Solar
Solar indices and space weather MCP server. SFI, SSN, Kp, DSCOVR, NOAA alerts.
Runs on your machine from its package; the steps are below.
What it does
- Reads
- Writes
- High impact
At most: only reads or looks up information.
What it costs
FreeOdel charges nothing per call. The publisher may charge for its own service.
Runs locally over stdio
This server isn't hosted — your MCP client launches it from a package registry. Use one of the commands below, or drop the config into your client (e.g. Claude Desktop).
Run
uvx solar-mcp
MCP client config
{
"mcpServers": {
"solar": {
"command": "uvx",
"args": [
"solar-mcp"
]
}
}
}solar-mcp
MCP server for space weather and HF propagation conditions — live solar flux, Kp index, DSCOVR solar wind, X-ray flux, alerts, 27-day forecast, and band-by-band outlook through any MCP-compatible AI assistant.
Part of the qso-graph project. No authentication required — all data from NOAA SWPC public endpoints.
Install
uvx solar-mcp # run it; nothing to install
Tools
| Tool | Description |
|---|---|
solar_conditions | Current SFI, Kp, and NOAA R/S/G space weather scales |
solar_forecast | 27-day SFI and Kp forecast from NOAA |
solar_alerts | Active space weather alerts and warnings |
solar_wind | Real-time DSCOVR L1 solar wind (Bz, speed, density) |
solar_xray | GOES X-ray flux and solar flare classification |
solar_band_outlook | HF band-by-band propagation assessment (160m-6m) |
get_version_info | Service version + upstream spec version (fleet identity attestation) |
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": {
"solar": {
"command": "uvx",
"args": ["solar-mcp"]
}
}
}
Claude Code
Add to .claude/settings.json:
{
"mcpServers": {
"solar": {
"command": "uvx",
"args": ["solar-mcp"]
}
}
}
ChatGPT Desktop
{
"mcpServers": {
"solar": {
"command": "uvx",
"args": ["solar-mcp"]
}
}
}
Cursor
Add to .cursor/mcp.json (project-level) or ~/.cursor/mcp.json (global):
{
"mcpServers": {
"solar": {
"command": "uvx",
"args": ["solar-mcp"]
}
}
}
VS Code / GitHub Copilot
Add to .vscode/mcp.json in your workspace:
{
"servers": {
"solar": {
"command": "uvx",
"args": ["solar-mcp"]
}
}
}
Gemini CLI
Add to ~/.gemini/settings.json (global) or .gemini/settings.json (project):
{
"mcpServers": {
"solar": {
"command": "uvx",
"args": ["solar-mcp"]
}
}
}
Ask questions
"What are the current solar conditions?"
"Is the solar wind causing any geomagnetic disturbance?"
"What's the 27-day solar forecast look like?"
"Are any bands open right now on HF?"
"Are there any active space weather alerts?"
"What class solar flare is happening?"
Data Sources
Every value comes from a public NOAA Space Weather Prediction Center endpoint at services.swpc.noaa.gov:
| Data | Endpoint | Used by |
|---|---|---|
| 10.7 cm solar flux (SFI) | /products/summary/10cm-flux.json | solar_conditions, solar_band_outlook |
| Planetary K-index | /products/noaa-planetary-k-index.json | solar_conditions, solar_band_outlook |
| NOAA R/S/G scales | /products/noaa-scales.json | solar_conditions |
| Space weather alerts | /products/alerts.json | solar_alerts |
| 27-day outlook | /text/27-day-outlook.txt | solar_forecast |
| Solar wind (real-time, 1 minute) | /json/rtsw/rtsw_wind_1m.json, /json/rtsw/rtsw_mag_1m.json | solar_wind |
| GOES X-ray flux | /json/goes/primary/xrays-6-hour.json | solar_xray |
Testing Without Network
SOLAR_MCP_MOCK=1 solar-mcp
MCP Inspector
solar-mcp --transport streamable-http --port 8008
Development
git clone https://github.com/qso-graph/solar-mcp.git
cd solar-mcp
uv sync --group dev
uv run pytest
License
GPL-3.0-or-later
