{"ok":true,"tool":"keccak256","title":"Keccak-256 hash","endpoint":"https://mcp.naxytra.com/mcp/http402/keccak256","usage":"POST a JSON-RPC tools/call (params.name may be omitted); unpaid answers HTTP 402 with the price","inputSchema":{"type":"object","properties":{"data":{"type":"string","description":"Data to hash, e.g. transfer(address,uint256) or 0xdeadbeef."},"encoding":{"type":"string","enum":["auto","utf8","hex"],"description":"auto (default), utf8, or hex."}},"required":["data"],"additionalProperties":false},"x402":"https://mcp.naxytra.com/.well-known/x402"}