MaCalculatriceEnLigne MCP server

macalc — Everyday Calculator MCP Server

A curated core of 15 well-scoped calculator tools — income tax (France, US, UK, Canada), gross-to-net salary, mortgage, compound interest, loans, VAT, percentages, BMI, TDEE — with on-demand access to the full macalc catalog of 446 calculators (22 categories, 8 countries' tax systems) through a discovery + dispatcher workflow. Free, no API key required.

Core tools (default profile)

Need something not in the core (notary fees, concrete volume, VMA, pet food…)? listbundles → getbundletools(bundleid) → callanycalculator(tool_name, arguments).

Prefer the raw 446-tool listing? Set the env var MACALCMCPFULL=1.

Quick Start

Two install modes — pick whichever your MCP client supports.

Option A — Remote (Streamable HTTP, zero install)

For clients with native remote MCP support (Claude Desktop ≥ 0.8, Cursor, Windsurf, VS Code MCP, etc.)

{
  "mcpServers": {
    "macalc": {
      "url": "https://macalculatriceenligne.com/api/mcp"
    }
  }
}

Option B — Local stdio proxy (works everywhere)

For clients that only speak stdio, or sandboxed environments:

{
  "mcpServers": {
    "macalc": {
      "command": "npx",
      "args": ["-y", "macalc-mcp"]
    }
  }
}

Or with Docker:

{
  "mcpServers": {
    "macalc": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "ghcr.io/tresor4k/macalc-mcp:latest"]
    }
  }
}

That's it. No API key, no auth, no setup.

Note: Option A (remote URL) serves the full 446-tool catalog directly.

Option B (this npm wrapper) serves the curated 15-tool core profile by default —

lighter on your agent's context window — with the full catalog one dispatcher call away.

What's Inside — The Full Catalog

Shortened. The full README is on GitHub.