Astronomy Oracle MCP Server

Accurate astronomical catalog data and observing session planner for LLM assistants. Stops hallucinated magnitudes, coordinates, and visibility. Its 3 documented tools cluster into read & search, plan. 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 TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-08-01 · ★ 3 · #26 OF 48 MAINTAINED WEB FRAMEWORK · VERIFIED 2026-08-25

MIT · TypeScript servers · how we verify → /methodology

01 · Install Astronomy Oracle

Claude Code

claude mcp add gregario-astronomy-oracle -- npx -y astronomy-oracle

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "gregario-astronomy-oracle": {
      "command": "npx",
      "args": [
        "-y",
        "astronomy-oracle"
      ]
    }
  }
}

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 MIT - declared in the repository

npm package astronomy-oracle - unscoped; check the name against the project README before installing

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

03 · What Astronomy Oracle can do

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

The 3 tools it gives your agent

Extracted from the project's README - what astronomy-oracle lets an agent do.

lookup_object: - Look up a celestial object by Messier number, NGC/IC designation, or common name. Optionally compute visibility from a given location and time.
search_objects: - Search and filter the catalog by type, constellation, magnitude range, angular size, or catalog membership.
plan_session: - Generate an observing session plan for a given location and date. Returns the best objects to observe grouped by time window.

Latest releases

v0.1.0 · 2026-03-16

Astronomy Oracle v0.1.0 · Accurate astronomical catalog data and observing session planner MCP server. · Tools · lookup_object - Look up any deep-sky object by Messier number, NGC/IC designation, or common name.…

04 · Who maintains Astronomy Oracle

astronomy-oracle is maintained by gregario. We track 12 MCP servers from gregario - 12 actively maintained, 41 combined GitHub stars, oldest repo from Mar 2026. Full record: all servers from gregario.

05 · Facts

repository: github.com/gregario/astronomy-oracle
category: web framework - ranked #26 of 48 actively-maintained web framework servers as of 2026-08-25.
registry: io.github.gregario/astronomy-oracle (active, first published 2026-03-16)
packages: npm:astronomy-oracle

06 · Astronomy Oracle FAQ

Is Astronomy Oracle still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-01. We re-verify nightly.

What can Astronomy Oracle do?

Its README documents 3 tools, including lookup_object, search_objects, plan_session.

How do I install Astronomy Oracle?

Run `npx -y astronomy-oracle`. You can also paste the ready-made client config above.

Does Astronomy Oracle run locally?

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

07 · Alternatives to Astronomy Oracle

Alternatives to Astronomy Oracle

Maintained web framework servers if Astronomy Oracle isn't the fit.

More web framework MCP servers · Nodebench · Ignite UI MCP Server · Stellaroid Earn · A11y Check · Deepmiro

More TypeScript MCP servers · Brewers Almanack · Dnd Oracle · Godot Forge · Lego Oracle · Lorcana Oracle · see all