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io.github.daedalus/mcp-rpn

Official registry Other

MCP server that exposes an RPN calculator

Source code 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).

PYPI package mcp-rpn
Claude Code 
claude mcp add mcp-rpn -- uvx mcp-rpn==0.1.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "mcp-rpn": {
            "command": "uvx",
            "args": [
                "mcp-rpn==0.1.1"
            ]
        }
    }
}

Documentation

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

Contents
  1. mcp-rpn
  2. Install
  3. Usage
  4. MCP Tools
  5. Development
  6. MCP Registry

mcp-rpn

MCP server that exposes an RPN calculator

Install

pip install mcp-rpn

Usage

mcp-rpn

The server uses stdio transport for MCP protocol communication.

MCP Tools

evaluate

Evaluate an RPN (Reverse Polish Notation) expression.

{
  "name": "evaluate",
  "arguments": {
    "expression": "3 4 +",
    "show_stack": true
  }
}

Operators:

  • + - Add
  • - - Subtract
  • - - Multiply
  • / - Divide
  • ** - Power
  • % - Modulo

Commands:

  • clear - Clear the stack
  • dup - Duplicate top of stack
  • swap - Swap top two elements

Examples:

  • 3 4 + returns 7
  • 10 5 2 + * 2 - returns 32
  • 3 2 / returns 1.5
clear

Clear the calculator stack.

{
  "name": "clear",
  "arguments": {}
}

Development

git clone https://github.com/daedalus/mcp-rpn.git
cd mcp-rpn
pip install -e ".[test]"

# run tests
pytest

# format
ruff format src/ tests/

# lint
ruff check src/ tests/

# type check
mypy src/

MCP Registry

mcp-name: io.github.daedalus/mcp-rpn

Frequently asked questions

What is io.github.daedalus/mcp-rpn?

MCP server that exposes an RPN calculator

How do I install io.github.daedalus/mcp-rpn?

It runs on your machine. In Claude Code: claude mcp add mcp-rpn -- uvx mcp-rpn==0.1.1. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.daedalus/mcp-rpn 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.daedalus/mcp-rpn open source?

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

Who maintains io.github.daedalus/mcp-rpn?

It is published by daedalus. 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.