Coinbase says its x402 protocol has processed more than 160 million agentic payments over the past year, putting AI-driven stablecoin payments back in focus as Coinbase for Agents goes live. The same update put Coinbase’s stablecoin infrastructure at nearly $1 trillion in annual movement, with almost $20 billion in USDC held on the platform. Base has also processed about $19 trillion in stablecoin volume so far this year, giving Coinbase a payments stack that now spans exchange accounts, developer tools, Base settlement, USDC liquidity and agentic payment rails.