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AI Email Auto Responder

Documentation for the automated n8n workflow handling customer inquiries and sending AI-generated email responses.

1 n8n Workflow Architecture

The application relies on an n8n webhook workflow to process incoming inquiries and dispatch responses. The workflow executes in the following sequence:

On Customer InquiryWebhook POST
→
Generate AI ResponsePOST: https://openrouter.ai...
→
Clean AI Outputmanual
→
Format to HTMLMarkdown to HTML
→
Email Response to Clientsend: message (Gmail)

2 Workflow Breakdown

Trigger & AI Generation

  • •
    On Customer Inquiry The frontend Vue application sends a POST request to the n8n Webhook node containing the user's email and message.
  • •
    Generate AI Response An HTTP Request node calls OpenRouter's Chat Completion API. The system prompt instructs the LLM to draft a helpful, professional response to the user's inquiry.

Formatting & Delivery

  • •
    Clean AI Output (Manual) A Code node or Mutate node manually parses the JSON response from OpenRouter and extracts only the assistant's message content.
  • •
    Format to HTML Since LLMs natively output Markdown, a Markdown-to-HTML formatting node ensures the email body renders correctly with bolding, lists, and links.
  • •
    Email Response to Client The Gmail node constructs an email utilizing the provided HTML and sends it directly back to the customer's original email address.