io.github.YuanHuakk/JSReverser-MCP
JS Reverse MCP
MCP server for JavaScript reverse engineering and browser debugging.
alive probed 2026-10-15
96tools
25ktokens in Claude Opus 5.5
27ktokens in Claude Code
12.7 %of a 200k context window
14ko200k_base estimate
2.4 sto initialize
100 msto list tools
- Run it
- npx -y @yuanhuakk/js-reverse-mcp@3.0.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- js_reverse_mcp 3.0.0
- Capabilities
- logging, tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/YuanHuakk/JSReverser-MCP
- Registry
- active, updated 2026-06-24 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| analyze_target | 472 | 3 % |
| collect_code | 437 | 3 % |
| crypto_verify | 385 | 3 % |
| auto_patch_env | 362 | 3 % |
| instrument_jsvmp | 340 | 2 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.YuanHuakk/JSReverser-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.