Email AI Auto-Reply Agent

Tools: n8n, Claude AI, Gmail 

An AI-powered workflow that monitors your Gmail inbox and generates draft replies using Claude AI.

When a new email arrives, the workflow analyzes its content and creates a context-aware reply based on provided business knowledge. The draft is saved to Gmail Drafts as a threaded reply, with the recipient and subject pre-filled, ready for human review. No emails are sent automatically.

The workflow automatically filters out newsletters and no-reply senders. It responds in the sender's language.

Who this is for: Customer support teams, small business owners, and professionals who receive a high volume of emails and want AI-generated draft replies ready for review.

Demonstrated using NordicHome, a fictional Scandinavian furniture store.

1. Gmail Trigger monitors the inbox for new emails (every minute)

2. Automated emails are filtered out (no-reply, noreply, newsletter, notification, donotreply, unsubscribe)

3. The email content (sender, subject, body) is sent to Claude AI with the business knowledge base

4. Claude generates a professional, context-aware reply in the sender's language

5. The reply is saved as a Gmail Draft, threaded correctly under the original email, with the recipient and subject pre-filled

6. A human reviews and sends (or edits) the draft

Nodes: 5

Key integrations: Gmail (trigger + draft creation), Claude AI (via OpenRouter)

Notable features:

• Automatic filtering of newsletters and automated senders (6 filter conditions)

• Replies in the sender's language

• Threaded correctly in Gmail (using threadId)

• Draft only: no automatic sending, human stays in control

• Business knowledge provided via system prompt (easily customizable for any business)