WhatsApp and Docs

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Created by: Tricore Infotech Pvt Ltd || jinitp
Tricore Infotech Pvt Ltd

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Last update 3 days ago

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AI Daily Email Summary - Auto-Delivered to Slack, WhatsApp & Docs (Gmail + Gemini)

Summary

Stop starting your day by drowning in unread emails. This workflow runs every morning and turns your Gmail inbox into a clean, prioritized briefing — automatically organized into what needs your attention, what meetings are coming up, and what you can read later. The summary lands wherever you already live: Google Docs, Gmail, Slack, or WhatsApp.

Powered by Google Gemini 2.5 Flash, with a built-in privacy layer that scrubs passwords, OTPs, and API keys before they ever leave your n8n instance.

Key features

  • Prioritized daily briefing: Gemini reads your last 24 hours of email and groups it into Action Required, Meetings & Events, and Important Updates — so you know exactly where to focus.
  • Deliver anywhere: Route your summary to Google Docs (as a daily log), Gmail (as a formatted report), Slack (as a DM), or WhatsApp — toggle each channel on or off from a single config node.
  • Safe to use with AI: A regex-based privacy layer scrubs sensitive patterns (OTPs, passwords, API keys, card numbers) inside n8n before anything reaches the AI model.
  • Zero wasted API calls: If your inbox is empty, the workflow skips the AI step entirely and sends a clean "no emails" status instead.
  • Built-in error alerts: If any step fails — expired credentials, API error — you get a diagnostic email automatically so nothing breaks silently.

How it works

  1. Trigger: Runs on a daily schedule (fully configurable).
  2. Fetch & clean: Pulls primary emails from the last 24 hours and scrubs sensitive patterns before processing.
  3. Summarize: Gemini 2.5 Flash generates a formatted text summary, categorized by priority.
  4. Deliver: Your summary is routed to whichever channels you've toggled on in the config node.
  5. Monitor: A global error handler catches failures and emails you a crash report.

Nodes used

  • Gmail (Fetch, Send, Error Alert)
  • Google Gemini (LangChain Native Node)
  • Slack (Post Alert)
  • WhatsApp Business Cloud API
  • Google Docs (Create & Append)
  • Schedule Trigger
  • Error Trigger
  • Code (PII Scrubbing & Formatting)

Setup instructions

  1. Credentials: Connect Gmail, Google Docs, Slack, WhatsApp, and your Google Gemini API key. (Note: You only need one Gmail OAuth2 credential. n8n will use this single connection for both fetching your inbox and sending the final summary email).
  2. Config node & Fallback: Open ⚙️ Set Configuration and fill in your target email, Slack user ID, and WhatsApp number. (Optional: Open the "Gmail: Send Error Alert" node at the bottom and replace PASTE_FALLBACK_EMAIL_HERE with a backup admin email, ensuring you get crash reports even if the config node fails).
  3. Toggle channels: Set each receiveOverviewIn... field to true for the platforms you want to activate.
  4. Test: Click Test Workflow — a sample email with a dummy password is pinned to the trigger so you can see the PII scrubber and summary in action immediately.
  5. Activate: Switch the workflow to Active and your first briefing runs on schedule.

Requirements

  • n8n version 1.0+
  • Google Gemini API key

    Note on Model Selection: This template uses gemini-2.5-flash, which is currently in preview. If it is unavailable in your region or you encounter rate limits, simply open the Generate AI Summary node and switch the model to gemini-1.5-flash.

  • API scopes: Gmail (readonly, send), Google Docs (write), Slack (chat:write), WhatsApp Business

Customization ideas

  • Change email scope: Edit the labels in the Gmail fetch node to include Promotions, Updates, or a specific sender.
  • Filter by project: Enable filterBySubject or filterBySender in the config node to build a summary focused on one client or topic.
  • Adjust the tone: Edit the prompt in the Build LLM Prompt node to make summaries more detailed, more concise, or in a different language.
  • Change the schedule: Update the Schedule Trigger to run twice a day, weekly, or on any cadence you need.

Use cases

  • Start every morning with a 60-second read of everything that matters in your inbox.
  • Keep a searchable daily email log in Google Docs without lifting a finger.
  • Stay on top of client communications even when you're away from your inbox.
  • Safely use AI for email management without exposing passwords or OTPs to external model providers.