board-paypath · the x402 dance, copied from the live lane ● captured 2026-10-26

Every row on the board comes with its own pay path

41 paid endpoints, each with its exact payment requirement — amount, payTo, network, endpoint — copied verbatim from the live /catalog and the real 402 challenge at snapshot time (capture 2026-10-26, lane asOf 2026-10-26). This page teaches the x402 call. It never takes the money.

paid endpoints

every row below carries its own dance

5,724

real demand, 30d

monitor traffic excluded · 53,474 total hits

distinct callers

day-salted hashes — no IPs stored

steps to pay

challenge -> sign -> retry

$0.00

taken by this page

it shortens the path to settlement — it is not a checkout

Why this page exists

The board gets the eyeballs; this converts them into settlements with zero checkout code. A buyer agent that lands here reads a row and can fire the exact x402 call the lane demands right now — no protocol docs, no guessing the payTo. The one thing the page cannot copy is the signature, and that needs the buyer's key, so it stays with the buyer.

The dance — x402 v2, exact scheme, EIP-3009 USDC on Base

Call the endpoint with no header

GET https://x402centre.roverbot.workers.dev/live/state (or any row below) → 402 Payment Required. The body's accepts[0] is that row's exact requirement: scheme exact, network eip155:8453, amount 20000 atomic USDC, asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, payTo 0xAA08C81A382E0a1F9b472E93c894330205b4FfE6, maxTimeoutSeconds 60. The error text itself names the header for step 3: PAYMENT-SIGNATURE header is required.

Sign an EIP-3009 authorization (USDC on Base)

TransferWithAuthorization typed data — domain {name "USD Coin", version "2", chainId 8453, verifyingContract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913}; message {from: your wallet, to: 0xAA08C81A382E0a1F9b472E93c894330205b4FfE6, value: the row's amount, validAfter now−60, validBefore now+120, nonce: 32 random bytes}. Signed with the buyer's key — never by this page.

Base64 the payload into PAYMENT-SIGNATURE

PAYMENT-SIGNATURE: base64(payload) where the payload is the JSON below — for the probed row the values are already filled in; for any other row swap accepted for that row's own accepts[0] and value for that row's amount. Settlement runs through the lane's facilitator https://facilitator.payai.network.

Retry the same GET

200 + the body you paid for. The PAYMENT-RESPONSE header (base64 JSON) carries transaction — the settlement receipt. If no transaction comes back, do not retry blindly: you may already have been charged.

The real 402 challenge — live-observed at capture (probed: /live/state)

{
  "accepts": [
    {
      "amount": "20000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "assetTransferMethod": "eip3009",
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 60,
      "network": "eip155:8453",
      "payTo": "0xAA08C81A382E0a1F9b472E93c894330205b4FfE6",
      "scheme": "exact"
    }
  ],
  "error": "PAYMENT-SIGNATURE header is required",
  "resource": {
    "description": "Live on-chain state: gas + cost + head block across L1/Base/Arbitrum/Optimism, fresh-sampled, block-anchored",
    "mimeType": "text/markdown",
    "serviceName": "ethskills-x402",
    "url": "https://x402centre.roverbot.workers.dev/live/state"
  },
  "x402Version": 2
}

The payload — probed row's values filled in (signature needs the buyer's key)

{
  "accepted": {
    "amount": "20000",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "assetTransferMethod": "eip3009",
      "name": "USD Coin",
      "version": "2"
    },
    "maxTimeoutSeconds": 60,
    "network": "eip155:8453",
    "payTo": "0xAA08C81A382E0a1F9b472E93c894330205b4FfE6",
    "scheme": "exact"
  },
  "payload": {
    "authorization": {
      "from": "<buyer's wallet address>",
      "nonce": "<0x + 32 random bytes>",
      "to": "0xAA08C81A382E0a1F9b472E93c894330205b4FfE6",
      "validAfter": "<unix now - 60>",
      "validBefore": "<unix now + 120>",
      "value": "20000"
    },
    "signature": "<EIP-191 sig of TransferWithAuthorization \u2014 signed with the BUYER's key; this page never holds keys>"
  },
  "x402Version": 2
}

The pay path per row — top 12 by measured demand

/live/state — Live on-chain state: gas + cost + head block across L1/Base/Arbitrum/Optimism, fresh-sampled, block-anchored demand 210 · $0.020 · live

GET  https://x402centre.roverbot.workers.dev/live/state
     -> 402 challenge  amount=20000  payTo=0xAA08C81A382E0a1F9b472E93c894330205b4FfE6  network=eip155:8453
GET  https://x402centre.roverbot.workers.dev/live/state  -H "PAYMENT-SIGNATURE: <base64 payload>"
     -> 200 + body  ·  PAYMENT-RESPONSE header carries the settlement tx

/data/base/usdc — Base USDC transfer facts (?tx=0x.. or ?address=0x..&n=1..50): amount, from, to, block, gasUsed, status, the canonical-US… demand 195 · $0.005 · endpoint

GET  https://x402centre.roverbot.workers.dev/data/base/usdc
     -> 402 challenge  amount=5000  payTo=0xAA08C81A382E0a1F9b472E93c894330205b4FfE6  network=eip155:8453
GET  https://x402centre.roverbot.workers.dev/data/base/usdc  -H "PAYMENT-SIGNATURE: <base64 payload>"
     -> 200 + body  ·  PAYMENT-RESPONSE header carries the settlement tx

/data/xv/funding-screen — Cross-venue funding screener: perps on both Hyperliquid and Lighter ranked by the spread of the venues' own funding (APR… demand 156 · $0.010 · endpoint

GET  https://x402centre.roverbot.workers.dev/data/xv/funding-screen
     -> 402 challenge  amount=10000  payTo=0xAA08C81A382E0a1F9b472E93c894330205b4FfE6  network=eip155:8453
GET  https://x402centre.roverbot.workers.dev/data/xv/funding-screen  -H "PAYMENT-SIGNATURE: <base64 payload>"
     -> 200 + body  ·  PAYMENT-RESPONSE header carries the settlement tx

/data/hl/funding-pair — Cross-coin Hyperliquid funding spread (?coinA=X&coinB=Y): 1d/7d/30d windows of both legs' hourly funding (mean/APR/cv/fl… demand 150 · $0.005 · endpoint

GET  https://x402centre.roverbot.workers.dev/data/hl/funding-pair
     -> 402 challenge  amount=5000  payTo=0xAA08C81A382E0a1F9b472E93c894330205b4FfE6  network=eip155:8453
GET  https://x402centre.roverbot.workers.dev/data/hl/funding-pair  -H "PAYMENT-SIGNATURE: <base64 payload>"
     -> 200 + body  ·  PAYMENT-RESPONSE header carries the settlement tx

/research/why-ethereum — Why Ethereum — upgrades, honest tradeoffs, the AI agent angle demand 106 · $0.020 · topic

GET  https://x402centre.roverbot.workers.dev/research/why-ethereum
     -> 402 challenge  amount=20000  payTo=0xAA08C81A382E0a1F9b472E93c894330205b4FfE6  network=eip155:8453
GET  https://x402centre.roverbot.workers.dev/research/why-ethereum  -H "PAYMENT-SIGNATURE: <base64 payload>"
     -> 200 + body  ·  PAYMENT-RESPONSE header carries the settlement tx

/research/gas — Real gas prices (<1 gwei) and what actions actually cost demand 92 · $0.020 · topic

GET  https://x402centre.roverbot.workers.dev/research/gas
     -> 402 challenge  amount=20000  payTo=0xAA08C81A382E0a1F9b472E93c894330205b4FfE6  network=eip155:8453
GET  https://x402centre.roverbot.workers.dev/research/gas  -H "PAYMENT-SIGNATURE: <base64 payload>"
     -> 200 + body  ·  PAYMENT-RESPONSE header carries the settlement tx

/data/hl/carry — Hyperliquid carry per perp (?coin=HYPE): funding APR now/1d/7d/30d, positive-hour share, perp depth at 10/25/50 bps each… demand 91 · $0.005 · endpoint

GET  https://x402centre.roverbot.workers.dev/data/hl/carry
     -> 402 challenge  amount=5000  payTo=0xAA08C81A382E0a1F9b472E93c894330205b4FfE6  network=eip155:8453
GET  https://x402centre.roverbot.workers.dev/data/hl/carry  -H "PAYMENT-SIGNATURE: <base64 payload>"
     -> 200 + body  ·  PAYMENT-RESPONSE header carries the settlement tx

/briefs/ship-a-dapp — Merged: plan -> architecture -> CROPS -> contracts -> test -> ship demand 89 · $0.100 · brief

GET  https://x402centre.roverbot.workers.dev/briefs/ship-a-dapp
     -> 402 challenge  amount=100000  payTo=0xAA08C81A382E0a1F9b472E93c894330205b4FfE6  network=eip155:8453
GET  https://x402centre.roverbot.workers.dev/briefs/ship-a-dapp  -H "PAYMENT-SIGNATURE: <base64 payload>"
     -> 200 + body  ·  PAYMENT-RESPONSE header carries the settlement tx

/research/crops — CROPS architecture review: censorship, openness, privacy, security demand 87 · $0.020 · topic

GET  https://x402centre.roverbot.workers.dev/research/crops
     -> 402 challenge  amount=20000  payTo=0xAA08C81A382E0a1F9b472E93c894330205b4FfE6  network=eip155:8453
GET  https://x402centre.roverbot.workers.dev/research/crops  -H "PAYMENT-SIGNATURE: <base64 payload>"
     -> 200 + body  ·  PAYMENT-RESPONSE header carries the settlement tx

/research/orchestration — Three-phase build system for complete Ethereum applications demand 87 · $0.020 · topic

GET  https://x402centre.roverbot.workers.dev/research/orchestration
     -> 402 challenge  amount=20000  payTo=0xAA08C81A382E0a1F9b472E93c894330205b4FfE6  network=eip155:8453
GET  https://x402centre.roverbot.workers.dev/research/orchestration  -H "PAYMENT-SIGNATURE: <base64 payload>"
     -> 200 + body  ·  PAYMENT-RESPONSE header carries the settlement tx

/research/ship — End-to-end: dApp idea to production (routes through all skills) demand 87 · $0.020 · topic

GET  https://x402centre.roverbot.workers.dev/research/ship
     -> 402 challenge  amount=20000  payTo=0xAA08C81A382E0a1F9b472E93c894330205b4FfE6  network=eip155:8453
GET  https://x402centre.roverbot.workers.dev/research/ship  -H "PAYMENT-SIGNATURE: <base64 payload>"
     -> 200 + body  ·  PAYMENT-RESPONSE header carries the settlement tx

/research/standards — ERC-20/721/1155, ERC-8004 agent identity, EIP-7702, EIP-3009, x402 demand 87 · $0.020 · topic

GET  https://x402centre.roverbot.workers.dev/research/standards
     -> 402 challenge  amount=20000  payTo=0xAA08C81A382E0a1F9b472E93c894330205b4FfE6  network=eip155:8453
GET  https://x402centre.roverbot.workers.dev/research/standards  -H "PAYMENT-SIGNATURE: <base64 payload>"
     -> 200 + body  ·  PAYMENT-RESPONSE header carries the settlement tx

probed row (the one whose live 402 challenge is shown above) · full 41-endpoint table below

Risk you should see

No checkout, no keys. This page teaches the x402 call; it holds no private key and takes no payment. Money flows only through the lane's own x402 endpoints, on-chain (USDC on Base).
Snapshots go stale. If the lane reprices, moves payTo, or changes the challenge, this page is wrong — and the snapshot refuses to write on drift (pinned payTo/facilitator/network, challenge must agree with the catalog), the guard pins every figure, and byte-identity rejects any post-render edit.
$0 revenue is attributed to this page directly. Its number is upstream: demand seen on the lane (5,724 real calls in 30d) and, eventually, settlements on the endpoints it points at.

What this page did while you read

Captured the real 402 challenge at snapshot time (not a protocol-docs guess): GET /live/state with no payment → 20000 atomic, payTo pinned, and the challenge agrees with the catalog (the gate enforces it).
Copied every row's amount / payTo / network / endpoint from the live catalog — no hand-typed figures.
Labeled the data: capture 2026-10-26, lane asOf 2026-10-26 — instead of pretending it was live.

machine reference — all 41 paid endpoints

endpoint	description	demand	total	callers	USD	amount (atomic USDC)
/live/state	Live on-chain state: gas + cost + head block across L1/Base/Arbitrum/Optimism, fresh-sampled, block-	210	210	4	0.020	20000
/data/base/usdc	Base USDC transfer facts (?tx=0x.. or ?address=0x..&n=1..50): amount, from, to, block, gasUsed, stat	195	2731	2	0.005	5000
/data/xv/funding-screen	Cross-venue funding screener: perps on both Hyperliquid and Lighter ranked by the spread of the venu	156	2692	3	0.010	10000
/data/hl/funding-pair	Cross-coin Hyperliquid funding spread (?coinA=X&coinB=Y): 1d/7d/30d windows of both legs' hourly fun	150	2686	4	0.005	5000
/research/why-ethereum	Why Ethereum — upgrades, honest tradeoffs, the AI agent angle	106	106	2	0.020	20000
/research/gas	Real gas prices (<1 gwei) and what actions actually cost	92	92	2	0.020	20000
/data/hl/carry	Hyperliquid carry per perp (?coin=HYPE): funding APR now/1d/7d/30d, positive-hour share, perp depth	91	2627	3	0.005	5000
/briefs/ship-a-dapp	Merged: plan -> architecture -> CROPS -> contracts -> test -> ship	89	89	2	0.100	100000
/research/crops	CROPS architecture review: censorship, openness, privacy, security	87	87	2	0.020	20000
/research/orchestration	Three-phase build system for complete Ethereum applications	87	87	2	0.020	20000
/research/ship	End-to-end: dApp idea to production (routes through all skills)	87	87	2	0.020	20000
/research/standards	ERC-20/721/1155, ERC-8004 agent identity, EIP-7702, EIP-3009, x402	87	87	2	0.020	20000
/research/tools	Frameworks, RPCs, MCPs, Foundry — what actually works today	87	87	3	0.020	20000
/research/wallets	Creating wallets, safe signing, multisig, account abstraction	87	87	3	0.020	20000
/research/building-blocks	DeFi legos: Uniswap, Aave, Curve — and how to compose them	85	85	2	0.020	20000
/research/l2s	Current L2 landscape, selection guide, bridging, deployment gotchas	85	85	1	0.020	20000
/research/protocol	EIP lifecycle, fork process, what's actually planned	84	84	3	0.020	20000
/data/x402/audit	Passive seller audit of an x402 origin (?origin=): 402 + decodable PAYMENT-REQUIRED shape, payTo san	79	79	2	0.020	20000
/data/x402/preflight	Is this x402 offer safe to sign? Pass ?url= the paid resource. Checks payTo, canonical USDC, EIP-712	77	77	1	0.010	10000
/data/hl/basis-screen	Hyperliquid perp basis screener (?n=1..25, default 10): spot-mapped perps ranked by live perp-vs-spo	68	2592	3	0.010	10000
/data/hl/carry-screen	Hyperliquid carry screener (?n=1..25, default 10): spot-hedgeable perps capped at 50 by OI, ranked b	68	2604	2	0.010	10000
/data/sec/filing	SEC filing triggers for a ticker or CIK (?ticker=COIN or ?cik=; ?windowDays=45): latest 10-Q plus re	67	67	1	0.010	10000
/data/sec/changes	SEC 8-K item watch (?ticker= or ?cik=, ?since= (default 30d)): every 8-K filed since the date with t	66	66	0	0.010	10000
/data/hl/basis	Perp-vs-spot basis on one Hyperliquid perp (?coin=ETH): signed basis bps (premium/discount), taker r	62	2598	2	0.005	5000
/data/xv/funding	Cross-venue funding spread per coin (?coin=ETH): Hyperliquid's own funding vs Lighter's own (dark-ve	62	2598	3	0.005	5000
/briefs/agent-onchain	Merged: agent wallet guardrails + ERC-8004 identity + x402 payments	60	60	1	0.100	100000
/briefs/l2-selection	Merged: L2 comparison + real costs + when mainnet actually wins	60	60	1	0.100	100000
/research/addresses	Verified contract addresses — stop hallucinating addresses	60	60	2	0.020	20000
/briefs/pre-deploy	Merged: security + testing + QA into one pre-flight package	59	59	1	0.100	100000
/research/indexing	Events as API, The Graph, Dune, reading current vs historical state	59	59	0	0.020	20000
/briefs/defi-composable	Merged: DeFi legos + verified addresses + build system + safety	58	58	1	0.100	100000
/research/audit	Smart contract security audit checklist, 19 domains	58	58	0	0.020	20000
/research/concepts	Mental models: nothing is automatic, randomness, incentives	58	58	0	0.020	20000
/research/frontend-playbook	IPFS/Vercel/ENS deploy pipeline and pre-publish checklist	58	58	1	0.020	20000
/research/frontend-ux	Onchain button loaders, four-state flow, USD values, error UX	58	58	0	0.020	20000
/research/noir	Noir ZK circuits: commitment-nullifier pattern, Solidity verifiers	58	58	1	0.020	20000
/research/qa	Pre-ship QA audit: wallet flows, branding, RPC config, deep linking	58	58	2	0.020	20000
/research/security	Solidity vulnerabilities with defensive code, pre-deploy checklist	58	58	2	0.020	20000
/research/testing	Foundry unit/fuzz/fork/invariant testing — what to test, what not to	57	57	2	0.020	20000
/data/base/token-check	Base ERC-20 safety facts (?address=0x..): name, symbol, decimals, totalSupply, bytecode size, owner/	13	13	0	0.010	10000
/data/pm/markets	Polymarket public markets (?q=, ?active=true, ?closed=, ?order=volume24hr\|liquidity\|endDate, ?limit=	8	8	0	0.010	10000