com.tilwhen/tilwhen
tilwhen date engine
Deterministic date arithmetic with auditable receipts: business days, due dates, holidays.
alive probed 2026-10-05 · HTTP 200
9tools
4.9ktokens in Claude Opus 5.5
5.0ktokens in Claude Code
2.4 %of a 200k context window
2.8ko200k_base estimate
341 msto initialize
374 msto list tools
- Endpoint
- https://mcp.tilwhen.com/mcp (streamable-http)
- Host
- mcp.tilwhen.com
- Protocol
- 2025-11-25
- Reports itself as
- tilwhen 1.0.0
- Capabilities
- resources, tools
- Instructions
- 1 596 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Website
- https://tilwhen.com/mcp
- Registry
- active, updated 2026-09-18 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| explain | 680 | 24 % |
| business_days | 476 | 17 % |
| invoice_due | 360 | 13 % |
| days_between | 259 | 9 % |
| next_occurrence | 232 | 8 % |
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 13:47 | alive | 341 ms | 9 | 4.9k | 2.8k |
| 2026-10-05 00:22 | alive | 276 ms | 9 | 2.8k | |
| 2026-10-04 09:59 | alive | 655 ms | 9 | 2.8k | |
| 2026-10-04 07:52 | alive | 840 ms | 9 | 2.8k | |
| 2026-10-03 20:32 | alive | 465 ms | 9 | 2.8k | |
| 2026-10-03 17:50 | alive | 321 ms | 9 | 2.8k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/com.tilwhen/tilwhen)
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.