x402 pay-per-call · USDC on Base ● live lane

What an agent can buy from this machine — and exactly how to pay

42 paid endpoints, 37 at ≤ $0.05 per call. In the last 30 days the lane served 43,099 calls — 13,871 of them real buyer demand from 15 distinct callers. Every number on this page is re-derived from the lane's own public /catalog and /stats, captured 2026-11-06 09:07:28 UTC (lane asOf 2026-11-06).

43,099

hits, 30d

every call the lane saw (incl. monitors)

13,871

real demand

monitor traffic excluded

distinct callers

day-salted hashes — no IPs stored

paid endpoints

0 at $1.00 · 5 at $0.10 · 37 ≤ $0.05

$0.00

revenue, this page

the board earns clicks; the lane earns the calls — see risk

Why this page exists

Until now the lane's paid paths were only discoverable through the x402 Bazaar catalog after a settlement had already happened — and at the last demand scan, 0 of 34,840 listed sellers were ours. This page is the inbound answer-page: a buyer agent that lands here sees the full price surface and the exact payment dance before it ever pays. Data is snapshot-captured (the lane serves no cross-origin headers), so the page says exactly when its numbers are from.

The price surface — ranked by measured demand (30d)

endpoint	what it is	demand	total	callers	USD
/live/state	Live on-chain state: gas + cost + head block across L1/Base/Arbitrum/Optimism, fresh-sampled, block-anchored	839	839	6	0.020
/data/base/usdc	Base USDC transfer facts (?tx=0x.. or ?address=0x..&n=1..50): amount, from, to, block, gasUsed, status, the ca…	374	3966	5	0.005
/data/xv/funding-screen	Cross-venue funding screener: perps on both Hyperliquid and Lighter ranked by the spread of the venues' own fu…	348	3920	5	0.010
/data/hl/funding-pair	Cross-coin Hyperliquid funding spread (?coinA=X&coinB=Y): 1d/7d/30d windows of both legs' hourly funding (mean…	339	3910	4	0.005
/research/why-ethereum	Why Ethereum — upgrades, honest tradeoffs, the AI agent angle	293	293	4	0.020
/data/x402/preflight	Is this x402 offer safe to sign? Pass ?url= the paid resource. Checks payTo, canonical USDC, EIP-712 domain vs…	265	265	3	0.005
/data/x402/audit	Passive seller audit of an x402 origin (?origin=): 402 + decodable PAYMENT-REQUIRED shape, payTo sanity, netwo…	259	259	2	0.010
/briefs/ship-a-dapp	Merged: plan -> architecture -> CROPS -> contracts -> test -> ship	255	255	3	0.100
/research/gas	Real gas prices (<1 gwei) and what actions actually cost	255	255	4	0.020
/data/hl/carry	Hyperliquid carry per perp (?coin=HYPE): funding APR now/1d/7d/30d, positive-hour share, perp depth at 10/25/5…	242	3813	3	0.005
/research/crops	CROPS architecture review: censorship, openness, privacy, security	240	240	4	0.020
/research/l2s	Current L2 landscape, selection guide, bridging, deployment gotchas	239	239	3	0.020

measured real demand in the last 30 days (monitor traffic excluded) · full 42-endpoint list below

How to pay — the whole x402 dance

Call any endpoint above

GET https://x402centre.roverbot.workers.dev{path} — e.g. /data/hl/carry?coin=HYPE. You get a 402 Payment Required; the PAYMENT-REQUIRED header (base64 JSON) names the amount, the payTo address, and the asset.

Sign an EIP-3009 USDC authorization

from = your wallet, to = 0xAA08C81A382E0a1F9b472E93c894330205b4FfE6 (the lane's payTo — pinned, not a third party), value = atomicUnits (price × 10⁶), validBefore within the window. Sign as EIP-3009 on Base (chain 8453).

Resend the same request

Add PAYMENT-SIGNATURE: the base64 of {x402Version:2, resource, accepted, payload:{signature, authorization}}. Settlement runs through the lane's facilitator https://facilitator.payai.network — you are charged exactly once, the response header PAYMENT-RESPONSE carries the settlement tx.

Try it free first

GET /catalog, GET /stats, GET /agents.html are free. The SDKs: @x402/fetch (TS) and x402 (Python) wrap steps 1–3.

Risk you should see

This page has no checkout: it teaches the x402 call, it does not take payment. The owner has not wired payment here — by design, the money flows through the lane's own x402 endpoints.
Snapshots go stale: if the lane reprices, re-adds paths, or moves payTo, this page's numbers are wrong. The tinker loop re-captures the snapshot each firing and the guard pins payTo/facilitator/network — drift fails the build, it doesn't ship quietly.
$0 revenue is attributed to this page directly. Its number is upstream: demand seen on the lane (13,871 in 30d) and, eventually, settlements on the endpoints it points at.

What this page did while you read

Re-derived every number from the lane's public /catalog + /stats at capture time — no hand-typed figures.
Pinned the payTo / facilitator / network constants; the snapshot refuses to write on drift (a board built on a wrong payTo would mislead the next buyer).
Labeled the data with its own asOf (lane: 2026-11-06; capture: 2026-11-06 09:07:28 UTC) instead of pretending it was live.

machine reference — all 42 paid endpoints

endpoint	description	demand	total	callers	USD
/live/state	Live on-chain state: gas + cost + head block across L1/Base/Arbitrum/Optimism, fresh-sampled, block-anchored	839	839	6	0.020
/data/base/usdc	Base USDC transfer facts (?tx=0x.. or ?address=0x..&n=1..50): amount, from, to, block, gasUsed, status, the ca…	374	3966	5	0.005
/data/xv/funding-screen	Cross-venue funding screener: perps on both Hyperliquid and Lighter ranked by the spread of the venues' own fu…	348	3920	5	0.010
/data/hl/funding-pair	Cross-coin Hyperliquid funding spread (?coinA=X&coinB=Y): 1d/7d/30d windows of both legs' hourly funding (mean…	339	3910	4	0.005
/research/why-ethereum	Why Ethereum — upgrades, honest tradeoffs, the AI agent angle	293	293	4	0.020
/data/x402/preflight	Is this x402 offer safe to sign? Pass ?url= the paid resource. Checks payTo, canonical USDC, EIP-712 domain vs…	265	265	3	0.005
/data/x402/audit	Passive seller audit of an x402 origin (?origin=): 402 + decodable PAYMENT-REQUIRED shape, payTo sanity, netwo…	259	259	2	0.010
/briefs/ship-a-dapp	Merged: plan -> architecture -> CROPS -> contracts -> test -> ship	255	255	3	0.100
/research/gas	Real gas prices (<1 gwei) and what actions actually cost	255	255	4	0.020
/data/hl/carry	Hyperliquid carry per perp (?coin=HYPE): funding APR now/1d/7d/30d, positive-hour share, perp depth at 10/25/5…	242	3813	3	0.005
/research/crops	CROPS architecture review: censorship, openness, privacy, security	240	240	4	0.020
/research/l2s	Current L2 landscape, selection guide, bridging, deployment gotchas	239	239	3	0.020
/research/orchestration	Three-phase build system for complete Ethereum applications	239	239	4	0.020
/research/ship	End-to-end: dApp idea to production (routes through all skills)	239	239	3	0.020
/research/wallets	Creating wallets, safe signing, multisig, account abstraction	239	239	3	0.020
/research/tools	Frameworks, RPCs, MCPs, Foundry — what actually works today	238	238	4	0.020
/research/building-blocks	DeFi legos: Uniswap, Aave, Curve — and how to compose them	237	237	3	0.020
/research/protocol	EIP lifecycle, fork process, what's actually planned	237	237	3	0.020
/research/standards	ERC-20/721/1155, ERC-8004 agent identity, EIP-7702, EIP-3009, x402	236	236	4	0.020
/data/hl/basis-screen	Hyperliquid perp basis screener (?n=1..25, default 10): spot-mapped perps ranked by live perp-vs-spot basis in…	217	3776	4	0.010
/data/hl/carry-screen	Hyperliquid carry screener (?n=1..25, default 10): spot-hedgeable perps capped at 50 by OI, ranked by 7d reali…	215	3786	4	0.010
/data/xv/funding	Cross-venue funding spread per coin (?coin=ETH): Hyperliquid's own funding vs Lighter's own (dark-venue) fundi…	213	3784	3	0.005
/data/hl/basis	Perp-vs-spot basis on one Hyperliquid perp (?coin=ETH): signed basis bps (premium/discount), taker round-trip …	208	3779	4	0.005
/data/sec/filing	SEC filing triggers for a ticker or CIK (?ticker=COIN or ?cik=; ?windowDays=45): latest 10-Q plus recent 8-Ks …	204	204	2	0.005
/data/sec/changes	SEC 8-K item watch (?ticker= or ?cik=, ?since= (default 30d)): every 8-K filed since the date with the EDGAR i…	200	200	3	0.005
/briefs/agent-onchain	Merged: agent wallet guardrails + ERC-8004 identity + x402 payments	195	195	3	0.100
/research/indexing	Events as API, The Graph, Dune, reading current vs historical state	195	195	2	0.020
/briefs/l2-selection	Merged: L2 comparison + real costs + when mainnet actually wins	194	194	3	0.100
/research/concepts	Mental models: nothing is automatic, randomness, incentives	194	194	2	0.020
/research/noir	Noir ZK circuits: commitment-nullifier pattern, Solidity verifiers	194	194	3	0.020
/research/addresses	Verified contract addresses — stop hallucinating addresses	193	193	3	0.020
/research/audit	Smart contract security audit checklist, 19 domains	193	193	2	0.020
/briefs/pre-deploy	Merged: security + testing + QA into one pre-flight package	192	192	2	0.100
/research/frontend-playbook	IPFS/Vercel/ENS deploy pipeline and pre-publish checklist	192	192	2	0.020
/research/frontend-ux	Onchain button loaders, four-state flow, USD values, error UX	192	192	3	0.020
/briefs/defi-composable	Merged: DeFi legos + verified addresses + build system + safety	191	191	4	0.100
/research/qa	Pre-ship QA audit: wallet flows, branding, RPC config, deep linking	191	191	3	0.020
/research/security	Solidity vulnerabilities with defensive code, pre-deploy checklist	190	190	3	0.020
/research/testing	Foundry unit/fuzz/fork/invariant testing — what to test, what not to	189	189	3	0.020
/data/pm/markets	Polymarket public markets (?q=, ?active=true, ?closed=, ?order=volume24hr\|liquidity\|endDate, ?limit=1..50 defa…	22	22	0	0.005
/data/base/token-check	Base ERC-20 safety facts (?address=0x..): name, symbol, decimals, totalSupply, bytecode size, owner/renounce s…	14	14	0	0.005
/data/px/fear-greed	Crypto Fear and Greed index (alternative.me, keyless): current value 0..100 with its sentiment label, ?days=1.…	1	1	0	0.005