io.github.trebeljahr/hydroxyl
Hydroxyl
Local stdio MCP server: publication figures, structure checks and conversions for AI assistants
alive probed 2026-10-14
5tools
2.0ktokens in Claude Opus 5.5
2.1ktokens in Claude Code
1.0 %of a 200k context window
1.2ko200k_base estimate
463 msto initialize
15 msto list tools
- Run it
- npx -y hydroxyl-mcp@0.1.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- hydroxyl 0.1.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-14. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/trebeljahr/hydroxyl.app
- Website
- https://hydroxyl.app
- Registry
- active, updated 2026-10-08 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| render_figure | 463 | 38 % |
| convert | 202 | 16 % |
| check_structure | 196 | 16 % |
| describe | 186 | 15 % |
| editor_link | 178 | 15 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.trebeljahr/hydroxyl)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.