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Compare scores, permissions, risks, and fit in one decision-focused table.

DimensionMDN MCP ServerMDN's official experimental MCP server for web search, docs, and browser compatibility dataNPM Sentinel MCP ServerAI-powered NPM package analysis MCP server
FMRS53 / 100 · D79 / 100 · B
Reliability8 / 2012 / 20
Security and permissions12 / 2016 / 20
Maintenance10 / 2018 / 20
Documentation11 / 2018 / 20
Setup experience12 / 2015 / 20
Best for
  • Web developers who need accurate, current web platform documentation
  • Coding agents aiming to reduce inaccuracies caused by outdated LLM training data
  • Developers auditing NPM dependencies within AI workflows
  • Teams performing supply chain security assessments
  • Users of Claude Desktop, Cursor, or VS Code
Not for
  • Users who require strict data-privacy guarantees and want no query logging whatsoever
  • Production workflows requiring a stable, guaranteed-uptime API, since this server is experimental and may be withdrawn at any time
  • Projects outside the NPM ecosystem (e.g., pure Python/Go)
  • Environments without network access to deps.dev, OSV.dev, and the npm registry
  • Scenarios requiring maintenance by an official upstream vendor
Required permissions
  • The server itself does not require access to local files or a codebase
  • Using the remote server sends query content to Mozilla's servers
  • Network access to the NPM registry and external services (deps.dev, OSV.dev, OpenSSF, npms.io, GitHub)
  • Read access to workspace lockfiles (pnpm-lock.yaml, package-lock., yarn.lock) for cache invalidation
Risks and side effects
  • The README states that query data is stored for analytics; it is not linked to identifying user information, but private details a user shares with the LLM could inadvertently be included in logged queries
  • As an experimental project, the server may be withdrawn at any time, making it unsuitable for dependencies requiring long-term stability
  • Use of the remote server requires compliance with Mozilla's Acceptable Use Policy
  • Third-party READMEs and changelogs are untrusted external content; they are wrapped in tags with _meta flags but should still be handled cautiously
  • Depends on availability and accuracy of external services
  • Batch requests are capped at 25 packages to prevent registry enumeration; larger sets require batching
  • Third-party open source project, not officially maintained by NPM or Anthropic
Supported clientsClaude CodeClaude Desktop, VS Code, Cursor
Tools019