Automate Gmail Reply Drafts with OpenAI Assistant

This workflow triggers on labeled Gmail emails, uses OpenAI Assistant to generate smart reply drafts, and attaches them to threads automatically. Saves time on routine email responses with customizable AI knowledge.

n8n
Automate Gmail Reply Drafts with OpenAI Assistant

This n8n workflow automates the creation of reply drafts in Gmail using an OpenAI Assistant. It runs on a schedule (default every 1 minute), checks for emails with a specific label like 'AI', retrieves the message content, and sends it to the OpenAI Assistant to generate a tailored reply. The response is converted to HTML, formatted into a raw RFC-compliant email message, and created as a draft linked to the original thread. Finally, the trigger label is removed to avoid loops.

Key benefits include massive time savings for sales teams or support handling high-volume emails, customizable replies via OpenAI knowledge bases (e.g., product info for customer inquiries), and seamless Gmail integration without leaving your inbox. It's ideal for sales automation, customer service, or any scenario needing quick, intelligent responses.

Use cases: Label incoming sales leads or inquiries, let AI draft personalized replies with pricing or demos; automate follow-ups; integrate with CRM by replying contextually. Setup is straightforward: configure Gmail/OpenAI credentials, create a label, select your Assistant, and adjust the interval. Watch the linked YouTube demo for visuals.

$14.99
Last updated October 3, 2026
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How to import this workflow into n8n

  1. 1Purchase or download the workflow to get the n8n workflow JSON file.
  2. 2In your n8n instance, open Workflows and choose "Import from File" (or paste the JSON with Ctrl+V on the canvas).
  3. 3Open each node marked with a credential warning and connect your own accounts and API keys.
  4. 4Run the workflow once manually to verify the data flow, then toggle it to Active.

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