Coinbase's Developer Platform (CDP) has launched a SQL API that supports x402 payments, enabling AI agents to autonomously access on-chain data from Base, including blocks, transactions, token transfers, and decoded events. The API eliminates the need for API keys or account registration, with each query costing $0.10 in USDC. The x402 protocol allows agents to receive a 402 error, sign a payment proof, and retrieve results instantly. This update brings new on-chain capabilities for developers and data consumers.

BlockBeats report: On February 13, Coinbase Developer Platform (CDP) announced the launch of an SQL API supporting x402 payments, enabling AI agents to access indexed data on Base—such as blocks, transactions, token transfers, and decoded events—without requiring API keys, account registration, or human intervention, and pay on demand.

Each SQL query costs a fixed fee of $0.10, settled on-chain instantly via USDC. The x402 protocol streamlines payment: agents receive a 402 error response indicating the payment requirement, sign a USDC payment proof, and immediately obtain the query result.

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