io.github.rog0x/regex

mcp-regex-tools

Is the io.github.rog0x/regex MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-31.

Regex test, explain, replace patterns for AI agents

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

5tools

1.3ktokens in Claude Opus 5.5

0.6 %of Claude's 200k window

0.5×the median server

200 msto initialize

7 msto list tools

Run it: npx -y @rog0x/mcp-regex-tools@1.0.1 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: mcp-regex-tools 1.0.0
Capabilities: tools
Instructions: none
Of a 1M window: 0.1 % of a 1M context window
Count: 1.3k tokens in Claude Opus 5.5, exact, measured 2026-10-17. With the Claude Code prefix mcp__…__ on each tool name: 1.3k. The o200k_base estimate is 721. Counted again when the tool definitions change. Method.
Repository: https://github.com/rog0x/mcp-regex-tools
Registry: active, updated 2026-03-22 · registry entry

Most expensive tools

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

Tool	≈ Claude tokens	o200k estimate	Share of this server
text_transform	313	177	25 %
regex_replace	302	171	24 %
regex_extract	274	155	21 %
regex_test	221	125	17 %
regex_explain	164	93	13 %

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

Servers that mention regex.

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.