n8n Gmail Smart Auto-Responder with GPT-4o and Google Drive Context Memory

This n8n workflow automates smart email responses using AI, leveraging Google Drive for contextual memory. It listens for new emails in Gmail, processes their content with an AI agent (likely GPT-4o, given the directory name hint), and generates a relevant response. The workflow is designed to provide intelligent, context-aware replies by utilizing a vector store and memory buffer for the AI.

What it does

This workflow performs the following steps:

1. Triggers on New Emails: Continuously monitors a specified Gmail account for new incoming emails.
2. Initial Data Processing: Extracts relevant information from the incoming email.
3. Loads Context from Google Drive: Retrieves contextual documents from Google Drive. These documents are likely used to provide background information to the AI for generating more informed responses.
4. Splits Documents for AI Processing: Uses a Recursive Character Text Splitter to break down the Google Drive documents into manageable chunks for the AI.
5. Embeds Document Chunks: Generates embeddings for the text chunks using OpenAI's embedding model, preparing them for storage in a vector store.
6. Stores Context in Vector Store: Populates a simple in-memory vector store with the embedded document chunks, making them searchable for the AI.
7. Initializes AI Memory: Sets up a simple memory buffer for the AI agent to maintain conversational context.
8. Generates AI Response: Uses an OpenAI Chat Model (likely GPT-4o, though the JSON specifies lmChatOpenAi) within an AI Agent to process the incoming email and the loaded context, generating a smart response.
9. Filters for Response: Includes a conditional check (If node) to potentially filter or route the AI's output based on certain criteria (e.g., if a response was generated).
10. Prepares Email for Sending: If a response is generated, it prepares the content for sending.
11. Sends Auto-Response via Gmail: Sends the AI-generated response back to the original sender using Gmail.

Prerequisites/Requirements

To use this workflow, you will need:

• n8n Instance: A running n8n instance.
• Gmail Account: A Google account with Gmail enabled for sending and receiving emails.
• Google Drive Account: A Google Drive account containing the contextual documents.
• OpenAI API Key: An API key for OpenAI to use the chat model (e.g., GPT-4o) and embeddings.
• Credentials: Configured n8n credentials for:
  • Gmail (OAuth2 or API Key)
  • Google Drive (OAuth2 or API Key)
  • OpenAI (API Key)

Setup/Usage

1. Import the Workflow: Download the workflow JSON and import it into your n8n instance.
2. Configure Credentials:
   • Set up your Gmail credentials for the "Gmail Trigger" and "Gmail" nodes.
   • Set up your Google Drive credentials for the "Google Drive" node.
   • Set up your OpenAI credentials for the "Embeddings OpenAI" and "OpenAI Chat Model" nodes.
3. Specify Google Drive Context: In the "Google Drive" node, configure which files or folders to use as context for the AI.
4. Customize AI Agent: Adjust the prompt and settings within the "AI Agent" node to tailor the AI's behavior and response style.
5. Activate the Workflow: Once configured, activate the workflow. It will start listening for new emails in your specified Gmail account and respond automatically.