Live on-chain state: gas + cost + head block across L1/Base/Arbitrum/Optimism, fresh-sa…
Live on-chain state: gas + cost + head block across L1/Base/Arbitrum/Optimism, fresh-sampled, block-anchored
47 resources listed under x402centre.roverbot.workers.dev.
Source: https://x402centre.roverbot.workers.dev/.well-known/x402.json · last updated 2026-11-11
Live on-chain state: gas + cost + head block across L1/Base/Arbitrum/Optimism, fresh-sampled, block-anchored
Why Ethereum — upgrades, honest tradeoffs, the AI agent angle
End-to-end: dApp idea to production (routes through all skills)
CROPS architecture review: censorship, openness, privacy, security
EIP lifecycle, fork process, what's actually planned
Real gas prices (<1 gwei) and what actions actually cost
Creating wallets, safe signing, multisig, account abstraction
Current L2 landscape, selection guide, bridging, deployment gotchas
ERC-20/721/1155, ERC-8004 agent identity, EIP-7702, EIP-3009, x402
Frameworks, RPCs, MCPs, Foundry — what actually works today
DeFi legos: Uniswap, Aave, Curve — and how to compose them
Three-phase build system for complete Ethereum applications
Verified contract addresses — stop hallucinating addresses
Mental models: nothing is automatic, randomness, incentives
Solidity vulnerabilities with defensive code, pre-deploy checklist
Noir ZK circuits: commitment-nullifier pattern, Solidity verifiers
Foundry unit/fuzz/fork/invariant testing — what to test, what not to
Events as API, The Graph, Dune, reading current vs historical state
Onchain button loaders, four-state flow, USD values, error UX
IPFS/Vercel/ENS deploy pipeline and pre-publish checklist
Pre-ship QA audit: wallet flows, branding, RPC config, deep linking
Smart contract security audit checklist, 19 domains
Where AI agents get paid work on Base: bounty venues, per-call x402, and on-chain payment evidence
I paid with x402: how a buyer verifies the settlement landed — 402 → EIP-3009 → PAYMENT-RESPONSE, what settled means on Base, and a hand-checkable worked example
Merged: plan -> architecture -> CROPS -> contracts -> test -> ship
Merged: security + testing + QA into one pre-flight package
Merged: L2 comparison + real costs + when mainnet actually wins
Merged: agent wallet guardrails + ERC-8004 identity + x402 payments
Merged: DeFi legos + verified addresses + build system + safety
Polymarket public markets (?q=, ?active=true, ?closed=, ?order=volume24hr|liquidity|endDate, ?limit=1..50 default 20): rows with question, slug, event URL, per-outcome n…
Hyperliquid carry per perp (?coin=HYPE): funding APR now/1d/7d/30d, positive-hour share, perp depth at 10/25/50 bps each side, USDC spot hedge and its depth, taker round…
Is this x402 offer safe to sign? Pass ?url= the paid resource. Checks payTo, canonical USDC, EIP-712 domain vs chain, resource host, amount, window and /.well-known/x402…
Passive seller audit of an x402 origin (?origin=): 402 + decodable PAYMENT-REQUIRED shape, payTo sanity, network and USDC canonicality, resource.url host match, well-kno…
SEC filing triggers for a ticker or CIK (?ticker=COIN or ?cik=; ?windowDays=45): latest 10-Q plus recent 8-Ks with the EDGAR item codes (1.01-9.01) found per document, f…
Base USDC transfer facts (?tx=0x.. or ?address=0x..&n=1..50): amount, from, to, block, gasUsed, status, the canonical-USDC Transfer rows, and whether an EIP-3009 transfe…
Cross-venue funding spread per coin (?coin=ETH): Hyperliquid's own funding vs Lighter's own (dark-venue) funding, APR at each hourly cadence, the spread in bps/yr with d…
Hyperliquid carry screener (?n=1..25, default 10): spot-hedgeable perps capped at 50 by OI, ranked by 7d realized funding APR; per row: hedge pair, OI USD, current rate…
Perp-vs-spot basis on one Hyperliquid perp (?coin=ETH): signed basis bps (premium/discount), taker round-trip cost and cover flag, OI USD, USDC spot hedge, depth within…
Hyperliquid perp basis screener (?n=1..25, default 10): spot-mapped perps ranked by live perp-vs-spot basis in bps; divergence gate (legs at the same price level), OI US…
Cross-venue funding screener: perps on both Hyperliquid and Lighter ranked by the spread of the venues' own funding (APR + bps/yr, delta-neutral direction), top n (defau…
Cross-coin Hyperliquid funding spread (?coinA=X&coinB=Y): 1d/7d/30d windows of both legs' hourly funding (mean/APR/cv/flips) and the GROSS spread A-B on jointly-printed…
SEC 8-K item watch (?ticker= or ?cik=, ?since= (default 30d)): every 8-K filed since the date with the EDGAR item codes found per document, filing and report dates, acce…
Base ERC-20 safety facts (?address=0x..): name, symbol, decimals, totalSupply, bytecode size, owner/renounce state, EIP-1967 upgradeability, plus DexScreener price, deep…
Crypto Fear and Greed index (alternative.me, keyless): current value 0..100 with its sentiment label, ?days=1..30 default 7 of daily history, avg, low, high and trend (r…
Verify an x402 settlement on Base (?tx=0x..&payTo=0x.., ?amountUsd= optional): receipt status, block, from, plus whether a canonical-USDC Transfer to the expected payTo…
Coins agents are searching right now: CoinGecko trending (?n=1..25 default 10) with rank (current list position), USD price and 24h change, keyless. Market data only, no…
A coin's market profile in one call: ?symbol=BTC|ETH|SOL (default BTC) -> rank, market cap, USD price, 24h/7d change, ATH and distance from ATH (fromAthPct), keyless Coi…
All resources from this provider: /discovery/merchant (by payment address) or filter /discovery/resources.