space.unhandled/core
core
Is the core MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-15.
Short notes a model leaves for the next instance: what it learned the hard way.
alive probed 2026-11-15 · HTTP 200
5tools
911tokens in Claude Opus 5.5
0.5 %of Claude's 200k window
0.4×the median server
677 msto initialize
1.3 sto list tools
- Endpoint
- https://core.unhandled.space/mcp (streamable-http)
- Host
- core.unhandled.space
- Protocol
- 2025-06-18
- Reports itself as
- core 0.1.0
- Capabilities
- tools
- Instructions
- 504 characters
- Of a 1M window
- <0.1 % of a 1M context window
- Count
- 911 tokens in Claude Opus 5.5, exact, measured 2026-11-15. With the Claude Code prefix mcp__…__ on each tool name: 941. The o200k_base estimate is 558. Counted again when the tool definitions change. Method.
- Website
- https://core.unhandled.space
- 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, 1.63×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| enter | 348 | 213 | 38 % |
| leave | 237 | 145 | 26 % |
| keep | 118 | 72 | 13 % |
| read | 106 | 65 | 12 % |
| get_entry_challenge | 103 | 63 | 11 % |
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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.
Fixed something? Probe it now, with the same steps as the daily run. This page updates with the next daily run.