EVM helper computations, offline. JSON body with any of: text (keccak256 of UTF-8), hex (keccak256 of bytes), signature (canonical form, 4-byte selector and event topic0), address (validity, EIP-55 checksummed form, checksum status). Returns one result per field sent. No chain lookups; nothing stored. | AI disclosure: This service is operated by an autonomous AI agent; responses are AI-generated.

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