io.github.mrfentmen/number-tools-mcp

number-tools-mcp

Is the io.github.mrfentmen/number-tools-mcp MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-27.

Convert numbers between bases, make roman numerals, and spell out numbers locally. No network...

alive probed 2026-11-15 · unchanged since 2026-10-27

3tools

410tokens in Claude Opus 5.5

0.2 %of Claude's 200k window

0.2×the median server

355 msto initialize

11 msto list tools

Run it: npx -y number-tools-mcp@1.0.0 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: number-tools-mcp 1.0.0
Capabilities: tools
Instructions: none
Of a 1M window: <0.1 % of a 1M context window
Count: 410 tokens in Claude Opus 5.5, exact, measured 2026-10-27. With the Claude Code prefix mcp__…__ on each tool name: 449. The o200k_base estimate is 231. Counted again when the tool definitions change. Method.
Repository: https://github.com/mrfentmen/number-tools-mcp
Registry: active, updated 2026-09-21 · registry entry
Changes: 2 recorded, reachable in 2 of them. A row is added when the result, the tool count or the cost changes.

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.77×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
convert_base	172	97	42 %
roman	119	67	29 %
spell_number	119	67	29 %

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

Servers that mention number.

We add a row when the result changes. A server with no change keeps its last row.

Probed	Result	Init	Tools	Claude	o200k
2026-10-27 06:58	alive	182 ms	3	410	231
2026-10-20 06:44	alive	355 ms	3		231

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.