Keccak

An MCP (Model Context Protocol) server that provides Keccak cryptographic hash tools.

Tools

keccak_hash

Compute a Keccak hash of the given input.

Parameters:

Parameter	Type	Default	Description
input	string	—	The input string or hex-encoded bytes to hash
variant	enum	keccak-256	Keccak variant: keccak-224, keccak-256, keccak-384, keccak-512
encoding	enum	utf8	Input encoding: utf8 (UTF-8 string) or hex (hex-encoded bytes)

Response:

{
  "variant": "keccak-256",
  "encoding": "utf8",
  "input": "hello",
  "hash": "0x1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8"
}

Note: keccak-256 is the variant used by Ethereum (distinct from SHA3-256).

Installation

npm install
npm run build

Usage

Run directly

npm start

Use as a CLI binary

node dist/index.js

MCP Client Configuration

Add the server to your MCP client configuration. The server communicates over stdio.

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "keccak-mcp": {
      "command": "node",
      "args": ["${workspaceFolder}/dist/index.js"]
    }
  }
}

VS Code (.vscode/mcp.json)

{
  "servers": {
    "keccak-mcp": {
      "type": "stdio",
      "command": "node",
      "args": ["${workspaceFolder}/dist/index.js"]
    }
  }
}

Development

# Build TypeScript
npm run build

# Build and run
npm run dev

Dependencies

• @modelcontextprotocol/sdk — MCP server framework
• js-sha3 — Keccak / SHA-3 hash implementations

License

ISC