Machine Xchange Coin (MXC) provides a unique distributed 'Internet of Things data trading network' for the global token economy. IoT data can be shared on a large scale while ensuring complete end-to-end privacy. The MXC Foundation is committed to the research and application of low-power Wide Area Internet of Things (LPWAN) and blockchain technology. The MXProtocol polar domain protocol is the core of MXC, a fully decentralized standard protocol based on LPWAN, which solves the following problems: 1. Resolve free frequency band IoT conflicts through ACC; 2. Solve the problem of resource allocation for LPWAN IoT downlink through intelligent bidding technology; 3. Solve the problem of cross chain transactions and services for IoT data through cross chain data markets.Machine Xchange Coin is the first cryptocurrency used to connect existing IoT devices, which can be used to reward network participants, pay service fees, and conduct transactions....