exact-calc MCP Server: Install & Setup

Install exact-calc in Claude Code

Claude Code

claude mcp add exact-calc -- uvx exact-calc-mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

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

Exact arithmetic for AI agents. Two independent engines cross-check every result.

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

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

Run: claude mcp add exact-calc -- uvx exact-calc-mcp

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