Day 3 - How to Build an AI Agent to Automatically Draft Gmail Replies in n8n

If you want to learn:


- How to build a Gmail AI auto-responder using n8n workflow automation?

- How to create draft replies to incoming emails automatically with AI agents?

- How to set up Gmail integration in n8n using Google OAuth credentials?

- How to filter and read incoming emails from your Gmail inbox using n8n?

- How to automate email triage and classification without sending messages directly?

- How to manage high volume of emails intelligently while staying in charge of editing and approving emails before they go out?


Then this lecture is for you!



In this hands-on tutorial, you'll build a complete Gmail AI integration workflow in n8n that automatically generates draft replies to incoming emails. You'll start by setting up Google OAuth credentials in n8n and connecting to the Gmail API. The lecture walks you through creating an AI agent that can read messages from your Gmail inbox using filtered queries (like emails received in the last day) and then draft intelligent responses using OpenAI's chat model.


You'll learn how to configure the Gmail node to consume the Gmail API, apply filters to incoming messages, and use JavaScript expressions with Luxon for date handling. The workflow demonstrates how to create draft replies in Gmail that place responses into the Gmail thread without automatically sending them—keeping you in control of editing and approving emails before they go out.


This n8n workflow template is designed for anyone who manages a high volume of emails or often face writer's block when crafting responses. You'll discover how to set up tool permissions carefully, ensuring your AI agent only has access to operations you're comfortable with. The lecture covers adding the n8n redirect URI to the Google Cloud Console, configuring message operations (Get many, Create draft), and testing the complete automation workflow.


By the end, you'll have a working Gmail AI auto-responder that reads your inbox, analyzes incoming messages, and intelligently generates draft replies—perfect for busy executives and professionals managing high email volumes while maintaining productivity and control.