Freedom of Information Acts (FOIAs) aim to provide a channelled exchange between citizens and public officials that, irrespective of the citizen's identity, results in the provision of timely, relevant, and often new information about policy. We evaluated Mexico's FOIA by submitting 307 information requests on behalf of an average male citizen to government entities in the years 2007, 2013, and 2015. In 2007, we also submitted the same requests to 87 comparable entities on behalf of a male citizen who signalled economic and political clout. Encouragingly, entities do not discriminate between regular and seemingly influential citizens. Entities also answer more frequently and provide more information in 2015 compared to earlier years, but they are taking longer to answer, frequently charging fees, and often failing to provide quality information to questions they are legally bound to answer. Mexico's FOIA is a functional system demanding significant improvements.