ERC-20 allowance lookup: how much a spender can move from an owner's balance, flagging unlimited approvals.

Latest block on an EVM chain: number, hash, time, age in seconds, transaction count, gas used % and base fee.

Recent activity of a Solana address: latest transaction signatures with slot, time, success or failure and memo (up to 25).

Check any x402 endpoint before paying, without paying: price in USD per network, asset (flags anything that is not official USDC), pay-to address and whether it is a contract, authorization timeout, Bazaar metadata, and risk alerts with a clear verdict.

ENS profile: resolved address plus public text records (avatar, description, url, twitter, github, telegram, discord, email).

Address inspector for EVM chains: wallet (EOA), EIP-7702 delegated wallet or contract; bytecode size, ERC-20/721/1155 support, proxy implementation and beacon, nonce and native balance.

Latest block on an EVM chain: number, hash, time, age in seconds, transaction count, gas used % and base fee.

Solana wallet balances: SOL plus every SPL and Token-2022 token held (mint, amount, decimals), with USD value for USDC/USDT.

Tamper-resistant price from Chainlink Data Feeds on Base (ETH/USD, BTC/USD, USDC/USD, or any Chainlink aggregator address), with update time and staleness in seconds.

Official tokenized versions of a US stock or ETF on Solana (xStocks by Backed and Ondo Global Markets): verified mint addresses, on-chain supply and issuer authority check. Accepts NVDA, NVDAx or NVDAon.

Sui wallet balances: SUI and every other token with amount, decimals and USD value where priced, plus the wallet total.

USD price of one or more Solana tokens by mint address (up to 20 at once): price, 24h change and on-chain liquidity, derived from real liquidity via Jupiter, Solana's leading aggregator. Live open data.

Block number closest to a date and time on EVM chains (ethereum, base, arbitrum, optimism, polygon, bsc, avax...), with the block's own timestamp. For historical state queries and event filters.

Resolve a Solana Name Service .sol domain to its owner wallet, read directly on-chain (NFT-tokenized domains resolve to the NFT holder).

ENS profile: resolved address plus public text records (avatar, description, url, twitter, github, telegram, discord, email).

ERC-20 allowance lookup: how much a spender can move from an owner's balance, flagging unlimited approvals.

First recorded price of one or more tokens and its date (when it started trading), with current price and the multiple and % change since then. Symbols (BTC, ETH, SOL...) or chain:contract ids. DefiLlama data.

Live status of Bitcoin, Solana and 12 EVM chains (Ethereum, Base, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic, Unichain): latest block, seconds since last block, gas and whether each network is ok, slow or halted.

Current mid price of every Hyperliquid asset, or the ones you ask for (BTC, ETH, SOL, HYPE...), in one fast and cheap call.

Translates a 4-byte function selector (e.g. 0xa9059cbb) or a 32-byte event topic into its human-readable signature (e.g. transfer(address,uint256)). Essential for an agent reading or verifying transactions. Live from 4byte.directory.