In the last two years, machines generate more information than humans. We believe that, in the near future, the same will apply to transactions. This can't work unless we trust our devices (our autonomous cars, our smart fridges, our smart electricity meters) to transact in our best interests. To do that, we have to replace the existing transaction model that gives all the power to the seller, to one based on agency: The seller's side of the transaction is represented by a seller algorithm, the buyer's side of the transaction is represented by a buyer algorithm. Each side represents its own best interest, and we achieve a trustworthy, negotiated endpoint: a platform on which to build the future of autonomous transactions.