HATDeX is the operational arm of the HAT Foundation and the organisation behind the clearing and settlement of data transactions and exchanges between HATs, HAT Providers, and HAT Applications. It implements the HAT standard for the fair trade of data between individuals and organisations through the automated, real-time, on-demand and consent-based Data Debit mechanism. It logs all activities in the HAT ecosystem, responds to HAT requests to create Data Debits, installs Data Plugs, holds data transactions, verifies exchanges, and quickly, accurately and securely sends and receives data between parties. It reports ecosystem statistics as well as integrating datasets and dataKey services for third parties into the system. HATDeX operates 3 main technologies – HAT technology, DEX technology, and the Milliner service.