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Custom stack - Loops

Send every Custom stack event to Loops, server-side

Q: What permissions does the Loops API key need?

The key must have permission to write events and contacts, so Upstack can send events and create or update contacts.

Q: Which events does Loops receive?

ViewContent as Viewed Product, AddToCart as Added to Cart, InitiateCheckout as Started Checkout and Purchase as Placed Order.

Q: Which customer parameters are sent to Loops?

When Upstack identifies a visitor, it attaches the contact’s email and other known properties, and syncs profile properties including name, email and location to Loops.

Q: How do I check that Custom stack events are reaching Loops?

Trigger a test action on your store, such as viewing a product or adding to cart, and check Events in Loops. In Upstack, the Real-Time Events feed under System, Events Manager shows the events as delivered to Loops.

Each event is resolved to a person against a 750M+ device graph before it reaches Loops, so records and reporting reflect the person, not the device.

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US device IDs in the graph: 750M+
Match rate on events: 90%+
Identity window, per customer: Lifetime
Most brands are live: <20 min

How it flows

How a Custom stack event reaches Loops. Captured on the server, resolved to a person, then sent.

01 Capture

Captured from Custom stack

Not on the list? Send events to Upstack from any stack over webhook or direct post, with the same schema and the same resolution.

See the Custom stack integration

Custom stackWhat it sends

event_namewhatever you choose to call it
user identifiersany of email, phone, external ID
value / currencyif the event carries revenue
custom propertiesany attribute in your own schema

02 Understand

Resolved to one person before it leaves

Every Custom stack event is matched against a 750M+ device graph, so a phone browse and a desktop checkout resolve to one customer rather than two strangers.

How resolution works

Resolved before it is sent

IdentityMatched against a 750M+ device graph, so a phone browse and a desktop checkout resolve to one customer.
customer_typeNew or returning, resolved before send.
DeduplicationOne person, one record, across devices and identifiers.
Bot and fraud filteringAutomated traffic never becomes a contact.

A CRM is only as trustworthy as its worst duplicate. These controls exist so the record reflects the person.

03 Activate

Delivered to Loops

Send resolved customer events to Loops for lifecycle messaging.

See the Loops integration

LoopsWhat it receives

emailcontact key
event namewhat the lifecycle message reacts to
data variablespersonalization

Which events reach Loops

Each Upstack event is mapped to the Loops event below before it is sent.

Upstack event	Sent to Loops as	Key data on the event
Product view	Viewed Product	ProductName, ProductID, Price, ImageURL
Add to cart	Added to Cart	ProductName, ProductID, Price, Quantity, CartValue
Checkout	Started Checkout	CartValue, ItemCount, CheckoutURL
Purchase	Placed Order	OrderID, Revenue, Items, DiscountCodes

When Upstack identifies a visitor, it attaches the contact’s email and other known properties, and syncs profile properties including name, email and location to Loops.

The catch

Without a canonical person ID, a custom event stream produces a contact per identifier rather than a contact per person.

Where to check in LoopsRecords you can audit

Loops the contact's event history

What changes

What changes when Custom stack feeds Loops. Two gains on the Loops side, two on the Custom stack side.

Loops

Server-side delivery

Upstack sends events to Loops from its servers only, so ad blockers and browser privacy settings can’t block delivery.

Loops

Identity-resolved events

Events sent to Loops carry the resolved customer whenever Upstack can identify one, matched against a 750M+ device graph.

Custom stack

Any stack, any framework

Headless, custom checkout, native app or a platform we haven’t listed: if it can make an HTTP request, it can send to Upstack.

Custom stack

The same event schema

Custom events are resolved, filtered and forwarded exactly like a Shopify order.

Setup

Post directly from your backend so nothing depends on the browser.

You need a Loops account where you can create an API key with write access to events and contacts.

Upstack dashboardExample

Custom stack Data source Connected

Loops Destination Healthy

Read the full Loops setup guide

01

Connect Custom stack

Not on the list? Send events to Upstack from any stack over webhook or direct post, with the same schema and the same resolution.
02

Add the Loops destination

Under Destinations, add Loops with an API key created under Settings, API in your Loops account. It is the only credential the destination needs.
03

Check events in Loops

Trigger a test action on your store, such as viewing a product or adding to cart, and check Events in Loops. In Upstack, the Real-Time Events feed under System, Events Manager shows the events as delivered to Loops.

FAQ

Questions about Custom stack and Loops.

What permissions does the Loops API key need?

The key must have permission to write events and contacts, so Upstack can send events and create or update contacts.

Which events does Loops receive?

ViewContent as Viewed Product, AddToCart as Added to Cart, InitiateCheckout as Started Checkout and Purchase as Placed Order.

Which customer parameters are sent to Loops?

When Upstack identifies a visitor, it attaches the contact’s email and other known properties, and syncs profile properties including name, email and location to Loops.

How do I check that Custom stack events are reaching Loops?

Trigger a test action on your store, such as viewing a product or adding to cart, and check Events in Loops. In Upstack, the Real-Time Events feed under System, Events Manager shows the events as delivered to Loops.