AI Document Classifier: Seamless Google Drive Automation

Transform Document Management with AI-Powered Classification and Google Drive Automation

Stop manually sorting invoices and documents. This intelligent n8n workflow uses an AI agent to automatically classify uploaded documents and route them to the correct Google Drive folders—no rule-based logic or complex Switch nodes required. Documents the AI can't confidently classify are flagged for human review with instant Slack notifications.

What This Workflow Does

Upload any document (PDF, PNG, JPEG) through a hosted web form and watch the AI agent take over:

• Document uploads to a temporary "Incoming" folder in Google Drive
• AI agent analyzes the content and determines the correct category
• Agent automatically calls the matching move tool (e.g., move_to_medical, move_to_restaurant)
• Uncertain classifications trigger "Move to Needs Review" with Slack alerts
• Supports five invoice categories: medical, restaurant, hotel, trades, and telecom

Perfect Use Cases

• Small Business Accounting: Automatically sort vendor invoices by category for streamlined bookkeeping
• Expense Management: Route employee receipts to appropriate department folders
• Document Processing Teams: Reduce manual classification workload with AI-powered routing
• Multi-location Operations: Centralize document intake with intelligent distribution

Technical Details

Built with enterprise-grade n8n nodes for reliability and scalability:

• Form Trigger: Hosted web form for seamless document uploads
• Google Drive Integration: OAuth2 connection for secure folder management
• LangChain AI Agent: Advanced document classification without hardcoded rules
• Slack Tool: Real-time notifications for review-required documents
• Google Drive Tools: Automated file movement and organization

This workflow eliminates the maintenance overhead of traditional rule-based document routing while providing the flexibility to handle edge cases through human review. Perfect for automation engineers looking to implement intelligent document management without complex decision trees.