OERadio MCP Server

Public MCP (Model Context Protocol) server providing amateur radio tools and calculations for IARU Region 1 operators.

Endpoint: https://oeradio-mcp.oeradio.at/mcp Author: OE8YML License: MIT

What is MCP?

Model Context Protocol (MCP) is an open standard that allows AI assistants to use external tools. Originally developed by Anthropic, MCP is now supported by Claude, ChatGPT, and Gemini. With this server, you can ask your AI assistant questions like "What are the band limits for 20m?" or "How long should my dipol be for 14.2 MHz?" and get instant calculations.

Supported AI Assistants

Platform	MCP Support	Notes
Claude Desktop	Yes	Full support
Claude Code (CLI)	Yes	Full support
ChatGPT Desktop	Yes	Requires Developer Mode (Pro/Plus/Team/Enterprise)
Gemini CLI	Yes	Since December 2025
claude.ai (web)	No	Desktop app only
chatgpt.com (web)	No	Desktop app only

Available Tools

Tool	Description
`get_band_plan`	Get IARU Region 1 band plan for a specific band
`list_all_bands`	List all amateur radio bands
`check_frequency`	Check if a frequency is within amateur bands
`calculate_eirp`	Calculate EIRP/ERP from power, cable loss, and antenna gain
`calculate_cable_loss`	Calculate coaxial cable attenuation
`compare_cables`	Compare all cable types at a given frequency and length
`calculate_battery_runtime`	Calculate battery runtime for portable operation
`get_antenna_gain`	Look up typical antenna gain values
`calculate_wavelength`	Calculate wavelength and antenna lengths
`calculate_swr_loss`	Calculate power loss from SWR mismatch
`convert_power`	Convert between Watt, dBm, and dBW

Available Resources

URI	Description
`bandplan://iaru-region1/complete`	Complete IARU Region 1 band plan
`cables://coaxial/all`	Attenuation data for all coaxial cables
`antennas://gains/all`	Typical antenna gain values

Supported Data

Bands (IARU Region 1)

2200m, 630m, 160m, 80m, 60m, 40m, 30m, 20m, 17m, 15m, 12m, 10m, 6m, 2m, 70cm, 23cm, 13cm

Coaxial Cables

RG58, RG213, H2000Flex, Aircell7, Ecoflex10, Ecoflex15, LMR400, LMR600

Antenna Types

Dipol, Groundplane, Vertical, Yagi (3/5/7 elements), Quad (2 elements), J-Pole, Slim Jim, Collinear (X50/X200/X510)

Client Configuration

Claude Desktop

Add to your configuration file:

Windows: %APPDATA%\Claude\claude_desktop_config.json
Mac: ~/Library/Application Support/Claude/claude_desktop_config.json
Linux: ~/.config/claude/claude_desktop_config.json

{
  "mcpServers": {
    "oeradio": {
      "type": "streamable-http",
      "url": "https://oeradio-mcp.oeradio.at/mcp"
    }
  }
}

Claude Code (CLI)

Add to ~/.config/claude/settings.json:

{
  "mcpServers": {
    "oeradio": {
      "type": "streamable-http",
      "url": "https://oeradio-mcp.oeradio.at/mcp"
    }
  }
}

ChatGPT (Developer Mode)

Requires ChatGPT Pro, Plus, Team, or Enterprise account.

Go to Settings > Connectors > Advanced
Enable Developer Mode
Click Create and enter:
- Name: OERadio
- URL: https://oeradio-mcp.oeradio.at/mcp
In chat: Click + > More > Developer mode and select OERadio

Gemini CLI

Add the server using the command:

gemini mcp add --transport http oeradio https://oeradio-mcp.oeradio.at/mcp

Or add to your settings.json:

{
  "mcpServers": {
    "oeradio": {
      "url": "https://oeradio-mcp.oeradio.at/mcp"
    }
  }
}

Clients with stdio only

{
  "mcpServers": {
    "oeradio": {
      "command": "npx",
      "args": ["mcp-remote", "https://oeradio-mcp.oeradio.at/mcp"]
    }
  }
}

API Endpoints

Endpoint	Method	Description
`/`	GET	Server info and tool list
`/health`	GET	Health check
`/mcp`	POST	MCP JSON-RPC requests
`/mcp`	GET	MCP SSE stream (with session ID)
`/mcp`	DELETE	End session

Self-Hosting

Requirements

Node.js 20+
Docker (optional)

Docker

docker build -t oeradio-mcp .
docker run -d -p 3000:3000 --name oeradio-mcp oeradio-mcp

Docker Compose

docker compose up -d

Manual

npm install
npm run build
npm start

Development

npm install
npm run dev

Registry

This server is published to the MCP Registry:

Name: io.github.achildrenmile/oeradio-mcp
Version: 1.0.0

License

MIT

73 de OE8YML

oeradio-mcp