Flow Triggers Reference

Every Shopify Flow trigger published by Fish Wishlist, when it fires, and the fields it makes available to your workflow.

Fish Wishlist publishes nine triggers to Shopify Flow. Search for wishlist in the Flow trigger picker to find them all.

Every trigger includes an Event ID field — a unique identifier for that individual event. It's mainly useful for de-duplication if you're forwarding events to an external system.

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Product triggers

Product Added to Wishlist

Fires the moment a customer saves a product variant to any of their wishlists. This is the most commonly used trigger.

Field	Type	Notes
Customer	Customer	Full Shopify customer reference
Product	Product	Full Shopify product reference
Variant ID	Text	The specific variant the customer saved
Wishlist ID	Text	Which list it was saved to — see Wishlist IDs
Wishlist title	Text	The customer-facing name of the list
Event ID	Text	Unique ID for this event

Good for: tagging high-intent customers, "still thinking about it?" reminder emails, pushing an event to your ESP.

Product Removed from Wishlist

Fires when a customer removes a saved product from a wishlist. Carries the same fields as Product Added to Wishlist.

Good for: cancelling a reminder sequence, removing a tag or segment membership so you stop marketing an item the customer no longer wants.

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Alert triggers

These two triggers power the alerts merchants ask for most. Both need a little more care than the others — read Set Up Wishlist Alerts for the full walkthrough.

Wishlist Product Back in Stock

Fires when a product variant sitting on a customer's wishlist comes back into stock. One event is sent per customer who has that variant saved.

Field	Type	Notes
Customer	Customer	The customer waiting on the item
Product	Product	The product that restocked
Variant ID	Text	The variant that restocked
Event ID	Text	Unique ID for this event

Fish Wishlist only listens for restocks while you have a live workflow using this trigger. Turning the workflow off stops the tracking, and turning it back on resumes it. Restocks that happen while no workflow is on are not backfilled.

Wishlist Product Price Drop

Fires when the price of a variant on a customer's wishlist falls below the price we last recorded for it. One event is sent per customer who has that variant saved.

Field	Type	Notes
Customer	Customer	The customer who saved the item
Product	Product	The product whose price dropped
Variant ID	Text	The variant whose price dropped
Wishlist ID	Text	Which list the item is on
Wishlist title	Text	The customer-facing name of the list
Old price	Decimal	The price we previously recorded
New price	Decimal	The current, lower price
Currency	Text	Reserved; read the price from product if needed
Event ID	Text	Unique ID for this event

Price drops are detected by a scheduled check that runs once an hour, so these events arrive within the hour rather than instantly. Your baseline prices are recorded the first time you turn on a workflow using this trigger — see Set Up Wishlist Alerts.

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Wishlist triggers

Wishlist Created

Fires when a customer creates a new wishlist. On stores using multiple wishlists per customer this fires each time they add a list; on single-wishlist stores it fires once, the first time they save anything.

Field	Type
Customer	Customer
Wishlist ID	Text
Wishlist title	Text
Event ID	Text

Good for: a welcome email explaining how the wishlist works, or tagging first-time wishlist users.

Wishlist Removed

Fires when a customer deletes one of their wishlists. Carries the same fields as Wishlist Created.

Shared Wishlist Created

Fires when a customer shares a wishlist using the share feature.

Field	Type	Notes
Customer	Customer	The customer doing the sharing
Wishlist ID	Text	Which list was shared
Wishlist title	Text	The customer-facing name of the list
Shared Wishlist URL	Text	The public link to the shared list
Shared Wishlist items	Text	The contents of the list, as JSON — see below
Event ID	Text	Unique ID for this event

Flow trigger fields can't hold lists, so the items travel as a JSON string: an array of objects with product_id, variant_id, product_title and variant_title. Pass it straight through to an external service in a Send HTTP request action, where it can be parsed.

Good for: emailing the customer their share link, or sending the full list contents to an email platform for a gift-guide campaign.

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Collection triggers

Collection Added to Wishlist

Fires when a customer saves a whole collection to their wishlist.

Field	Type
Customer	Customer
Collection ID	Text
Collection title	Text
Collection handle	Text
Event ID	Text

Shopify Flow only supports full references for customers, orders and products, so collections arrive as plain text fields rather than a collection reference.

Collection Removed from Wishlist

Fires when a customer removes a saved collection. Carries the same fields as Collection Added to Wishlist.

Good for: category-level interest signals — segmenting customers by the collections they follow.

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Wishlist IDs

The Wishlist ID field holds an internal identifier in the form WL1, WL2, and so on. WL1 is the customer's default wishlist. Two IDs are managed by the app rather than the customer:

ID	Wishlist
WL11	Abandoned Cart
WL12	Previously Purchased

If a workflow should only respond to lists the customer built themselves, add a Flow condition checking that Wishlist ID is not WL11 or WL12.