Looking for an alternative to Astronomy Oracle? Whether you need a different runtime environment, custom authentication support, or alternative API integrations in the Aerospace & Astrodynamics ecosystem, we have cataloged and compared the top alternative MCP servers below.
Catalog lookup and observing-session planning come from the gregario/astronomy-oracle MCP server, which uses bundled OpenNGC data and local calculations. It exposes tools for object lookup, catalog filtering, and location-based session planning, including coordinates, visibility, and rise/transit/set details. Use it when an agent needs structured deep-sky object data or an observing plan without a network dependency. It runs through npx and requires Node.js 18 or newer.
Direct comparison of key metrics, runtimes, authentication methods, and community popularity.
| Server Name | Runtime | Auth | Pricing | GitHub Stars | Downloads | Action |
|---|---|---|---|---|---|---|
| npx | No auth required | Free | 3 | 1 | Current | |
| bunx | No auth required | Free | 3 | — | Compare → | |
| npx | API key | Free | 1 | — | Compare → | |
| Remote (SSE) | Free/None | Free | — | — | Compare → | |
| Remote (SSE) | Free/None | Free | — | — | Compare → | |
| npx | Free/None | Free | 4 | — | Compare → | |
| npx | Free/None | Free | 1 | — | Compare → | |
| npx | Free/None | Free | — | — | Compare → | |
| npx | Free/None | Free | 4 | — | Compare → | |
| Remote (SSE) | Free/None | Free | — | — | Compare → | |
| Remote (SSE) | Free/None | Free | — | — | Compare → | |
| Remote (SSE) | Free/None | Free | — | — | Compare → | |
| Remote (SSE) | Free/None | Free | — | — | Compare → |