Foresight News 消息，Coinbase 开发者平台宣布推出全新开源支付协议 x402，旨在激活互联网长期保留未启用的 HTTP 402 状态码“Payment Required”，将其转化为真正的链上支付层，适用于 API 服务商、内容创作者、上下文协议等新型场景。x402 允许服务器请求支付，客户端（包括人类与智能代理）即时响应，支持微支付按次付费，无需繁琐订阅。
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