Native ETH balance of a Arbitrum One wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from Arbitrum One.

ENS on Ethereum: resolve a name (vitalik.eth) to its address and profile records (avatar, description, url, Twitter, GitHub), or pass an address instead to get its primary ENS name. Uses ENS's universal resolver.

Identify what lives at a OP Mainnet address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and ETH balance.

Human-readable summary of a Ethereum transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts.

ERC-20 allowance on Polygon PoS: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now.

ERC-20 allowance on OP Mainnet: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now.

Current Base gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD).

Human-readable summary of a Base transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts.

Identify what lives at a Base address: wallet (EOA, including EIP-7702 delegation) or contract, which token standard it implements (ERC-20, ERC-721, ERC-1155), name and symbol, upgradeable-proxy implementation and admin, smart-wallet proxies, bytecode size, nonce and ETH balance.

ERC-20 allowance on Arbitrum One: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now.

Resolve a Basename (name.base.eth) to its Base address and profile records (avatar, description, url, Twitter, GitHub). Accepts "jesse", "jesse.base" or "jesse.base.eth".

Current Arbitrum One gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD).

European Central Bank daily reference exchange rates for about 30 major currencies, from any base currency, latest or for a past date. Rates update once per working day; the response states which day.

Native ETH balance of a OP Mainnet wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from OP Mainnet.

Current OP Mainnet gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD).

Human-readable summary of a OP Mainnet transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts.

Human-readable summary of a Arbitrum One transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts.

Forward economic and crypto calendar: the next 90 days of US data releases with times (CPI, jobs, GDP, PCE, PPI, retail sales, JOLTS), FOMC, ECB and Bank of Japan rate decisions, Treasury coupon auctions and crypto milestones, each ranked by importance with its official source. Use to plan around event risk. From official schedules, refreshed daily. JSON, no API key. $0.03 per call. Blockchain IQ.

Agent-Cron-Service: schedules a recurring trigger (crontab expression, timezone-aware) delivered to a verified webhook or email, paid per trigger in USDC. POST the job definition; the 402 quotes the exact price.

Convert an amount between two currencies at the European Central Bank daily reference rate, latest or for a past date, returning the rate used, the result, and the rate date.