Automate Zendesk Support Replies with GPT-4o-mini, Google Sheets & Gmail

Description

This workflow automates Zendesk ticket handling with AI-powered auto-replies. It pulls in new support tickets, checks against a Google Sheets FAQ database, and generates accurate responses using GPT-4o-mini. If the question matches an FAQ, the system replies with the predefined answer; otherwise, it drafts a polite, professional custom response. Finally, the workflow formats and sends the reply via Gmail, ensuring customers always receive quick and reliable support.

What This Template Does (Step-by-Step)

🎫 Fetch Latest Zendesk Ticket
Retrieves and filters tickets, keeping only the most recent one.
📋 Load FAQ Knowledge Base (Google Sheets)
Provides predefined answers for common support queries.
🔀 Merge Ticket + FAQs
Combines ticket details and FAQ list into one clean dataset.
🧹 Prepare Data for AI
Restructures merged data into JSON with two sections: ticket + faqs.
🤖 Generate Support Reply (Azure OpenAI GPT-4o-mini)

• If ticket matches FAQ → sends exact predefined answer.
• If no match → crafts a polite AI-generated reply.
  📧 Fetch Requester Email (Zendesk)
  Resolves requester_id into a usable customer email.
  🔗 Merge Reply + User Info
  Joins AI reply with customer’s email into one dataset.
  📝 Format for Gmail
  Creates a ready-to-send JSON: to, subject, body.
  📨 Send Auto-Reply (Gmail)
  Delivers the response directly to the customer’s inbox.

Prerequisites

• Zendesk account & API credentials
• Google Sheet with FAQ list (questions + answers)
• n8n instance (cloud or self-hosted)
• Azure OpenAI API key (GPT-4o-mini)
• Gmail API credentials (for reply delivery)
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Step-by-Step Setup

• Connect Zendesk API → Pull latest tickets.
• Configure Google Sheets → Load FAQ dataset.
• Merge both streams (ticket + FAQs) → Prepare JSON.
• Use LLM (Azure OpenAI GPT-4o-mini) → Match against FAQ or generate AI response.
• Fetch Requester Email from Zendesk.
• Merge AI reply + email address.
• Format structured JSON for Gmail.
• Send final email via Gmail OAuth2.

Customization Ideas

⚡ Add Slack/Teams notification for each reply sent.
📊 Log all ticket + AI replies into Airtable/Notion for tracking.
🎨 Personalize tone of AI responses (friendly, formal, technical).
📂 Add auto-tagging in Zendesk (e.g., “AI handled” vs “FAQ match”).
🔁 Extend workflow to escalate unresolved queries to human agents.

Key Benefits

✅ Always-on support replies — no waiting time
✅ Accurate FAQ answers + fallback to AI-generated responses
✅ Seamless Gmail integration for customer communication
✅ Reduces manual ticket load on agents
✅ Fully customizable for tone, logging, and escalation

Perfect For

🎯 Customer support teams handling repetitive queries
📈 Growing startups needing scalable support
🤖 Businesses wanting AI + FAQ hybrid support
📩 Any company using Zendesk + Gmail for customer service