Chain liveness probe: queries 3 public RPCs in parallel, returns median block number, max lag between RPCs, head age, latency, and a 0-100 health score. Use before timing a tx burst or switching RPC. Chains: ethereum, base, arbitrum, optimism.

ENS resolve in either direction: ENS name -> 0x address (forward) OR 0x address -> primary ENS name (reverse). Use bare label (treated as label.eth) or full name like vitalik.eth or any 0x EVM address. Backed by the public ENS subgraph + mainnet RPC. Free upstream.

Returns a structured explanation of any EVM smart contract on Ethereum, Base, Arbitrum, or Optimism. Output: type label (ERC20/ERC721/proxy/router), name, 3-bullet summary, risk warnings (unverified, upgradeable_via_proxy, mintable_by_owner, pausable), and top 5 selectors called in 24h with live call counts. Rugcheck, ABI decoding, proxy detection, "what is 0x..." lookups before an agent signs a tx. Works on unverified contracts via 4byte fallback.

Farcaster user lookup: pass username (no @), FID integer, or 0x address. Returns FID, username, display name, bio, pfp URL, follower / following counts, custody address, and verified 0x addresses. Identity primitive for social-aware agents.

Live gas snapshot: base fee + p50/p90 priority fee in gwei from eth_feeHistory, plus USD cost per common tx type (native transfer, ERC-20 transfer, swap). ETH/USD from CoinGecko folded in. Use to size gas budgets or skip txs when network is congested. Chains: ethereum, base, arbitrum, optimism.

Top-N holder report for an ERC-20: top-10 concentration %, ex-LP/ex-known-router concentration, per-holder balance %, contract-or-EOA flag, well-known label if any. Pre-trade rug check for sniper / trading agents — high concentration means exit liquidity is thin. Chains: ethereum, base, arbitrum, optimism.

NFT collection stats via OpenSea API v2 (no key needed). Pass the OpenSea slug (e.g. 'azuki', 'pudgypenguins'). Returns floor price ETH, owners count, total supply, all-time + 24h/7d/30d volume and sales. Use for NFT pricing checks before mint/buy.

Chainlink oracle freshness probe via direct eth_call to latestRoundData(): description, decimals, scaled answer, updated_at timestamp, staleness in seconds, and is_safe_to_use boolean. Lending / AMM-design agents call before triggering a borrow or oracle-dependent execution. Chains: ethereum, base, arbitrum, optimism.

Perpetual funding rates across Hyperliquid + dYdX + Aevo for a ticker (BTC, ETH, SOL, …). Returns per-venue 8h funding, annualized APR, open interest USD, mark price, and median APR across venues. Use to spot delta-neutral carry opportunities or skewed funding pre-trade.

Cross-source token price: median of CoinGecko + DexScreener + GeckoTerminal with per-source quotes and spread in bps. Pass a common ticker (eth/usdc/aero) or any ERC-20 contract address. Reveals dead sources and lets agents detect arbitrage windows or stale feeds before quoting. Chains: ethereum, base, arbitrum, optimism.

Cross-chain wallet age and sybil signals. Returns first-seen timestamp across Ethereum/Base/Arbitrum/Optimism (in parallel), age in days, total tx sample, distinct counterparties, list of active chains, freshness score 0-100 (higher = looks more like a real human), and notes (fresh_wallet, multi_chain_user, very_low_activity). Useful for agents verifying counterparties or assessing identity claims before paying.

Top-N DeFi yield pools across all chains, sorted by APY. Filters: ?chain=base, ?asset=USDC, ?min_tvl=1000000, ?max_results=5, ?stable_only=true. Each pool has live APY, 30d-mean, stability score (1 - sigma/mu), TVL, IL risk flag, single/multi exposure, and a caveat string (impermanent loss, reward-token sell pressure, very high APY, etc.). For agents managing idle stablecoin treasury.