Size hybrid solar PV, wind, battery, diesel and grid systems: hourly simulation, NPC ranking.
Connect Runs on your machine
claude mcp add helionyx -e HNX_WORKSPACE=<HNX_WORKSPACE> -e HNX_OFFLINE=<HNX_OFFLINE> -e HNX_REOPT_API_KEY=<HNX_REOPT_API_KEY> -- uvx helionyx==0.3.0{
"mcpServers": {
"helionyx": {
"command": "uvx",
"args": [
"helionyx==0.3.0"
],
"env": {
"HNX_WORKSPACE": "<HNX_WORKSPACE>",
"HNX_OFFLINE": "<HNX_OFFLINE>",
"HNX_REOPT_API_KEY": "<HNX_REOPT_API_KEY>"
}
}
}
}{
"mcpServers": {
"helionyx": {
"command": "uvx",
"args": [
"helionyx==0.3.0"
],
"env": {
"HNX_WORKSPACE": "<HNX_WORKSPACE>",
"HNX_OFFLINE": "<HNX_OFFLINE>",
"HNX_REOPT_API_KEY": "<HNX_REOPT_API_KEY>"
}
}
}
}{
"servers": {
"helionyx": {
"type": "stdio",
"command": "uvx",
"args": [
"helionyx==0.3.0"
],
"env": {
"HNX_WORKSPACE": "<HNX_WORKSPACE>",
"HNX_OFFLINE": "<HNX_OFFLINE>",
"HNX_REOPT_API_KEY": "<HNX_REOPT_API_KEY>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
HNX_WORKSPACEOptional | Workspace directory for the database, artefacts and exports (default ~/.helionyx) |
HNX_OFFLINEOptional | Set to 1 to use only cached and bundled data (no network calls) |
HNX_REOPT_API_KEYOptional, secret | Optional NREL REopt API key for the reopt cross-check solver |
Details
| Package | [email protected] (PYPI, stdio) |
| First published | 7 Oct 2026 |
| Last updated | 7 Oct 2026 |
| Registry name | io.github.Jayzilva/helionyx |
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