io.github.mrfentmen/raku-mcp

raku-mcp

Is the io.github.mrfentmen/raku-mcp MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-09.

Raku MCP: 20 real tools to read, check, lint, scaffold, build and run Raku code.

alive probed 2026-11-15 · unchanged since 2026-11-09

20tools

4.1ktokens in Claude Opus 5.5

2.0 %of Claude's 200k window

1.6×the median server

306 msto initialize

17 msto list tools

Run it: npx -y @mrfentmen/raku-mcp@1.0.0 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: raku-mcp 1.0.0
Capabilities: tools
Instructions: none
Of a 1M window: 0.4 % of a 1M context window
Count: 4.1k tokens in Claude Opus 5.5, exact, measured 2026-11-09. With the Claude Code prefix mcp__…__ on each tool name: 4.3k. The o200k_base estimate is 2.2k. Counted again when the tool definitions change. Method.
Repository: https://github.com/mrfentmen/awesome-servers
Registry: active, updated 2026-11-08 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.86×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
rename_symbol	266	143	7 %
format_source	264	142	7 %
comment_lines	251	135	6 %
insert_snippet	249	134	6 %
uncomment_lines	247	133	6 %

These registry entries have the same tool names and the same schema sizes.

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

Servers that mention raku.

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.