io.github.cyanheads/astronomy-mcp-server
astronomy-mcp-server
io.github.cyanheads/astronomy-mcp-server costs 4 740 tokens of context per session. It has 7 tool definitions. That is 2.4 % of a 200k window. Measured 2026-10-03.
Offline observational astronomy: positions, rise/set, moon phases, eclipses, and seasons.
alive probed 2026-10-03 · HTTP 200
7tools
4.7ktokens for the tool definitions
2.4 %of a 200k context window
1.6 sto initialize
230 msto list tools
- Endpoint
- https://astronomy.caseyjhand.com/mcp (streamable-http)
- Host
- astronomy.caseyjhand.com
- Protocol
- 2025-11-25
- Reports itself as
- astronomy-mcp-server 0.4.0
- Capabilities
- completions, logging, prompts, resources, tools
- Instructions
- 558 characters
- Repository
- https://github.com/cyanheads/astronomy-mcp-server
- Registry
- active, updated 2026-09-24 · registry entry
- Reachable
- 2 of the last 2 probes
Most expensive tools
| Tool | Tokens | Share of this server |
|---|---|---|
| astronomy_get_satellite_passes | 985 | 21 % |
| astronomy_get_ephemeris | 957 | 20 % |
| astronomy_find_events | 782 | 16 % |
| astronomy_get_sky_position | 650 | 14 % |
| astronomy_get_rise_set | 585 | 12 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Tokens |
|---|---|---|---|---|
| 2026-10-03 20:37 | alive | 1.6 s | 7 | 4.7k |
| 2026-10-03 17:53 | alive | 559 ms | 7 | 4.7k |
Badge
[](https://mcp-pulse.ulehla.dev/s/io.github.cyanheads/astronomy-mcp-server)