Draft Gmail replies with Claude Sonnet and log decisions in Google Sheets
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 25 nodes and runs on Gmail events (plus 1 other trigger). Along the way it connects Gmail, Anthropic Chat Model and Google Sheets.
How it runs
Trigger: On Gmail events (plus 1 other trigger).
- Normalize Email Content (Code): runs custom JavaScript code
- Find Threads Labeled send-approved (Gmail): get many (message)
- Fetch Full Thread History (Gmail): get (thread)
- Extract Approved Thread IDs (Code): runs custom JavaScript code
- Build Conversation Transcript (Code): runs custom JavaScript code
- Read Pending Replies (Google Sheets): uses Google Sheets
- Set Business Profile (Edit Fields (Set)): sets 6 fields: business_name, tone, key_facts…
- Match Approved to Pending (Code): runs custom JavaScript code
- Process with Claude AI (Basic LLM Chain): sends a prompt to an LLM, with model: Claude Sonnet Model
- Send Approved Reply in Thread (Gmail): reply (message)
…plus 12 more steps. See the full node list below.
Services it uses
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 Trigger
n8n-nodes-base.gmailTrigger - Code
n8n-nodes-base.code - Gmail
n8n-nodes-base.gmail - Edit Fields (Set)
n8n-nodes-base.set - Basic LLM Chain
@n8n/n8n-nodes-langchain.chainLlm - Anthropic Chat Model
@n8n/n8n-nodes-langchain.lmChatAnthropic - If
n8n-nodes-base.if - Google Sheets
n8n-nodes-base.googleSheets - Schedule Trigger
n8n-nodes-base.scheduleTrigger
From the author
Quick overview This workflow monitors unread Gmail inbox messages, uses Anthropic Claude to decide whether a reply is needed and draft a response in your business voice, creates a Gmail draft in the original thread, and logs the email details and AI decision…