WhatsApp AI Customer Assistant - Gmail Integration

This workflow automates customer interactions via WhatsApp using an AI assistant with Gmail integration, replacing manual responses that consume 15+ hours weekly for teams handling 200+ messages monthly. It receives WhatsApp messages, validates content, processes queries with a GPT-4o-mini-powered AI agent, maintains conversation context, sends emails via Gmail when requested, and responds within WhatsApp character limits. Key nodes include WhatsAppTrigger (WhatsApp Trigger) for input, If (Message Filter) for validation, Set (Context Builder) for data preparation, LangChain Agent (AI Assistant) for processing, OpenAI (AI Model) for responses, MemoryBufferWindow (Chat Memory) for context, GmailTool (Gmail Tool) for email sending, WhatsApp (WhatsApp Responder) for replies, and WhatsApp (Error Handler) for fallback. Ideal for customer support or sales teams (3-10 staff) in e-commerce, services, or retail ($500K-$5M revenue), it reduces response time by 85% for 200-1,000 messages monthly.\n\nSaves 12 hours/week on 200+ messages, improving response speed by 85%. Suits customer support, sales inquiries, or automated FAQs. Requires WhatsApp Business API ($0.01-$0.05/message, developers.facebook.com), OpenAI API ($0.01-$0.03/1K tokens, platform.openai.com), Gmail API (free, console.developers.google.com), n8n ($20/month cloud). Scalable to 2,000 messages/month; needs HTTPS.\n\nSetup Instructions:\n1. Install n8n via cloud.n8n.io or self-host (docker run -it --rm -p 5678:5678 n8nio/n8n).\n2. Set up WhatsApp Business API at developers.facebook.com; configure whatsAppTrigger and whatsApp nodes with credentials.\n3. Set up OpenAI API at platform.openai.com; configure openAiApi for AI Model.\n4. Set up Gmail API at console.developers.google.com; configure gmailTool credentials.\n5. Configure webhook for WhatsApp messages.\n6. Set environment variables: WHATSAPP_ACCESS_TOKEN, OPENAI_API_KEY, GOOGLE_CLIENT_EMAIL, GOOGLE_PRIVATE_KEY.\n\nTesting:\n- Send WhatsApp message: 'Help with order #123'. Verify AI response and context retention.\n- Send: 'Send email to test@example.com about order status'. Confirm email sent and WhatsApp confirmation.\n- Test invalid input: Send '<script>alert()</script>'. Check error response from Error Handler.\n\nErrors:\n- 400 (invalid input, ensure message is non-empty and <2000 characters).\n- 429 (API rate limit, adjust maxTokens or add delay).\n- No response (API failure, verify WhatsApp/OpenAI/Gmail credentials).\n\nMaintenance:\n- Rotate API keys quarterly.\n- Monitor n8n logs for API failures.\n- Update spam-filter regex in Message Filter monthly for new patterns.\n\nOptimization:\n- Adjust maxTokens or temperature in AI Model for response quality.\n- Increase contextWindowLength in Chat Memory for longer conversations.\n- Add custom tools (e.g., CRM lookup) to AI Assistant for extended functionality.", "businessValue": "Saves 12 hours/week on 200+ messages with 85% faster responses", "setupTime": "45-60 minutes", "difficulty": "Intermediate", "requirements": [ "WhatsApp Business API ($0.01-$0.05/message, developers.facebook.com)", "OpenAI API ($0.01-$0.03/1K tokens, platform.openai.com)", "Gmail API (free, console.developers.google.com)", "n8n cloud ($20/month) or self-hosted", "Stable HTTPS connection", "Environment variables: WHATSAPP_ACCESS_TOKEN, OPENAI_API_KEY, GOOGLE_CLIENT_EMAIL, GOOGLE_PRIVATE_KEY" ], "useCase": "Automating WhatsApp customer interactions with AI responses and Gmail integration"