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Goal of this course. Rebuild this workflow manually, node by node, live on camera. Every value, prompt, expression and JSON schema below is copy-paste ready, so you never have to open the finished workflow while filming.

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What we are building

An AI customer-support agent on WhatsApp that reads your own website live to answer. No document upload, no vector store, no fine-tuning. When a page of your site changes, the answer changes with it.

Three things make this version different from a classic "website chatbot":

Zero paid dependency. The crawling is done by two native n8n HTTP Request Tool nodes, not by an external scraping service.
Structured output. The agent does not just return text. It returns answer, needs_human, sentiment, topic and sources.
Human escalation. Complaints, refunds and "I don't know" cases are emailed to the support team instead of being hallucinated.

Flow diagram

flowchart TD
    A["Receive WhatsApp message"] --> B["Configuration"]
    B --> C{"Is a text question?"}
    C -->|"false"| D["Ignore non-text updates"]
    C -->|"true"| E["Website Support Agent"]
    E --> F{"Needs a human?"}
    F -->|"true"| G["Alert the support team by email"]
    F -->|"false"| H["Send the answer on WhatsApp"]
    G --> H
    H --> I["Log the conversation in Google Sheets"]
    J["OpenAI Chat Model"] -.-> E
    K["Conversation Memory"] -.-> E
    L["list_links"] -.-> E
    M["get_page"] -.-> E
    N["Answer Parser"] -.-> E
    O["Output Fixer Model"] -.-> N

Prerequisites and credentials

Credential	Type	Where to get it
WhatsApp OAuth account	whatsAppTriggerApi	Meta for Developers → your app → App settings → Basic. Copy App ID and App Secret. ⚠️ There is no verify token field: n8n verifies Meta's challenge automatically on activation.
WhatsApp account	whatsAppApi	Meta for Developers → WhatsApp → API Setup. Copy the permanent access token and note the Phone Number ID.
OpenAi account	openAiApi	platform.openai.com → API keys → Create new secret key.
Gmail account	gmailOAuth2	Google Cloud Console → OAuth client. Or use the n8n OAuth flow directly.
Google Sheets account	googleSheetsOAuth2Api	Same Google Cloud project, Sheets API enabled.

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The two crawler tools (list_links, get_page) need no credential at all. They read public pages of your website with a plain GET request.

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