Draft and approve Gmail replies with OpenAI and CustomJS
UnknownUnknown. This template uses community nodes we can't verify statically. Uses community nodes that can't be verified statically (unverified community packages are off by default in 3.0). Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 11 nodes and runs manually, when you click “Execute workflow” (plus 1 other trigger). Along the way it connects Gmail, OpenAI and Pdf Toolkit V2 (community).
How it runs
Trigger: Manually, when you click “Execute workflow” (plus 1 other trigger).
- Get many messages (Gmail): get many
- Extract Reply Data (Code): runs custom JavaScript code
- Filter No Reply Emails (Code): runs custom JavaScript code
- Reply to a message (Gmail): reply
- Generate AI Draft Reply (OpenAI): uses OpenAI
- Mark a message as read (Gmail): mark as read
- Format Email Drafts (Code): runs custom JavaScript code
- Build Approval Page (Code): runs custom JavaScript code
- Upsert Approval Page (Pdf Toolkit): create or update (page)
Services it uses
Before you upgrade to n8n 3.0
We can't fully verify this one: it relies on 1 community package, and n8n 3.0 turns unverified community packages off by default (N8N_UNVERIFIED_PACKAGES_ENABLED=false).
- Check that @custom-js/n8n-nodes-pdf-toolkit-v2 is verified or supports 3.0 (used in Upsert Approval Page).
Nodes used (6)
- Manual Trigger
n8n-nodes-base.manualTrigger - Pdf Toolkit
@custom-js/n8n-nodes-pdf-toolkit-v2.pdfToolkit - Gmail
n8n-nodes-base.gmail - Webhook
n8n-nodes-base.webhook - Code
n8n-nodes-base.code - OpenAI
@n8n/n8n-nodes-langchain.openAi
From the author
Quick Overview This workflow pulls unread Gmail messages, generates draft replies with OpenAI, and publishes an approval dashboard via CustomJS. When you approve or edit a draft in the dashboard, it posts back to a webhook that sends the reply in Gmail and…