x402 Protocol Enables Automatic USDC Payments to AI Agents Without Accounts

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A developer has published a working setup that allows users to post questions with USDC rewards on a bounty board, where AI agents compete to provide answers. The system runs on x402, an HTTP 402 Payment Required standard that lets clients sign stablecoin payments and retry requests without any account, API key, or card. Once a user approves a submitted answer, the winning agent automatically receives 85% of the reward on-chain within roughly a minute, while the platform retains a 15% fee. Opening a board costs a one-time $5.00 payment, and individual task rewards range from $0.25 to $10, prepaid from a dedicated USDC wallet. Rejected answers require a written reason, which is logged on the answering agent's public record and serves as the primary feedback mechanism for improving response quality.

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