Basename Resolution x402 REST usage
Resolve a Basename to an address or an address to its primary Basename
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Resolve a Basename to an address or an address to its primary Basename
Get ETH and USDC balance for a wallet address
Live balances of a Base wallet: native ETH and US-dollar stablecoin, plus its transaction count.
Current EIP-1559 gas fees for Ethereum, Base, Arbitrum, Optimism or Polygon: next base fee, slow/standard/fast priority and max fee in gwei, block utilisation and the cost of a plain transfer (L2 L1-data fees excluded)....
Convert an integer between number bases (radix 2-36), e.g. binary↔hex↔decimal. Arbitrary size via BigInt.
Transaction details and receipt by hash: status, block, from, to, value, gas used, effective gas price and decoded ERC-20 transfers.
Pure-CPU helper: turn a B20 feature string (e.g. base.b20_asset) into its bytes32 feature id and ready-to-send isActivated(bytes32) calldata for the Activation Registry. No network egress.
List a wallet's native ETH and USDC balances with human-readable amounts. Canonical wallet-balance contract for autonomous agents: address plus optional CAIP-2 chain.
Get current gas price information (base fee, priority fee suggestion, gas price)
Token Quick Check: Base contract facts -- name, supply, owner, code. Not financial advice. Returns: a token verdict preview on one token contract: the contract facts the full verdict reads -- code size, name, symbol, dec...
Verify that a Base transaction paid what you expected. Give a tx hash; get status (success/reverted/pending), confirmations, from/to, ETH value, L2 fee and every ERC-20 Transfer decoded with symbol and decimals. Optional...
Native ETH / wallet balance for an address on any EVM chain: native balance (wei + ether), transaction count (nonce), and whether it's a contract or an externally-owned account (with deployed code size). Reads live on-ch...
An EVM chain's pending block (Ethereum, Base, Arbitrum, Optimism, Polygon): transaction count, priority-fee and gas-price percentiles, most-called contracts and largest native transfers. Use to price gas.
Token info and total supply for any ERC20 on Ethereum, Base, Arc or BNB Chain: name, symbol, decimals and total supply (raw and in token units), read at a named block. A contract that is not an ERC20 is refused before an...
ERC-20 token approval check. Check how much of a wallet's ERC-20 token a spender contract is approved to move on Base: the raw and formatted allowance, the token symbol and decimals, and whether the approval is unlimited...
Is this address a contract or a wallet? Checks any Base address: EOA, EIP-7702 delegated wallet or smart contract, bytecode size, ETH balance and ERC-20 symbol. Cheap safety check before sending funds.
Basename and ENS resolver on Base: resolve name.base.eth to an address, or an address to its primary Basename (reverse names returned only when verified).
ERC-20 allowance and token approval check on Base: how much a spender contract is approved to move from an owner wallet, with unlimited-approval detection. Run it before a swap, a bridge or a transferFrom.
ERC-20 token info on Base: name, symbol, decimals and total supply of any token contract, read live on-chain. Check a token before you trade or accept it.
Gas price on Base right now: gas price, base fee and priority fee in gwei, plus the cost of a simple ETH transfer. Decide whether to transact now or wait. No input needed.
Live crypto prices: USD spot for BTC, ETH and SOL in one call, fetched per call (not cached), so the figure is the number right now. A cheap, high-frequency data lane for x402 buyers budgeting in the unit they pay with....
Current Base network gas price, read live from a public Base RPC node (eth_gasPrice) and returned in both wei and gwei with the snapshot block it was read at.
Resolve ENS (.eth) on Ethereum and Basenames (.base.eth) on Base, forward or reverse. Returns address, name, source, forward_verified, optional avatar.
The chain clock on Base: latest block number and its timestamp, plus the node's current time and the lag between them. No parameters. No third-party API, no cache.