This page documents all URL parameters available for dynamic links.

Line Items (li)

Add products to the cart using variant IDs.

Format:

?li=VARIANT_ID:QUANTITY

Multiple items (comma-separated):

?li=VARIANT_ID_1:QUANTITY_1,VARIANT_ID_2:QUANTITY_2

With selling plan (for subscriptions):

?li=VARIANT_ID:QUANTITY:SELLING_PLAN_ID

With attributes (in brackets, multiple separated by colon):

?li=VARIANT_ID:QUANTITY[KEY,VALUE:KEY,VALUE]

Examples:

?li=12345678:1 ?li=12345678:2,87654321:1 ?li=12345678:1:99999999 ?li=12345678:1[gift_message,Happy Birthday]

Customer (c)

Pre-fill customer information at checkout.

Shopify Customer ID:

?c=SHOPIFY_CUSTOMER_ID

Klaviyo Customer ID:

?c=klaviyo:KLAVIYO_PROFILE_ID

Inline customer data:

?c=[email,[email protected]:firstName,John:lastName,Doe]

Available inline fields:

• email

• firstName

• lastName

• address1

• address2

• city

• province (state/province code)

• zip

• country (country code)

• phone

Example with full address:

?c=[email,[email protected]:firstName,John:lastName,Doe:address1,123 Main St:city,New York:province,NY:zip,10001:country,US]

Cart Attributes (attr)

Attach key-value pairs to the order.

Format:

?attr=[KEY,VALUE]

Multiple attributes (comma-separated):

?attr=[KEY_1,VALUE_1:KEY_2,VALUE_2]

Example:

?attr=[source,instagram:campaign,spring2026]

Cart Note (note)

Add a note to the order.

Format:

?note=Your note text here

Example:

?note=Gift order - please wrap

Combining Parameters

You can combine any parameters using &:

?li=12345678:2&c=[email,[email protected]]&attr=[source,email]&note=Reorder

URL Encoding

Remember to URL-encode special characters in your parameter values:

Most email and SMS platforms handle URL encoding automatically when using merge tags.