Coinbase-Backed x402 Protocol Lets AI Agents Pay for APIs Using Stablecoins

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The x402 protocol is an open, HTTP-native payment standard developed by Coinbase and now governed by the x402 Foundation, designed to enable software to pay for APIs automatically using stablecoins like USDC. It revives the long-dormant HTTP 402 Payment Required status code, embedding payments directly into standard HTTP request-response cycles rather than relying on separate billing flows. The protocol is particularly aimed at autonomous AI agents, which cannot manage traditional account signups, API keys, or subscription renewals on their own. In the x402 flow, a client requests a resource, receives payment terms from the server, submits a signed payment proof, and gains access once a facilitator verifies the transaction. The standard is open and not locked to any Coinbase product, making it applicable to a broad range of machine-to-machine and decentralized finance use cases.

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Nvidia Launches NeMo Switchyard to Cut AI Agent Costs via Intelligent Model Routing

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How a 155 KiB row silently broke writes in CockroachDB despite healthy infrastructure

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