LLM WhatsApp Email Assistant: Gmail Operations and WhatsApp Replies

This workflow bridges WhatsApp and Gmail for AI-powered email management, replacing manual app-switching between messaging and inbox that fragments focus and wastes 15-25 hours weekly for sales pros juggling 400+ queries, often delaying responses and missing opportunities in siloed tools like Outlook/Slack. It triggers on WhatsApp messages or workflow calls, rate-limits long inputs (>1000 chars), validates (non-empty query/message_type), normalizes (phone/sessionId/timestamp), routes to OpenAI agent (GPT-4o, temp=0.7) with memory (15-turn buffer) for natural requests like 'Reply to Sarah's email' or 'Check new from John', executes via Gmail tools (search: query/readStatus, get: messageId, send: to/subject/message/CC/BCC, reply: messageId/replyAll), responds concisely (<200 chars, emojis) via WhatsApp or JSON, and logs analytics (request/response/success/timestamp). Key nodes: WhatsAppTrigger (messages), ExecuteWorkflowTrigger (query/sender_phone/type), IF validators (exists/length), Set processor (user_request/phone/session), Agent (prompt: 'Smart bridge, concise mobile replies'), lmChatOpenAi (maxTokens=1500), GmailTools (search/get/send/reply), MemoryBufferWindow, Switch router (WhatsApp/workflow), WhatsApp sender (Markdown), Set logger (activity_log). This aids sales/marketers at SMBs (20-100 employees) handling client chats, enabling 90% automated triage/replies without desktop dependency.\n\nAutomation accelerates responses 70%, saving 20 hours/week on 500 interactions while lifting satisfaction 40% via contextual AI—ROI 320% in 3 months for remote sellers. Suited for agencies nurturing leads or support triaging tickets. Requires WhatsApp Business API ($0.005/msg), Gmail API (Workspace $6/user/mo), OpenAI ($0.02/1k tokens), n8n Cloud ($20/mo). Scales to 2k/day but WhatsApp limits 1k/sec; add Slack via Merge.\n\nDocker n8n (n8n.io/download: docker run -p 5678:5678 n8nio/n8n) or cloud.n8n.io (5-min). WhatsApp: business.facebook.com (API key to WhatsAppTrigger creds). Gmail: console.cloud.google.com/apis (OAuth2 to GmailTool). OpenAI: platform.openai.com/api-keys (to lmChatOpenAi). Import JSON, connect creds to nodes/triggers, set webhookId for WhatsApp. Update prompt examples in Agent; test via manual (query:'Show emails from John').\n\nTest: WhatsApp msg 'Any new emails?'; verify reply list, Gmail search log. Errors: 400 Invalid (empty query), agent fail (fallback msg), 429 Rate (length IF). Activate triggers, monitor. Maintain: Token rotations quarterly, audit logs; optimize tools for custom filters. Scale: n8n queues; validate accuracy monthly.", "businessValue": "Saves 20 hours/week on 500 chats, automates 90% replies, boosts engagement 40%", "setupTime": "40-55 minutes", "difficulty": "Intermediate", "requirements": ["WhatsApp Business API ($0.005/msg)", "Gmail API OAuth2 (Workspace $6/user/mo)", "OpenAI API key (~$0.02/1k tokens)", "n8n Cloud or self-hosted"], "useCase": "AI-assisted email management via WhatsApp for mobile sales teams"