True Solar Time

Overview

True Solar Time is a Model Context Protocol server that corrects solar time for BaZi charts by accounting for historical daylight saving time, longitude adjustments, and the equation of time. Any MCP-compatible AI assistant can call its tools directly, letting the model decide when to apply solar time corrections during conversations or agent runs.

The server runs locally via the npm package true-solar-time-mcp, which communicates with your MCP client over stdio. No authentication is required—it works immediately after installation. Version v1.0.1 is published under the MIT license with source code available at Shann5/true-solar-time-mcp on GitHub.

True Solar Time is categorized as a Development tool on mcp.site and integrates with all MCP clients including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, and Zed. Maintainers can claim this listing to verify ownership and keep information up to date.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "true_solar_time": {
      "command": "npx",
      "args": [
        "-y",
        "true-solar-time-mcp"
      ]
    }
  }
}