# Send Shopify back-in-stock waitlist waves with WhatsApp, Gmail, Sheets and Slack

> Quick overview This workflow collects back-in-stock waitlist signups for Shopify product variants, stores them in Google Sheets, and sends FIFO restock notifications in stock-based waves via WhatsApp Business Cloud or Gmail with time-limited Shopify discount codes, then posts wave summaries to Slack and marks conversions when Shopify orders. How it works 1. Receives a POST webhook from your product page with a shopper’s variant ID, contact details, channel preference, and consent. 2. Looks up the product variant in Shopify and checks Google Sheets to validate consent/contact info, detect duplicates, and decide whether to join the waitlist, return an “in stock” message, or reject the request. 3. Appends valid signups to a Google Sheets waitlist and sends a confirmation message via WhatsApp Business Cloud or Gmail, then returns the shopper’s queue position in the webhook response. 4. Triggers on Shopify inventory level increases and on an hourly schedule to find variants with waiting sho

- **Domain**: `n8n-workflow-21510.n8n.io`
- **Provider**: n8n.io (https://n8n.io)
- **Kind**: workflow
- **Live-responds (last probe)**: None
- **Signed card**: False
- **Streaming**: False
- **Quality score**: 40%

## URLs
- Agent card: https://n8n.io/workflows/21510
- Page (HTML): https://agenstry.com/agents/n8n-workflow-21510.n8n.io
- Documentation: https://n8n.io/workflows/21510