io.github.icyn12-tinker/icyn-date

Icyn Date

Is the Icyn Date MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-31.

Date context for agents: Chinese lunar calendar, solar terms, holidays for 12 regions. Offline.

alive probed 2026-11-14 · unchanged since 2026-10-31

11tools

3.0ktokens in Claude Opus 5.5

1.5 %of Claude's 200k window

1.2×the median server

376 msto initialize

14 msto list tools

Run it: npx -y @icyn/date-mcp@0.1.5 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: icyn-date 0.1.0
Capabilities: tools
Instructions: 1 794 characters
Of a 1M window: 0.3 % of a 1M context window
Count: 3.0k tokens in Claude Opus 5.5, exact, measured 2026-10-17. With the Claude Code prefix mcp__…__ on each tool name: 3.1k. The o200k_base estimate is 1.7k. Counted again when the tool definitions change. Method.
Repository: https://github.com/icyn12-tinker/icyndate
Website: https://github.com/icyn12-tinker/icyndate
Registry: active, updated 2026-09-21 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.76×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
regions_observing	494	281	17 %
workdays	341	194	11 %
date_context	317	180	11 %
lunar	303	172	10 %
next_long_weekend	287	163	10 %

Other registry entries on npmjs.com, the ones next to this name; all of them.

Servers that mention date.

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.