Generate Automated Daily Email Digests with Gmail and GPT-3.5 via OpenRouter

Description

AI-Powered Daily Gmail Digest Summary using LangChain & OpenRouter
This n8n template helps you automatically summarize your daily Gmail messages using OpenRouter's GPT model via LangChain. It generates a structured email digest highlighting key information, tasks, issues, and action items — all delivered to your inbox every morning.

Who’s it for
Busy professionals who want a quick overview of their daily emails
Founders or managers needing to track team or client communication
Anyone looking to automate inbox triage and reduce time spent on emails

How it works / What it does
This n8n workflow runs every morning at 7 AM, automatically:

Fetches emails from the last 24 hours
Collects important fields: sender, subject, and snippets
Feeds them into an AI-powered agent (OpenRouter + LangChain)
The AI:
Extracts key topics, tasks, deadlines, and issues
Formats the info clearly with a bullet-point summary
Sends the final summarized report to your inbox

How to set up
Clone or import the workflow into your n8n instance
Replace <Your Email ID> in the Code node with your actual Gmail address (or remove if not needed)
Ensure your Gmail and OpenRouter credentials are set up in n8n
Update the recipient email in the Send Summary node if you want it sent to a fixed address
Activate the workflow once tested

How to customize the workflow
Change Summary Style:** Edit the system message in the LangChain Agent to match your tone (e.g. casual, business, detailed)
Adjust Digest Time:** Change the Schedule Trigger to any preferred hour
Customize Recipients:** Change or add recipients dynamically or statically in the Gmail send node
Filter Email Type:** Modify the Gmail query in the Code node to include filters like from:, is:unread, subject:project