OptiCG does not collect, store, or transmit any personal data to any
server. All processing — reading your cart, fetching current listing data, and solving for the cheapest combination of sellers — happens entirely locally in your browser. Network requests are made only to TCGPlayer's own domains (www.tcgplayer.com, mp-search-api.tcgplayer.com, mpapi.tcgplayer.com, mpgateway.tcgplayer.com) to read current listings and, only when you explicitly click "Update Cart," to apply your cart changes — the same requests TCGPlayer's own website makes when you use its built-in features. No analytics, tracking, or third-party services are used. No data ever leaves your browser except to TCGPlayer itself.