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

Radio Calculation 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

Austrian Callsign Tools

Tool	Description
callsign_lookup	Search Austrian callsigns (fb.gv.at, QRZ.com, HamQTH fallback)
callsign_available	Check if a suffix is available across Austrian districts
callsign_suggest	Generate callsign suggestions based on name
callsign_validate	Validate callsigns against Austrian rules
callsign_database_info	Show database version and statistics

The callsign tools use the official Austrian callsign list from fb.gv.at as the primary data source. External lookups (QRZ.com, HamQTH) include warnings when a callsign is found externally but not in the official list.

Directory Tools

Tool	Description
list_oeradio_tools	List all OERadio.at amateur radio web tools with URLs

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
oeradio://tools/all	Complete OERadio.at tools directory
callsigns://districts	Austrian amateur radio districts (OE1-OE9)
callsigns://license-classes	Austrian license class information

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)

Austrian Callsign Data

• Source: Official callsign list from fb.gv.at (Fernmeldebüro)
• Updates: Automatic monthly updates via GitHub Actions
• Districts: OE1 (Wien), OE2 (Salzburg), OE3 (NÖ), OE4 (Burgenland), OE5 (OÖ), OE6 (Steiermark), OE7 (Tirol), OE8 (Kärnten), OE9 (Vorarlberg)
• License Classes: Class 1 (CEPT full), Class 3 (CEPT restricted), Class 4 (Beginner)

The callsign database is updated automatically on the 2nd of each month and contains ~7,500 entries.

OERadio.at Web Tools

All tools are available at https://oeradio.at/werkzeuge/

Calculators (Blick-Series):

Tool	URL	Description
AkkuBlick	https://akkublick.oeradio.at	Battery planner for portable operation
AntennenBlick	https://antennenblick.oeradio.at	Antenna information and calculations
BandBlick	https://bandblick.oeradio.at	IARU Region 1 band plan viewer
KabelBlick	https://kabelblick.oeradio.at	Coaxial cable attenuation calculator
StrahlBlick	https://strahlblick.oeradio.at	RF safety calculator (EIRP)
RelaisBlick	https://relaisblick.oeradio.at	Austrian repeater map

Learning Tools:

Tool	URL	Description
OE-CEPT	https://oecept.oeradio.at	Austrian amateur radio exam trainer
CQ...Nothing	https://cqnothing.oeradio.at	HF troubleshooting scenario trainer
FirstContact	https://firstcontact.oeradio.at	Shortwave beginner tutorial
PrefixPlay	https://prefixplay.oeradio.at	Callsign prefix learning game
QBlitz	https://qblitz.oeradio.at	Q-codes rapid trainer
QSOBuddy	https://qsobuddy.oeradio.at	QSO conversation practice
MorseFleet	https://morsefleet.oeradio.at	Morse code Battleship game (10-25 WPM)

Utilities:

Tool	URL	Description
QSL Card Generator	https://qsl.oeradio.at	Create custom QSL confirmation cards
FunkPilot	https://funkpilot.oeradio.at	AI assistant for amateur radio
Dobratschrunde	https://dobratschrunde.oeradio.at	Guestbook for Dobratsch radio round

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.

1. Go to Settings > Connectors > Advanced
2. Enable Developer Mode
3. Click Create and enter:
   • Name: OERadio
   • URL: https://oeradio-mcp.oeradio.at/mcp
4. 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

Links

• Website: https://oeradio.at
• MCP Endpoint: https://oeradio-mcp.oeradio.at/mcp
• Health Check: https://oeradio-mcp.oeradio.at/health
• GitHub: https://github.com/achildrenmile/oeradio-mcp

License

MIT

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