space.unhandled/isatty
isatty
Is the isatty MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-15.
Reverse CAPTCHA: prove a language model is on the other end and get a signed attestation.
alive probed 2026-11-15 · HTTP 200
- Endpoint
- https://isatty.unhandled.space/mcp (streamable-http)
- Host
- isatty.unhandled.space
- Protocol
- 2025-06-18
- Reports itself as
- isatty 0.1.0
- Capabilities
- tools
- Instructions
- 680 characters
- Of a 1M window
- <0.1 % of a 1M context window
- Count
- 615 tokens in Claude Opus 5.5, exact, measured 2026-11-15. With the Claude Code prefix mcp__…__ on each tool name: 639. The o200k_base estimate is 377. Counted again when the tool definitions change. Method.
- Website
- https://isatty.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 | 347 | 213 | 56 % |
| check | 165 | 101 | 27 % |
| get_entry_challenge | 103 | 63 | 17 % |
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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.