User-list Management

The subject matter of the disclosure is embodied in a method that includes identifying a user-list which is based on owned or permissioned data, wherein the user-list is associated with a corresponding owner database. The method also includes providing an application programming interface (API) configured to communicate with the owner database, and receiving, from the owner database through the API, metadata related to the user-list. The metadata at least includes data describing a category for the user-list. The method further includes storing in a searchable database a user-list identifier corresponding to the user-list and the associated metadata, and providing a user-interface that includes the user-list identifier and the corresponding associated metadata. The user-interface is configured to receive one or more management instructions related to the user-list from a user-list subscriber.