Handle Gmail reply-based scheduling with Google Calendar and GPT-4o-mini
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 17 nodes and runs when an HTTP POST request hits its webhook URL (plus 1 other trigger). Along the way it connects OpenAI, Google Calendar and Gmail.
How it runs
Trigger: When an HTTP POST request hits its webhook URL (plus 1 other trigger).
- Sample Input (Edit Fields (Set)): sets 2 fields: text, timezone
- Normalize Incoming Reply (Edit Fields (Set)): sets 3 fields: reply_text, from_email, thread_id
- Message a model (OpenAI): uses OpenAI
- Check Selected Option (1 or 2) (If): checks a condition and branches into true / false
- Prepare Calendar Payload (Edit Fields (Set)): sets 3 fields: title, start_datetime, end_datetime
- Prepare Confirmed Slot Data (Edit Fields (Set)): sets 5 fields: selected_option, chosen_start, chosen_end…
- Prepare Alternative Request (Edit Fields (Set)): sets 2 fields: is_valid_reply, reply_reason
- Get availability in a calendar (Google Calendar): work with calendar
- Is Valid Confirmation (If): checks a condition and branches into true / false
- If: checks a condition and branches into true / false
…plus 5 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.
- Still check Gmail Trigger below v1.4 runs as v1.4 (drafts skipped, max emails per poll) (Gmail Trigger (User Reply)).
Nodes used (7)
- Webhook
n8n-nodes-base.webhook - Edit Fields (Set)
n8n-nodes-base.set - OpenAI
@n8n/n8n-nodes-langchain.openAi - Google Calendar
n8n-nodes-base.googleCalendar - If
n8n-nodes-base.if - Gmail Trigger
n8n-nodes-base.gmailTrigger - Gmail
n8n-nodes-base.gmail
From the author
Reply Handling (Optional Extension) This optional workflow handles email replies after availability options have been sent. It extends the main scheduling flow by enabling two-way, email-based confirmation. What this extension does Listens for user replies…