io.github.zerostel/zerostel
Zerostel
Checkpoints, timeline and rewind for AI coding agents. Local, no telemetry.
alive probed 2026-10-15
7tools
1.1ktokens in Claude Opus 5.5
1.2ktokens in Claude Code
0.6 %of a 200k context window
706o200k_base estimate
151 msto initialize
4 msto list tools
- Run it
- npx -y zerostel@0.3.2 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- zerostel 0.3.2
- Capabilities
- tools
- Instructions
- 171 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/zerostel/zerostel
- Website
- https://zerostel.com
- 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 |
|---|---|---|
| rewind | 220 | 31 % |
| verify | 119 | 17 % |
| handoff | 115 | 16 % |
| checks | 77 | 11 % |
| checkpoint | 59 | 8 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.zerostel/zerostel)
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.