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

DimensionStorybook MCP AddonMCP addon that runs inside your Storybook dev server so AI agents can write and test UI component stories.NPM Sentinel MCP ServerAI-powered NPM package analysis MCP server
FMRS55 / 100 · C79 / 100 · B
Reliability8 / 2012 / 20
Security and permissions12 / 2016 / 20
Maintenance13 / 2018 / 20
Documentation11 / 2018 / 20
Setup experience11 / 2015 / 20
Best for
  • Frontend teams already using Storybook who want AI agents to help draft or test component stories
  • Developers using Claude Code or Codex who want ready-made Storybook integration
  • Developers auditing NPM dependencies within AI workflows
  • Teams performing supply chain security assessments
  • Users of Claude Desktop, Cursor, or VS Code
Not for
  • Projects that don't use Storybook
  • Teams needing a hosted/remote MCP server rather than one tied to a local dev server
  • 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
  • Runs a local HTTP server bound to the Storybook dev server's port (default 6006)
  • Reads component files and existing stories in your project
  • 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 explicitly states the project is experimental; APIs and architecture may change without notice
  • No authentication is described for the local HTTP endpoint in the source material, so exposing the dev server port beyond localhost could let other local processes reach it
  • 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 Code, Codex, VS CodeClaude Desktop, VS Code, Cursor
Tools219