docs: add x402 payments section at /x402#13
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Checked that lll links are intact.
Add a standalone x402 documentation product (its own Docusaurus instance served at /x402, with its own navbar tab), modeled on the CDP x402 docs: - intro (overview/landing), how-it-works (roles, 402 flow + body, schemes), networks-and-token, quickstart (sellers/buyers), facilitator, sdk - new `x402` content-docs plugin instance + sidebarsX402.ts + navbar entry, x402 added to local search indexing The facilitator page documents the hosted HPP facilitators (facilitator.hpp.io / facilitator-sepolia.hpp.io) and is intended as the link target for the x402-foundation facilitator registry.
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Summary
Adds a standalone x402 documentation product served at
/x402, modeled on the CDP x402 docs. It is a dedicated Docusaurus instance with its own navbar tab — the same pattern as/huband/hpp-router— so it is independent of the main HPP builder docs.Pages (
x402/)/x402, landing) — what x402 is, what HPP providesexact/uptoschemes, replay/idempotency@x402/expressresource server, USDC.e registration, priced routeswrapFetchWithPaymentclient/agent, failure handling/supported/verify/settle, gaslessupto, self-hostingConfig
x402content-docs plugin instance (routeBasePath: 'x402'),sidebarsX402.ts, navbar x402 entry, and x402 added to local search indexing.Notes
@x402SDK and working HPP server/client code; facts (networks, USDC.e0x401eCb…, facilitator endpoints,exact+uptoschemes, sponsor addresses, CORS) were verified against the live/supportedendpoints.npm run buildpasses withonBrokenLinks: 'throw'./x402/facilitator) is intended as the link target for the x402-foundation facilitator registry.