Decide Shopify return refunds with GPT-4o, Slack, and 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 9 nodes and runs when an HTTP POST request hits its webhook URL. Along the way it connects OpenAI, Slack and Google Sheets.
How it runs
Trigger: When an HTTP POST request hits its webhook URL.
- Fetch Order & Customer (HTTP Request): calls an HTTP API
- Compute Return Metrics (Code): runs custom JavaScript code
- AI Refund Decision (OpenAI): uses OpenAI
- Route by Decision (Switch): routes items into 2 branches
- Issue Refund (Shopify) (HTTP Request): calls an HTTP API (POST)
- Slack: uses Slack
- Log RMA to Sheets (Google Sheets): append
- Respond to Store (Respond to Webhook): sends the response back to the webhook caller
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 (8)
- Webhook
n8n-nodes-base.webhook - HTTP Request
n8n-nodes-base.httpRequest - Code
n8n-nodes-base.code - OpenAI
@n8n/n8n-nodes-langchain.openAi - Slack
n8n-nodes-base.slack - Google Sheets
n8n-nodes-base.googleSheets - Respond to Webhook
n8n-nodes-base.respondToWebhook - Switch
n8n-nodes-base.switch
From the author
Quick overview This workflow receives Shopify return/RMA requests via webhook, fetches order details from the Shopify Admin API, uses OpenAI (GPT-4o) to decide whether to approve, review, or deny the refund, then posts exceptions to Slack, logs all RMAs to…