Cointime update: Coinbase’s x402 protocol revives the web’s long-unused HTTP 402 status code, enabling AI agents and applications to pay for APIs and data in stablecoins such as USDC. The protocol repurposes the 402 “Payment Required” response as a machine-readable payment request, so autonomous software can settle API and data access directly on-chain. Coinbase has positioned x402 as payment infrastructure for an agent-driven web.
Coinbase’s x402 Uses HTTP 402 Code for AI Agent Stablecoin Payments
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