Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add ofershap/mcp-server-npm-plus --skill npm-researchgit clone --depth 1 https://github.com/ofershap/mcp-server-npm-plusWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/ofershap/mcp-server-npm-plus/npm-research)<a href="https://agentmods.dev/skills/ofershap/mcp-server-npm-plus/npm-research"><img src="https://agentmods.dev/badge/skills/ofershap/mcp-server-npm-plus/npm-research/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/ofershap/mcp-server-npm-plus/npm-research"><img src="https://agentmods.dev/badge/skills/ofershap/mcp-server-npm-plus/npm-research.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00027 | $0.00380 |
| Opus 5 | $0.00014 | $0.00190 |
| Sonnet 5 | $0.00005 | $0.00076 |
| Haiku 4.5 | $0.00003 | $0.00038 |
Grade A, and why
npm-research scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
npm Package Research via MCP
Use this skill for in-depth npm package research: bundle sizes, vulnerability scanning, download comparisons, and dependency trees. No API keys needed.
Available Tools
| Tool | What it does |
|---|---|
search |
Search npm packages by query |
package_info |
Detailed info: description, license, repo, dependencies |
downloads |
Download stats for a package |
compare_downloads |
Compare download counts across multiple packages |
bundle_size |
Bundle size (minified + gzip) via Bundlephobia |
vulnerabilities |
Known vulnerability info and advisory links |
dependency_tree |
Show direct dependencies as a tree |
download_trends |
Daily breakdown with sparkline visualization |
Workflow
- For "which library?" questions:
compare_downloads+bundle_sizefor each candidate - For security audits:
vulnerabilitieson each dependency - For adoption analysis:
download_trendsto see growth patterns - For dependency footprint:
dependency_treebefore adding a new package
Key Patterns
bundle_sizecalls Bundlephobia — some packages may not be analyzable (native modules, very large packages)compare_downloadsaccepts multiple package names — ideal for "zustand vs jotai vs valtio" comparisonsvulnerabilitieschecks npm audit advisories — always run this before recommending a packagedownload_trendsincludes a text sparkline for quick visual trend assessment
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 36 lines · 27 tokens per session scan A 1e44c53209ab
npm-research is a skill published in the GitHub repository ofershap/mcp-server-npm-plus (1 stars, last pushed 6mo ago), licensed MIT. It adds 27 tokens to every session and 380 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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