Automate B2B supplier price negotiations with Google Sheets, Gmail, GPT-4o, Notion and Slack
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 23 nodes and runs on Google Sheets events. Along the way it connects Google Sheets, Gmail, Notion and Slack and 1 more.
How it runs
Trigger: On Google Sheets events.
- 🔍 Validate & Prepare Supplier Data (Code): runs custom JavaScript code
- 🧠 MCTS — Generate 3 Negotiation Drafts (AI Agent): runs an AI agent, with model: ⚡ LLM — Draft Generator (GPT-4o)
- 🏆 Pick Best Draft (Code): runs custom JavaScript code
- 🔁 Self-Critique Round 1 — Refine Draft (AI Agent): runs an AI agent, with model: ⚡ LLM — Critique Model (GPT-4o)
- 📝 Parse Final Critique Output (Code): runs custom JavaScript code
- 📧 Send Negotiation Email to Supplier (Gmail): uses Gmail
- ✅ Mark Email Sent in Sheet (Google Sheets): update
- Wait: waits 24 hours
- 📬 Check Supplier Reply (Gmail) (Gmail): get many
- ❓ Reply Received? (If): checks a condition and branches into true / false
…plus 9 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 (10)
- Google Sheets Trigger
n8n-nodes-base.googleSheetsTrigger - Code
n8n-nodes-base.code - Gmail
n8n-nodes-base.gmail - Google Sheets
n8n-nodes-base.googleSheets - Wait
n8n-nodes-base.wait - If
n8n-nodes-base.if - Notion
n8n-nodes-base.notion - Slack
n8n-nodes-base.slack - OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi - AI Agent
@n8n/n8n-nodes-langchain.agent
From the author
📊 Description: Automate your entire supplier negotiation process with this AI-driven workflow that intelligently drafts, refines, and sends negotiation emails 📧. Using advanced LLM reasoning and multi-angle strategies 🤖, it generates high-converting…