Speed is a Lightning Network-based payment infrastructure designed for AI agents and the machine economy. It enables instant receipt, payment, and global settlement of Bitcoin and stablecoins, with settlement in under 3 seconds and no fraud risk. Through API integration, AI agents or businesses can automate payments, receive funds, and conduct cross-border transfers without traditional bank accounts. Its mechanism leverages Lightning Network for cryptographic finality and supports multiple currencies, suitable for high-frequency, low-value automated transactions.