Groundline vs Astronomy Oracle
A side-by-side look at the Groundline and Astronomy Oracle MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
G
GroundlineAerospace & AstrodynamicsVerifiable test-data analysis: deterministic tools, evidence ledger, number-level checks.36FairAuth: no auth requiredVerdict: choose Groundline for aerospace & astrodynamics work; choose Astronomy Oracle for aerospace & astrodynamics as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
GChoose Groundline when
- You need dedicated capabilities in the Aerospace & Astrodynamics domain.
- Its auth model fits you: No auth required.
Choose Astronomy Oracle when
- You need dedicated capabilities in the Aerospace & Astrodynamics domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: No auth required.
- You want tools like
lookup_object, search_objects, plan_session.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | G Groundline | |
|---|---|---|
| Category | Aerospace & Astrodynamics | Aerospace & Astrodynamics |
| Quality signal | 36/100 · Fair | 65/100 · Great |
| Install command | Not confirmed yet | Confirmed |
| Transport | — | Local subprocess (stdio) |
| Auth | No auth required | No auth required |
| Pricing | Free | Free |
| Required env vars | None listed | None listed |
| Verified owner | Community listing | Community listing |
| GitHub stars | 0 | 3 |
| Directory activity | 0 views 0 installs 0 upvotes | 7 views 1 installs 0 upvotes |
| Tools | Not listed | 3 |
| Full listing | View Groundline | View Astronomy Oracle |
Tools & capabilities
Groundline tools
No tool names declared yet. Check the project README from the listing page.
Astronomy Oracle tools 3
lookup_objectLook up a celestial object by Messier number (e.g. M31), NGC/IC designation (e.g. NGC7000), or common name (e.g. Andromeda Galaxy). Optionally compute visibility from a given location and time.search_objectsSearch and filter the celestial object catalog by type, constellation, magnitude, angular size, or catalog membership. Returns a formatted table of matching objects sorted by brightness.plan_sessionGenerate an observing session plan for a given location and date. Returns the best celestial objects to observe grouped by time window (evening, midnight, pre-dawn), scored by observability.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Groundline
No confirmed install command for Groundline yet — follow the setup steps linked from its listing page rather than a guessed package name.
Astronomy Oracle
{
"mcpServers": {
"gregario-astronomy-oracle": {
"command": "npx",
"args": [
"-y",
"astronomy-oracle"
]
}
}
}
Frequently asked questions
Groundline is categorized under Aerospace & Astrodynamics and uses an install path we have not confirmed yet. Astronomy Oracle belongs to Aerospace & Astrodynamics and uses a local stdio subprocess. Pick Groundline for aerospace & astrodynamics work and Astronomy Oracle for aerospace & astrodynamics.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client. Groundline has no confirmed install command yet — follow its own setup instructions.
Groundline is listed as free. Auth: no auth required. Astronomy Oracle is listed as free. Auth: no auth required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add groundline and gregario-astronomy-oracle as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Groundline has a quality signal of 36/100 (Fair) with 0 views, 0 installs and 0 GitHub stars. Astronomy Oracle has 65/100 (Great) with 7 views, 1 installs and 3 GitHub stars.