wspr-mcp

MCP server for WSPR (Weak Signal Propagation Reporter) beacon data — live spots, band activity, top beacons, propagation paths, SNR trends, and more through any MCP-compatible AI assistant.

Data from wspr.live (~2.7 billion spots, 2008-present). Part of the qso-graph project. No authentication required — all public data.

Install

uvx wspr-mcp            # run it; nothing to install

Tools

What is WSPR?

WSPR beacons transmit a 2-minute encoded signal at very low power (typically 200 mW to 5 W). Each decoded spot proves a propagation path exists between two locations on a specific band. With thousands of beacons worldwide transmitting 24/7, WSPR provides continuous, automated propagation monitoring across all HF bands.

Good Neighbour Policy

wspr.live is a volunteer-run service that mirrors all wsprnet.org data into a public ClickHouse database. We take our responsibility as a good neighbour seriously:

If wspr.live is down or overloaded, the circuit breaker backs off automatically. We don't retry in a tight loop.

Quick Start

No credentials needed — just install and configure your MCP client.

Configure your MCP client

Claude Desktop

Add to claude_desktop_config.json (~/Library/Application Support/Claude/ on macOS, %APPDATA%\Claude\ on Windows):

{
  "mcpServers": {
    "wspr": {
      "command": "uvx",
      "args": ["wspr-mcp"]
    }
  }
}

Claude Code

Add to .claude/settings.json:

{
  "mcpServers": {
    "wspr": {
      "command": "uvx",
      "args": ["wspr-mcp"]
    }
  }
}

ChatGPT Desktop

{
  "mcpServers": {
    "wspr": {
      "command": "uvx",
      "args": ["wspr-mcp"]
    }
  }
}

Cursor

Add to .cursor/mcp.json (project-level) or ~/.cursor/mcp.json (global):

{
  "mcpServers": {
    "wspr": {
      "command": "uvx",
      "args": ["wspr-mcp"]
    }
  }
}

VS Code / GitHub Copilot

Add to .vscode/mcp.json in your workspace:

{
  "servers": {
    "wspr": {
      "command": "uvx",
      "args": ["wspr-mcp"]
    }
  }
}

Gemini CLI

Add to ~/.gemini/settings.json (global) or .gemini/settings.json (project):

{
  "mcpServers": {
    "wspr": {
      "command": "uvx",
      "args": ["wspr-mcp"]
    }
  }
}

Ask questions

"Show me recent WSPR spots on 20m"

"What bands are open right now?"

"Who are the top WSPR beacons on 20m today?"

"What are the longest WSPR paths in the last 24 hours?"

"Is there propagation between Idaho (DN13) and central Europe (JN48)?"

"Any WSPR paths between DN13 and Bouvet (JD15)?" (auto-widens to DN↔JD if no exact match)

"What's happening in grid square JN48?"

"How's the SNR trending between K9AN and G8JNJ on 20m?"

"Who are the best WSPR receivers sorted by distance?"

Testing Without Network

WSPR_MCP_MOCK=1 wspr-mcp

MCP Inspector

wspr-mcp --transport streamable-http --port 8009

Development

git clone https://github.com/qso-graph/wspr-mcp.git
cd wspr-mcp
uv sync --group dev
uv run pytest

License

GPL-3.0-or-later