NatalChart.AI MCP MCP server

An official MCP server by NatalChart.AI that connects AI assistants like Claude and ChatGPT to the Swiss Ephemeris for precise astrological calculations. It allows agents to compute natal charts, transits, synastry, and solar returns using real astronomical data rather than guessing, ensuring accuracy for birth data analysis.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by NatalChart.AI

MCP endpoint (Streamable HTTP)

https://www.natalchart.ai/mcp

Vendor documentation

What you can do with it

Compute a full natal chart from birth date, time, and location
Analyze compatibility between two charts using synastry aspects
Calculate daily transits and sky events for a specific date
Find the best cities for relocation based on astrological scores

Tools advertised by the last live check:

natal_chart
daily_transits
sky
usage
transits
synastry
solar_return
best_days
location_score
best_cities

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http natalchart-ai-mcp https://www.natalchart.ai/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add natalchart-ai-mcp --url https://www.natalchart.ai/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable natalchart-ai-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "natalchart-ai-mcp": {
      "url": "https://www.natalchart.ai/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "natalchart-ai-mcp": {
      "type": "streamableHttp",
      "url": "https://www.natalchart.ai/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start natalchart-ai-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "natalchart-ai-mcp": {
      "type": "http",
      "url": "https://www.natalchart.ai/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http natalchart-ai-mcp https://www.natalchart.ai/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "natalchart-ai-mcp": {
      "url": "https://www.natalchart.ai/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "natalchart-ai-mcp": {
      "serverUrl": "https://www.natalchart.ai/mcp"
    }
  }
}

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