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Techub News: Coinbase Developer Platform (CDP) officially launches SQL API supporting x402 payments. This API allows AI agents to access index data such as blocks, transactions, token transfers, and decoded events on the Base network without the need for API keys, account registration, or manual intervention. Each SQL query costs a fixed fee of $0.1 and is settled instantly on-chain via USDC. The x402 protocol simplifies the payment process: after receiving a 402 error response, the agent obtains the payment request, signs the USDC payment proof, and can directly receive the query results.