Astronomy Oracle

Install Astronomy Oracle

npx astronomy-oracle

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

Use Astronomy Oracle with Claude Code

Once the server is on your machine, register it with Claude Code so the agent can call it like any other tool. The general pattern is:

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

After it's registered, run claude and ask anything that requires Astronomy Oracle. Claude Code will negotiate the MCP handshake and surface the server's tools, prompts, and resources to the model automatically. See our Claude Code MCP guide for environment variables, scope flags, and credential handling.

What this server is for

Astronomy Oracle sits in the aerospace & astrodynamics category. It's community-maintained — check the repo's last-commit date and open issues before depending on it in production. The full description from the source list:

Accurate astronomical catalog data and observing session planner. 13,000+ deep-sky objects from OpenNGC with deterministic visibility, rise/transit/set, and alt/az calculations. `npx astronomy-oracle`

FAQ

Is Astronomy Oracle free?

Yes — every MCP server in the ClawHire directory is open-source or freely available. Some servers proxy to paid APIs (you supply your own keys), but the server itself is free.

Does it work with Claude Desktop / Cursor / Windsurf?

If a client speaks the Model Context Protocol, it can use this server. The transport (stdio vs SSE vs HTTP) needs to match what the client supports, but the server itself is client-agnostic.

How do I report a bug or contribute?

Open an issue or PR on the GitHub repository.