Unverified50% confidenceFactExact time
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.
1
Sources
50%
Confidence
Long-term
Relevance
10/15/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedThe name x402 is derived from HTTP status code 402 (Payment Required), which was defined in the HTTP/1.1 specification but has long been reserved and unused.80% similarUnverifiedHTTP 402（Payment Required）是HTTP/1.1规范中最早定义的状态码之一，长期处于保留状态70% similarUnverified断点续传依赖于 HTTP/1.1 协议中的 Range 请求头机制（RFC 7233），服务器返回 206 Partial Content 状态码64% similarUnverifiedHTTP 429是HTTP协议中专门用于表示速率限制的状态码，服务器通常附带Retry-After响应头64% similarUnverifiedHTTP 403 (Forbidden) is the standard permission-denial status code, returned by the server when the requester lacks access rights to a resource.64% similar
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