io.github.mrfentmen/javascript-pluserb-mcp
javascript-pluserb-mcp
Is the io.github.mrfentmen/javascript-pluserb-mcp MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-11.
JavaScript+ERB MCP: read, check, lint, scaffold and run code.
alive probed 2026-11-14 · unchanged since 2026-11-11
- Run it
- npx -y @mrfentmen/javascript-pluserb-mcp@1.0.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- javascript-pluserb-mcp 1.0.0
- Capabilities
- tools
- Instructions
- none
- Of a 1M window
- 0.4 % of a 1M context window
- Count
- 4.2k tokens in Claude Opus 5.5, exact, measured 2026-11-10. With the Claude Code prefix mcp__…__ on each tool name: 4.5k. 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 2026-11-10 · 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 | 272 | 146 | 7 % |
| format_source | 270 | 145 | 6 % |
| comment_lines | 257 | 138 | 6 % |
| insert_snippet | 255 | 137 | 6 % |
| uncomment_lines | 254 | 136 | 6 % |
Compare this server with others, or with the servers that share its tool set.
Same tool set as 9 other servers
These registry entries have the same tool names and the same schema sizes.
- io.github.mrfentmen/68000-assembly-mcp npmjs.com
- io.github.mrfentmen/brighterscript-mcp npmjs.com
- io.github.mrfentmen/coldfusion-cfc-mcp npmjs.com
- io.github.mrfentmen/ecere-projects-mcp npmjs.com
- io.github.mrfentmen/javascript-erb-mcp npmjs.com
- io.github.mrfentmen/propeller-spin-mcp npmjs.com
- io.github.mrfentmen/python-console-mcp npmjs.com
- io.github.mrfentmen/selinux-policy-mcp npmjs.com
- io.github.mrfentmen/witcher-script-mcp npmjs.com
More servers
Other registry entries on npmjs.com, the ones next to this name; all of them.
- io.github.mrfentmen/java-properties-mcp · alive
- io.github.mrfentmen/java-server-pages-mcp · alive
- io.github.mrfentmen/javascript-erb-mcp · alive
- io.github.mrfentmen/javascript-mcp · alive
- io.github.mrfentmen/jcl-mcp · alive
- io.github.mrfentmen/jd-edwards-mcp · alive
- io.github.mrfentmen/jellyfin-mcp · alive
- io.github.mrfentmen/jetbrains-mcp · alive
Servers that mention javascript.
- npm Release Tracker — new Node.js packages & JavaScript dependency updates (npmwatch) com.a2awire/data-npm-release-node-package-javascript-dependency · alive
- ByJG Open Source Docs com.byjg/docs · alive
- URLpipe dev.urlpipe/mcp · alive
- Code Sandbox API io.github.Br0ski777/code-sandbox · TLS error
- SmartFetch io.github.Friezaaaa/smartfetch · not found
- Ask262 io.github.bendtherules/ask262 · timeout
- Computer io.github.pollinations/computer · needs auth
- FineData io.github.quality-network/finedata-mcp · needs auth
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.