Koskamo

calc-mcp

An open-source MCP server providing 21 deterministic tools for AI agents to handle calculations, cryptographic hashing, encoding, date arithmetic, and random generation accurately without hallucination. It runs locally via npx, requires no API keys, and supports clients like Claude Desktop and VS Code.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

calc-mcp logo, by coo-quackCommunity listingLocal stdioSource reviewed; not executedPublished by coo-quack
You need:No API key — No account or API key required for calc-mcp itself; requires Node.js
Vendor documentation

What you can do with it

  • Perform deterministic math and unit conversions
  • Generate cryptographically secure random UUIDs and passwords
  • Calculate SHA-256 hashes and HMAC signatures
  • Perform accurate date arithmetic and timezone conversions

Source and maintenance

Community listingRegistry 2.1.5
mcp-registry: io.github.coo-quack/calc-mcp@2.1.5Source repository
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@coo-quack/calc-mcp 2.1.5

npm
@coo-quack/calc-mcp package definition
{
  "version": "2.1.5",
  "transport": "stdio",
  "identifier": "@coo-quack/calc-mcp",
  "registryType": "npm"
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "calc-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@coo-quack/calc-mcp@2.1.5"
      ]
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "calc-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@coo-quack/calc-mcp@2.1.5"
      ]
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "calc-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@coo-quack/calc-mcp@2.1.5"
      ]
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "calc-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@coo-quack/calc-mcp@2.1.5"
      ]
    }
  }
}

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