Platform Accountability and Transparency Act

This bill establishes a framework for researchers to access certain data from large social media platforms for academic research. It requires platforms with at least 50 million monthly U.S. users to provide "qualified data" to approved researchers under strict privacy and security safeguards, after review by the National Science Foundation and Federal Trade Commission. The bill also mandates platforms to publicly disclose information about content dissemination, advertising, algorithms, and content moderation practices through searchable, real-time repositories. Researchers must use the data only for noncommercial public-interest research and cannot identify individual users, while platforms gain legal immunity for complying with these requirements.