SEALCOIN is a decentralized machine-economy platform that enables IoT devices, AI agents, and connected infrastructure to autonomously authenticate, exchange data, and settle payments without human intervention. Built on Hedera DLT and powered by the QAIT token, the platform combines decentralized transactions, hardware-based identity, smart contracts, satellite connectivity, and post-quantum security. SEALCOIN focuses on real-world machine-to-machine (M2M) economies, supporting use cases such as energy trading, data marketplaces, autonomous AI agents, smart cities, and satellite-enabled transactions within a secure DePIN ecosystem.