Compose reply draft in Gmail with OpenAI assistant
Ready for 3.0Ready for 3.0. This template uses no nodes that n8n 3.0 removes. No removed nodes, versions or helpers found. Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 13 nodes and runs on a schedule (every minute). Along the way it connects Gmail and OpenAI. It also calls googleapis.com over HTTP.
How it runs
Trigger: On a schedule (every minute).
- Get threads with specific labels (Gmail): work with thread
- Loop over threads (Loop Over Items (Split in Batches)): loops over the items in batches
- Get single message content (Gmail): get
- Get thread messages (Gmail): get (thread)
- Ask OpenAI Assistant (OpenAI): work with assistant
- Return last message in thread (Limit): keeps the first few items
- Map fields for further processing (Edit Fields (Set)): sets 5 fields: response, threadId, to…
- Convert response to HTML (Markdown): converts between Markdown and HTML
- Build email raw (Edit Fields (Set)): sets 1 field: raw
- Convert raw to base (Code): runs custom JavaScript code
…plus 2 more steps. See the full node list below.
Services it uses
HTTP calls to: googleapis.com
Before you upgrade to n8n 3.0
Nothing in this workflow is removed in n8n 3.0, so it should import and run after the upgrade.
Nodes used (9)
- Gmail
n8n-nodes-base.gmail - HTTP Request
n8n-nodes-base.httpRequest - Code
n8n-nodes-base.code - Edit Fields (Set)
n8n-nodes-base.set - Markdown
n8n-nodes-base.markdown - OpenAI
@n8n/n8n-nodes-langchain.openAi - Limit
n8n-nodes-base.limit - Loop Over Items (Split in Batches)
n8n-nodes-base.splitInBatches - Schedule Trigger
n8n-nodes-base.scheduleTrigger
From the author
This workflow uses OpenAI Assistant to compose draft replies for labeled email messages. It automatically connects the drafts to Gmail threads. 💡 You can add knowledge base to your OpenAI Assistant and make your reply drafts very customized (e.g. compose…