Concept402状态码 / HTTP 402
HTTP 402 Payment Required
A reserved payment-required status code in the HTTP protocol, defined in 1997 by Tim Berners-Lee in RFC 2068. The x402 protocol reactivates it for machine-native payments.
Timeline (last 90 days)
Oct 15
The x402 protocol reuses HTTP's 402 Payment Required status code, letting the server declare in its response the amount, asset, and settlement chain required to pay for the call, on which basis the client completes signing and retries.
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