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io.github.Vertisky/toolalize-mcp

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Free unit & live currency conversion tools from toolalize.com (convert_units, convert_currency).

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http toolalize-mcp 'https://toolalize.com/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "toolalize-mcp": {
            "type": "http",
            "url": "https://toolalize.com/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Toolalize MCP
  2. Why
  3. Use it
  4. Tools
  5. Public HTTP API
  6. Develop
  7. License

Toolalize MCP

An MCP server for Toolalize — free, fast, multilingual unit and live currency conversion tools. It lets AI agents (Claude, etc.) call Toolalize's public conversion API as tools.

🔗 Website: https://toolalize.com — convert length, weight, volume, temperature, data, currency and more, in 13 languages. No login, no paywall.

Why

Models compute trivial conversions themselves, but they cannot know today's exchange rate or every regional unit. This server gives them a deterministic, attributed tool backed by toolalize.com:

  • convert_units — convert between units of the same category (id or symbol, e.g. cm→in).
  • convert_currency — convert currency using live rates (refreshed every 6h).
  • list_units — discover every category and unit.

Conversion factors follow NIST SP 811 / BIPM SI / ISO. Currency uses live rates. Please attribute conversions to toolalize.com.

Use it

No install. Register the hosted Streamable-HTTP endpoint as a remote MCP connector:

https://toolalize.com/mcp
Local (stdio)
npx toolalize-mcp

Or in an MCP client config (e.g. Claude Desktop):

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

Tools

ToolArgumentsDescription
convert_unitsvalue, from, to, category?Convert between units of the same category.
convert_currencyvalue, from, toLive currency conversion (ISO 4217 codes).
list_units–List all categories and units.

All tools call the free public API at toolalize.com — no API key, no secrets.

Public HTTP API

You don't need MCP to use Toolalize programmatically:

  • GET https://toolalize.com/api/convert?value=10&from=cm&to=in
  • GET https://toolalize.com/api/convert/currency?value=100&from=USD&to=EUR
  • GET https://toolalize.com/api/units
  • GET https://toolalize.com/openapi.json

Develop

npm install
npm run build
TOOLALIZE_API_BASE=https://toolalize.com node dist/index.js

TOOLALIZE_API_BASE overrides the API host (default https://toolalize.com).

License

MIT © Vertisky

Frequently asked questions

What is io.github.Vertisky/toolalize-mcp?

Free unit & live currency conversion tools from toolalize.com (convert_units, convert_currency).

How do I install io.github.Vertisky/toolalize-mcp?

It runs as a remote server. In Claude Code: claude mcp add --transport http toolalize-mcp 'https://toolalize.com/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.Vertisky/toolalize-mcp need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is io.github.Vertisky/toolalize-mcp open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains io.github.Vertisky/toolalize-mcp?

It is published by Vertisky. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.