Astronomy MCP Server vs MCP Obsidian
A side-by-side look at the Astronomy MCP Server and MCP Obsidian MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Astronomy MCP Server for aerospace & astrodynamics work; choose MCP Obsidian for knowledge & memory as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Astronomy MCP Server when
- You need dedicated capabilities in the Aerospace & Astrodynamics domain.
- Its auth model fits you: No auth required.
- You want tools like
astronomy_get_sky_position, astronomy_get_rise_set, astronomy_get_moon_phase.
Choose MCP Obsidian when
- You need dedicated capabilities in the Knowledge & Memory domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: No auth required.
- You want tools like
read_note, write_note, patch_note.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Aerospace & Astrodynamics | Knowledge & Memory |
| Quality signal | 55/100 · Good | 73/100 · 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 | 3 | 1,703 |
| Directory activity | 6 views 0 installs 0 upvotes | 11 views 0 installs 0 upvotes |
| Tools | 7 | 18 |
| Full listing | View Astronomy MCP Server | View MCP Obsidian |
Tools & capabilities
Astronomy MCP Server tools 7
astronomy_get_sky_positionApparent position of one body or named star: RA/Dec, alt/az, ecliptic, magnitude, phase, Sun elongation, constellationastronomy_get_rise_setRise, set, and transit times for a body, plus civil, nautical, and astronomical twilight for the Sunastronomy_get_moon_phaseIlluminated fraction, phase name, synodic age, and the next four quarter phasesastronomy_find_eventsNext eclipses, equinoxes, solstices, moon quarters, oppositions, conjunctions, greatest elongations, or apsidesastronomy_list_visibleWhat's up now: naked-eye bodies (and optional bright stars) above the horizon, ranked, with a sky-condition gateastronomy_get_ephemerisSmall-body or spacecraft ephemeris from JPL Horizons (opt-in)astronomy_get_satellite_passesVisible satellite passes from a CelesTrak element set propagated with SGP4 (opt-in)
MCP Obsidian tools 18
read_noteRead a note from the Obsidian vaultwrite_noteWrite a note to the Obsidian vaultpatch_noteEfficiently update part of a note by replacing a specific string. This is more efficient than rewriting the entire note for small changes.list_directoryList files and directories in the vault (includes non-note filenames, while read/write tools remain note-only)delete_noteDelete a note from the Obsidian vault (requires confirmation). Supports permanent delete, vault trash, or system trash.search_notesSearch for notes in the vault by content or frontmattermove_noteMove or rename a note in the vaultmove_fileMove or rename any file in the vault (binary-safe, file-only, requires confirmation)read_multiple_notesRead multiple notes in a batch (max 10 files)update_frontmatterUpdate frontmatter of a note without changing contentget_notes_infoGet metadata for notes without reading full contentget_frontmatterExtract frontmatter from a note without reading the content- +6 more on the listing page
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.
Astronomy MCP Server
No confirmed install command for Astronomy MCP Server yet — follow the setup steps linked from its listing page rather than a guessed package name.
MCP Obsidian
{
"mcpServers": {
"bitbonsai-mcp-obsidian": {
"command": "npx",
"args": [
"-y",
"@bitbonsai/mcpvault@latest"
]
}
}
}
Frequently asked questions
Astronomy MCP Server is categorized under Aerospace & Astrodynamics and uses an install path we have not confirmed yet. MCP Obsidian belongs to Knowledge & Memory and uses a local stdio subprocess. Pick Astronomy MCP Server for aerospace & astrodynamics work and MCP Obsidian for knowledge & memory.
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. Astronomy MCP Server has no confirmed install command yet — follow its own setup instructions.
Astronomy MCP Server is listed as free. Auth: no auth required. MCP Obsidian 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 astronomy-mcp-server and bitbonsai-mcp-obsidian as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Astronomy MCP Server has a quality signal of 55/100 (Good) with 6 views, 0 installs and 3 GitHub stars. MCP Obsidian has 73/100 (Great) with 11 views, 0 installs and 1,703 GitHub stars.