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io.github.daedalus/mcp-rpn

MCP server that exposes an RPN calculator

Open source Open in the app JSON README (API)

About

MCP server that exposes an RPN calculator

Details

Kind
MCP servers
Topic
No topic detected
Publisher
daedalus
Origin
official
Category
ferramentas
Transport
local
Version
0.1.1
Last push
2026-04-22T14:57:16Z
Repository state
ativo
Language
Python
License
MIT
Added
2026-08-29 03:02:40
Updated
2026-08-29 03:02:40
Origin id
io.github.daedalus/mcp-rpn

README

# mcp-rpn

> MCP server that exposes an RPN calculator

[![PyPI](https://img.shields.io/pypi/v/mcp-rpn.svg)](https://pypi.org/project/mcp-rpn/)
[![Python](https://img.shields.io/pypi/pyversions/mcp-rpn.svg)](https://pypi.org/project/mcp-rpn/)
[![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)

## Install

```bash
pip install mcp-rpn
```

## Usage

```bash
mcp-rpn
```

The server uses stdio transport for MCP protocol communication.

## MCP Tools

### evaluate

Evaluate an RPN (Reverse Polish Notation) expression.

```json
{
  "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.

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

## Development

```bash
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

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