n8n After-Hours WhatsApp Support Agent with OpenAI & Google Calendar

Answer WhatsApp questions after hours with an OpenAI agent + Google Calendar inside n8n

This n8n workflow automatically listens for incoming NUACOM WhatsApp messages, checks whether it’s outside business hours (Europe/Dublin), and—when appropriate—responds with an OpenAI-powered agent that can also manage appointments via Google Calendar. If the customer requests a human, it can hand off the chat to a NUACOM group for follow-up.

What this workflow does

• Triggers on NUACOM WhatsApp messages and normalizes key fields (sender number, message text, message ID).
• Filters to only process messages sent to your configured WhatsApp receiver number (optional: adjust or remove the filter).
• Checks business hours using the current time in Europe/Dublin against configured opening/closing times.
• If outside hours, assigns the conversation to a designated NUACOM AI user and sends the message (including recent conversation context) to an OpenAI chat model.
• The agent answers by first querying an n8n Data Table knowledge base, and can check, book, reschedule, or cancel appointments by calling Google Calendar.
• If the customer explicitly agrees to a human handoff, the workflow assigns the conversation to a designated NUACOM human group.
• Sends the agent’s reply back over WhatsApp via NUACOM.

Use cases

• After-hours FAQs: pricing, services, and availability questions answered instantly.
• Appointment scheduling: customers book, reschedule, or cancel without waiting for business hours.
• Escalation: when a user asks for a person, the workflow hands the conversation to a human NUACOM team.

Technical details

• NUACOM WhatsApp trigger and messaging
• Time logic via if + configuration for Europe/Dublin business hours
• Data handling with set, filter, and no op where applicable
• OpenAI agent with an n8n Data Table knowledge base tool
• Google Calendar tools for appointment operations
• Conversation assignment for an AI user and optional NUACOM human group

Setup: add NUACOM API credentials, confirm WhatsApp is enabled on your NUACOM number, set assignees (AI user ID + human group), configure the receiver number filter, and set business hours/timezone.