io.github.YawLabs/npmjs-mcp
npm Registry MCP Server
npm registry MCP server — package intelligence, security audits, dependency analysis
alive probed 2026-10-14
64tools
14ktokens in Claude Opus 5.5
14ktokens in Claude Code
6.8 %of a 200k context window
7.8ko200k_base estimate
162 msto initialize
19 msto list tools
- Run it
- npx -y @yawlabs/npmjs-mcp@0.17.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- @yawlabs/npmjs-mcp 0.17.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-14. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/YawLabs/npmjs-mcp
- Website
- https://yaw.sh/mcp-servers/npmjs-mcp/
- Registry
- active, updated 2026-10-09 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| npm_deprecate | 280 | 4 % |
| npm_unpublish_version | 246 | 3 % |
| npm_license_check | 237 | 3 % |
| npm_search | 234 | 3 % |
| npm_org_member_set | 231 | 3 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.YawLabs/npmjs-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.