io.github.xucheng2024/natalchartlab
Natal Chart Lab
Is the Natal Chart Lab MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-14.
Astrology sky data: planet signs, birth placements, retrogrades, Moon phases. No API key.
alive probed 2026-11-15 · unchanged since 2026-11-14
- Run it
- npx -y natalchartlab-mcp@1.0.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- natalchartlab 1.0.0
- Capabilities
- tools
- Instructions
- none
- Of a 1M window
- 0.1 % of a 1M context window
- Count
- 1.2k tokens in Claude Opus 5.5, exact, measured 2026-11-14. With the Claude Code prefix mcp__…__ on each tool name: 1.3k. The o200k_base estimate is 727. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/xucheng2024/natalchartlab-mcp
- Website
- https://natalchartlab.com/astrology-api
- Registry
- active, updated 2026-11-14 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.71×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| get_birth_placements | 320 | 187 | 26 % |
| get_retrogrades | 291 | 170 | 23 % |
| get_moon_phases | 275 | 161 | 22 % |
| get_planet_positions | 229 | 134 | 18 % |
| get_current_sky | 128 | 75 | 10 % |
Compare this server with others.
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Other registry entries on npmjs.com, the ones next to this name; all of them.
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- io.github.xultrax-web/agent-memory-mcp · needs env
- shibbo io.github.xvr2e7/shibbo · alive
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- ocular io.github.xyun1996/ocular · alive
Servers that mention chart or natal.
- ai.jeda/jeda-ai · alive
- MarketCrew — live market data & stock analysis ai.marketcrew/market-data · alive
- MemeStack ai.memestack/mcp · alive
- NatalChart.AI Astrology ai.natalchart/astrology · alive
- App Store Trends API ai.trendsapi/app-store · alive
- App Store Trends MCP ai.trendsmcp/app-store · alive
- VideoZero ai.videozero.engine/mcp · needs auth
- Villiers Charter ai.villiers/charter · alive
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.