Send Wishlist Item Back in Stock Event to Mailchimp
Use this Shopify Flow template to automatically notify shoppers when an item on their wishlist comes back in stock. When a product's inventory increases from zero, the workflow automatically checks for any shoppers who have added that specific product to their Wysh wishlist, and instantly sends a Mailchimp event to each of them.
This creates a highly relevant, automated touchpoint that instantly alerts high-intent buyers the moment their favorite items are available for purchase again.
Before you start
Wysh must be installed and active on your Shopify store.
Shopify Flow must be available on your store so you can import and edit the workflow.
Mailchimp must be connected directly to your Shopify store so Shopify Flow can seamlessly pass data to your Mailchimp account.
Inventory tracking must be enabled for your products within Shopify so Shopify Flow can accurately read stock increases.
The template connects your restocked inventory directly with customer wishlists. Once the back-in-stock event is being sent successfully, you can use it in Mailchimp to trigger automated back-in-stock customer journeys.
Install the workflow
Download the template, extract the file, and then import it into Shopify Flow.
Download the ZIP folder using the link above, then extract (unzip) it on your computer to get the .flow file.
In your Shopify admin, open Shopify Flow.
Choose the option to import a workflow, then upload the extracted .flow file.
After import, confirm that the workflow includes the inventory quantity trigger, the Wysh wishlist loop check, and the Mailchimp event action step.
Customize the workflow
After importing the template, review and update the workflow settings before turning it on.
Confirm the event name: The default event name sent to Mailchimp is
Wishlist item back in stock. Keep it as-is or rename it if you want to organize events differently in Mailchimp.Review the event details: Make sure the event includes the shopper and product information you want available in Mailchimp so your restock email can display the correct product imagery, title, and price details.
Verify stock rules: Ensure the workflow triggers only when inventory goes from 0 to greater than 0, preventing accidental alerts during normal inventory adjustments or manual counting corrections.
When building your back-in-stock automated customer journey in Mailchimp, include a clean, highly visible product callout that drives customers directly back to your storefront product page to speed up conversions.
Turn it on
After verifying your workflow conditions and parameters, save the workflow in Shopify Flow.
Turn the workflow on so it can start monitoring your store for product restocks and matching them to customer wishlists.
Find a product currently saved to a test customer's wishlist, set its inventory to 0, then increase it back to 1 or more in your Shopify admin. Confirm the workflow loops through the customers and fires the event to Mailchimp.
If the workflow is not turned on, back-in-stock events will pass unmonitored, and your shoppers will not receive automatic updates when items return to stock.
What this workflow does
Once enabled, the workflow watches for an inventory quantity change where a product variant goes from out-of-stock back into stock. When this restock occurs, the flow scans active Wysh data to identify every customer who has that exact product saved to a wishlist. It then loops through those customers, sending an individual Wishlist item back in stock event to Mailchimp for each one—giving you the precise trigger needed to capture high-intent recovery revenue.