Shareable content item links with use restrictions. In one embodiment, for example, a method comprises: receiving, from a client computing device used by an authenticated link submitter, a first request to access a server-stored content item at a shareable link; wherein the link submitter is authenticated according to a first authentication factor; responsive to receiving the first request, prompting the link submitter to enter/submit a second authentication factor; and providing access to the server-stored content item at the shareable link responsive to receiving the second authentication factor from the link submitter.