io.github.shaozhengkun123/yarrow
yarrow
I-Ching (周易) oracle: cast a hexagram, read classical commentary, get a reflection. Bilingual.
alive probed 2026-10-05 · HTTP 200
7tools
2.4ktokens in Claude Opus 5.5
2.5ktokens in Claude Code
1.2 %of a 200k context window
1.3ko200k_base estimate
163 msto initialize
143 msto list tools
- Endpoint
- https://yarrow-oracle.shaozhengkun.workers.dev/mcp (streamable-http)
- Host
- yarrow-oracle.shaozhengkun.workers.dev
- Protocol
- 2025-03-26
- Reports itself as
- yarrow 0.1.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/shaozhengkun123/yarrow
- Registry
- active, updated 2026-05-26 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| divine | 270 | 20 % |
| two_lenses | 255 | 19 % |
| cast_hexagram | 210 | 16 % |
| tarot_reading | 206 | 15 % |
| lookup_hexagram | 168 | 13 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-05 16:28 | alive | 163 ms | 7 | 2.4k | 1.3k |
| 2026-10-05 00:55 | alive | 145 ms | 7 | 1.3k | |
| 2026-10-04 10:07 | alive | 1.1 s | 7 | 1.3k | |
| 2026-10-04 08:00 | alive | 606 ms | 7 | 1.3k | |
| 2026-10-03 20:40 | alive | 272 ms | 7 | 1.3k | |
| 2026-10-03 17:55 | alive | 655 ms | 7 | 1.3k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.shaozhengkun123/yarrow)
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.