Keccak-256 hash (MCP tool "keccak256"), $0.01 USDC per call on Base mainnet ($0....
https://mcp.naxytra.com/mcp/http402/keccak256Overview
Keccak-256 hash (MCP tool "keccak256"), $0.01 USDC per call on Base mainnet ($0.001 on Base Sepolia), paid with x402; charged only if the call succeeds. Ethereum keccak256 of the input: returns the 32-byte digest and the 4-byte selector. encoding auto (default) hashes 0x-hex input as bytes and anything else as UTF-8 text; force utf8 or hex explicitly. The empty string is allowed. Up to 250000 bytes.