Coinbase is deploying AiFi, a financial infrastructure for autonomous AI agents based on the x402 protocol and the USDC stablecoin. The x402 protocol has surpassed 100 million transactions since its launch in May 2025 and is now under the Linux Foundation with support from Circle, Google, Microsoft, Stripe and Visa. Coinbase relies on Base, its layer 2 on Ethereum, to process USDC payments without gas fees. The ecosystem is growing with partnerships such as the one with AWS and tools like Coinbase for Agents, but questions remain open regarding legal liability and security risks. The proportion of x402 transactions exceeding one dollar rose from 49% in early 2025 to 95% in early 2026.
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