Base, the layer-1 blockchain of Coinbase, the largest cryptocurrency exchange in the US, announced via its official X (formerly Twitter) account that "the cumulative stablecoin payment volume within the x402 protocol exceeded $100 million in the first quarter." The x402 protocol is a project led by Coinbase, advocating an open AI payment standard and supporting payments between AI agents. In this regard, Base added, "Over 90% of AI agents' on-chain stablecoin transactions occur on Base."