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Get native ETH balance of any Ethereum address. Returns balance in wei and ETH.","inputSchema":{"properties":{"address":{"description":"0x-prefixed EVM address","type":"string"}},"required":["address"],"type":"object"},"name":"chain_balance"},{"description":"Paid ($0.0029). Get the latest Ethereum mainnet block number. Returns block height and timestamp.","inputSchema":{"properties":{},"type":"object"},"name":"chain_block_number"},{"description":"Paid ($0.0029). Get the deployed bytecode at an address. Returns hex bytecode (empty = EOA, non-empty = contract). Useful for distinguishing contracts from wallets.","inputSchema":{"properties":{"address":{"description":"0x-prefixed EVM address","type":"string"}},"required":["address"],"type":"object"},"name":"chain_code"},{"description":"Paid ($0.008). Resolve a .eth ENS name to its Ethereum address via the universal resolver.","inputSchema":{"properties":{"name":{"description":"ENS name (e.g. vitalik.eth)","type":"string"}},"required":["name"],"type":"object"},"name":"chain_ens_resolve"},{"description":"Paid ($0.0029). Get ERC-20 token balance via balanceOf. Returns balance in raw and human-readable form.","inputSchema":{"properties":{"address":{"description":"0x-prefixed wallet address","type":"string"},"token":{"description":"0x-prefixed ERC-20 token contract address","type":"string"}},"required":["token","address"],"type":"object"},"name":"chain_erc20_balance"},{"description":"Paid ($0.0029). Get the current Ethereum mainnet gas price. Returns base fee, priority fee, and max fee in wei and gwei. Useful for estimating transaction costs.","inputSchema":{"properties":{},"type":"object"},"name":"chain_gas_price"},{"description":"Paid ($0.0029). Get the next transaction nonce for an Ethereum address.","inputSchema":{"properties":{"address":{"description":"0x-prefixed EVM address","type":"string"}},"required":["address"],"type":"object"},"name":"chain_nonce"},{"description":"Paid ($0.008). Get Ethereum transaction details by hash. Returns from, to, value, gas used, status, block info.","inputSchema":{"properties":{"hash":{"description":"0x-prefixed 64-hex transaction hash","type":"string"}},"required":["hash"],"type":"object"},"name":"chain_tx"},{"description":"Paid ($0.008). Get the receipt of a confirmed transaction. Returns status (success/fail), gas used, logs, contract address if deployment.","inputSchema":{"properties":{"hash":{"description":"0x-prefixed 64-hex transaction hash","type":"string"}},"required":["hash"],"type":"object"},"name":"chain_tx_receipt"},{"description":"Paid ($0.0029). Validate an IBAN: ISO 13616 structure, country registration, length, MOD 97-10 checksum. 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