Auto-Reply to Instagram Comments — Without Spamming

This n8n workflow automatically monitors an Instagram post/reel, detects new comments, replies instantly with your pre-written message (including an optional DM link / template link), and saves every contacted user in Google Sheets so they never get replied to twice.

Built for creators, agencies, and shops who want consistent engagement without manual work.

✅ What This Workflow Does

• ⏰ Checks comments on a specific post every 15 minutes  
• 🆕 Detects new comments only (filters out already-contacted comment IDs)  
• 💬 Sends an automated reply using your custom message (e.g., “Thanks! Here’s the template: (link)”)  
• 🧾 Logs each reply into Google Sheets (comment_id, username, timestamp, message_sent, post_url)  
• ✅ Tracks success + ❌ logs failures for debugging  
• 📊 Generates a run summary (total comments, new comments, success/failed replies)  

🔧 Tools Used

• n8n
• upload-post.com API (fetch comments + send replies)  
• Google Sheets (anti-duplicate log + history)  

📦 What You Receive

• Full n8n workflow JSON
• Duplicate-proof filtering logic
• Google Sheets logging structure
• Ready-to-edit “post URL + reply message + IG username” config node  

⚙ Requirements (Not Included)

• n8n (cloud or self-hosted)
• upload-post.com API key
• Google Sheets OAuth (connected in n8n)
• Instagram post/reel URL + profile username