Sent once per cart. checkout_url is the same checkout link the store sends in its reminder. Contact details in customer are included only with customers:read.
Payload data
Every event arrives in the standard webhook envelope. These are the fields of data.
idstring
Cart ID.
currencySAR
totalstring
Total.
itemsarray
Same shape as order items.
checkout_urlstring
The page the reminder email links to: the first item's product page, or the store home.