Pre-burst chain liveness check: probes a pool of public RPCs in parallel; median block number, max lag between RPCs, head age, latency, 0-100 health score. Call 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.

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

Pre-broadcast gas check: base fee + p50/p90 priority fee in gwei from eth_feeHistory, plus USD cost per common tx type (native transfer, ERC-20 transfer, swap) at live ETH/USD. Size gas budgets or postpone txs under congestion. Never returns null costs — degraded upstreams are a free 502, not a paid empty answer. Chains: ethereum, base, arbitrum, optimism.

Pre-trade exit-liquidity check for an ERC-20: top-10 holder concentration %, ex-LP/ex-known-router concentration, per-holder balance %, contract-or-EOA flag. High concentration = thin exit liquidity. 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.

Pre-execution oracle staleness check: direct eth_call to a Chainlink aggregator's latestRoundData(). feed = 0x-address OR alias (eth-usd, btc-usd, usdc-usd). Returns scaled answer, updated_at, staleness vs the feed's real heartbeat, and is_safe_to_use. Call before borrows or oracle-dependent execution. Chains: ethereum, base, arbitrum, optimism.

Pre-trade funding check for perp positions: one call aggregates live funding across Hyperliquid + dYdX + Aevo for a ticker (BTC, ETH, SOL, …). Per-venue 8h funding, annualized APR, open interest USD, mark price, and cross-venue median APR. Spot delta-neutral carry or skewed funding before opening a position. Cached 30s.

Pre-quote price sanity check: median across CoinGecko + DexScreener + GeckoTerminal with per-source quotes and spread in bps (broken >20%-off sources excluded from spread, kept visible). token = ticker (eth/btc/usdc/usdt/dai/aero…) or any ERC-20 address. Detects stale or divergent feeds before an agent quotes or trades. 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.