Ephemeris MCP

Precision Astronomical Ephemeris for AI Agents. Ephemeris MCP is a Model Context Protocol (MCP) server that provides AI agents with precision planetary positions using the Swiss Ephemeris. It runs locally over stdio via the published package.

People connecting web framework tools to Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-03-27 · ★ 4 · #41 OF 48 MAINTAINED WEB FRAMEWORK · VERIFIED 2026-08-25

AGPL-3.0 · Python servers · how we verify → /methodology

01 · Install Ephemeris MCP

Claude Code

claude mcp add scottchronicity-ephemeris-mcp -- uvx ephemeris-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "scottchronicity-ephemeris-mcp": {
      "command": "uvx",
      "args": [
        "ephemeris-mcp"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license AGPL-3.0 - declared in the repository

pypi package ephemeris-mcp - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.scottchronicity is GitHub-verified and matches the repo owner

03 · What Ephemeris MCP can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

An agent gets 1 documented tool, including get_planetary_positions.

The 1 tools it gives your agent

Extracted from the project's README - what ephemeris-mcp lets an agent do.

get_planetary_positions: - Returns precise Tropical Zodiac positions for all planets, Sun, Moon, and chart angles.

Latest releases

v1.2.0 · 2026-03-27

v1.2.0 (2026-03-27) · _This release is published under the AGPL-3.0-or-later License._ · Add MCP registry ownership verification string to README (#4, 9e3abaf) · Update license to AGPLv3 and add badges · Add Claude…

v1.1.1 · 2026-01-11

v1.1.1 (2026-01-11) · _This release is published under the MIT License._ · Give pypi read permissions in cicd · --- · Detailed Changes: v1.1.0...v1.1.1

v1.1.0 · 2026-01-11

v1.1.0 (2026-01-11) · _This release is published under the MIT License._ · Enable automated PyPI publishing · --- · Detailed Changes: v1.0.0...v1.1.0

04 · Who maintains Ephemeris MCP

ephemeris-mcp is maintained by scottchronicity. It's the only MCP server we track from this author; the repo dates to Jan 2026.

05 · Facts

repository: github.com/scottchronicity/ephemeris-mcp
category: web framework - ranked #41 of 48 actively-maintained web framework servers as of 2026-08-25.
registry: io.github.scottchronicity/ephemeris-mcp (active, first published 2026-03-27)
packages: pypi:ephemeris-mcp

06 · Ephemeris MCP FAQ

What is Ephemeris MCP?

Is Ephemeris MCP still maintained?

Yes - as of 2026-08-25, its last commit was 2026-03-27. We re-verify nightly.

How do I install Ephemeris MCP?

Run `uvx ephemeris-mcp`. You can also paste the ready-made client config above.

Does Ephemeris MCP run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Ephemeris MCP

Alternatives to Ephemeris MCP

Maintained web framework servers if Ephemeris MCP isn't the fit.

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