Custom Data Sources

Bring additional data into your Littledata events using Shopify metafields and browser data.

Custom Data Sources let you enrich events with Shopify metafields and browser data.

Use them when the default Shopify event payload is not enough.

Why use Custom Data Sources?

• Send a product material metafield to GA4.

• Use a customer loyalty_tier metafield in Klaviyo.

• Capture a cookie or local storage value for event enrichment.

Set up Custom Data Sources

1

Configure metafields

Go to Settings → Custom Data Sources.

You will see Customers, Products, and Product Variants.

Littledata discovers available namespaces and keys automatically.

Select the metafields you want to expose in mappings.

2

Configure browser data

In Browser data, add the cookie keys or local storage keys you want.

The Littledata tracking pixel will collect those values on supported events.

3

Use the fields in mappings

After setup, these fields appear in the source dropdown of the mapping editor.

If new metafields do not appear yet, use Refresh metafields.

Supported metafield types

Owner type	Shopify object	Available on events
Products	Product metafields	product_viewed, add_to_cart, order events
Product variants	Variant metafields	Order events, add_to_cart
Customers	Customer metafields	Order events, customer events

Browser data

Browser data is collected by the Littledata tracking pixel on client-side events.

Supported sources are Cookies and Local storage.

Browser data is only available on client-side events, such as page_view and add_to_cart.

Refresh metafields

1

Start a refresh

Go to Custom Data Sources and click Refresh metafields.

2

Wait for discovery

Littledata starts a new bulk operation.

New metafields usually appear within a few minutes.