Spacecraft ephemeris made easy — auto-managed SPICE kernels for heliophysics
Connect Runs on your machine
claude mcp add xhelio-spice -e XHELIO_SPICE_KERNEL_DIR=<XHELIO_SPICE_KERNEL_DIR> -- uvx xhelio-spice==0.5.1
{
"mcpServers": {
"xhelio-spice": {
"command": "uvx",
"args": [
"xhelio-spice==0.5.1"
],
"env": {
"XHELIO_SPICE_KERNEL_DIR": "<XHELIO_SPICE_KERNEL_DIR>"
}
}
}
}
{
"mcpServers": {
"xhelio-spice": {
"command": "uvx",
"args": [
"xhelio-spice==0.5.1"
],
"env": {
"XHELIO_SPICE_KERNEL_DIR": "<XHELIO_SPICE_KERNEL_DIR>"
}
}
}
}
{
"servers": {
"xhelio-spice": {
"type": "stdio",
"command": "uvx",
"args": [
"xhelio-spice==0.5.1"
],
"env": {
"XHELIO_SPICE_KERNEL_DIR": "<XHELIO_SPICE_KERNEL_DIR>"
}
}
}
}
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 |
|---|---|
XHELIO_SPICE_KERNEL_DIROptional | Override the default kernel cache directory (~/.xhelio_spice/kernels/) |
Details
| Package | [email protected] (PYPI, stdio) |
| First published | 12 Mar 2026 |
| Last updated | 12 Mar 2026 |
| Registry name | io.github.huangzesen/xhelio-spice |
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