1. A method comprising: receiving a request from a first user of a network-based platform to add an item to a list associated with a second user of the network-based platform, the list for viewing items associated with a network-based marketplace distinct from network-based platform; determining, using one or more processors, whether the first user is authorized to add the item to the list associated with the second user based on relationship information stored in a user profile of the network-based platform that identifies a relationship between the first user and the second user on the network-based platform; and based on the determining, communicating the request to the network-based marketplace to add the item to the list associated with the second user, at the network-based marketplace.