io.github.ryudi84/regex-lab-mcp
regex-lab
Test, explain, and generate regular expressions
alive probed 2026-10-15
3tools
539tokens in Claude Opus 5.5
581tokens in Claude Code
0.3 %of a 200k context window
285o200k_base estimate
375 msto initialize
10 msto list tools
- Run it
- npx -y regex-lab-mcp@1.0.2 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- regex-lab 1.0.0
- Capabilities
- tools
- Instructions
- 66 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/ryudi84/sovereign-mcp-servers
- Registry
- active, updated 2026-02-25 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| replace_regex | 115 | 40 % |
| test_regex | 109 | 38 % |
| validate_regex | 61 | 21 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.ryudi84/regex-lab-mcp)
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.