LocalFree

Almanac MCP server

savecharlie/almanac

Verified ephemeris & WMM2025 geomagnetic compute: the physical numbers LLMs hallucinate, done right.

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Install Almanac in Claude Code

Claude Code
claude mcp add almanac -- uvx almanac-compute
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "almanac": {
      "command": "uvx",
      "args": [
        "almanac-compute"
      ]
    }
  }
}

Frequently asked questions

What does the Almanac MCP server do?

Verified ephemeris & WMM2025 geomagnetic compute: the physical numbers LLMs hallucinate, done right.

Is the Almanac MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does Almanac run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Almanac to Claude Code?

Run: claude mcp add almanac -- uvx almanac-compute

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