AI Agents Can Now Autonomously Pay for APIs Using USDC on Base

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A new endpoint built on the x402 protocol and Base blockchain allows AI agents to independently pay for API calls using USDC. The system works by having the agent deposit USDC once into a prepaid balance, then settling each subsequent API call via an off-chain signed voucher. This approach eliminates the need for on-chain transactions and gas fees, making payments instant. The project, available at x402.obolpay.xyz, also supports the Model Context Protocol (MCP), enabling easier integration into existing AI agent workflows. Developers can access a client script and a manifest file to plug the payment system into their agents within minutes.

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