updated 2026-10-16 16:07 UTC

Storybook MCP Addon

Repository Website

🤖

MCP Servers TypeScript Needs review MIT

Is Storybook MCP Addon safe? Promising trust profile, but some evidence still deserves review.

OSSF Scorecard 4.0 / 10
Provenance Attested
Signed commits 37%
Last push 39d ago
Advisories None known
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In detail: Storybook MCP Addon scores 69.7/100 (Grade B), ranked #357 of 1378 tracked open-source AI agent projects, on evidence coverage B (3 of 5 independent signal types). The public evidence: its packages ship with cryptographic provenance; OSSF Scorecard rates its supply-chain practices 4.0/10; 37% of recent commits are signed; no published advisory affects its latest release (@storybook/addon-mcp); last pushed 2026-09-07. Every point is earned from checkable signals — never paid placement. How scoring works →

How Storybook MCP Addon could raise its score

Each line changes one public signal and recomputes with the live scoring function. The gains don't add up exactly, because the score is capped near the top.

Already done? Suggest a correctionAdd the trust badge
Active listing, but review is needed
  • [5.1] repository is archived

Chain of custody

Scanners check what the code says. This traces who ships Storybook MCP Addon and whether that has changed: from the source repository, through how changes are reviewed and released, to the package you install. These are the checks for OWASP ASI04 Agentic Supply Chain Vulnerabilities.

  1. Source Partly signed

    github.com/storybookjs/mcp, MIT, last pushed 2026-09-07. 37% of the last 100 commits carry a verified signature; the rest can't be tied to a verified identity.

  2. Review and release Mixed

    OpenSSF Scorecard rates the repository's practices 4.0/10 (scanned Oct 9, 2026). The checks that decide who can get a change released:

    • Code Review5
    • Branch Protection4
    • Signed Releasesn/a
    • Dangerous Workflow10
    • Token Permissions0
    • Pinned Dependencies10
    All 18 Scorecard checks
    Binary-Artifacts 10
    Branch-Protection 4
    CI-Tests 10
    CII-Best-Practices 0
    Code-Review 5
    Contributors 10
    Dangerous-Workflow 10
    Dependency-Update-Tool 0
    Fuzzing 0
    License 10
    Maintained 0
    Packaging -1
    Pinned-Dependencies 10
    SAST 0
    Security-Policy 0
    Signed-Releases -1
    Token-Permissions 0
    Vulnerabilities 0

  3. Published packages Partly attested

    • npm @storybook/addon-mcp Source link points to storybookjs/storybook, same owner Build provenance attested

  4. What you install today No known advisories

    Latest release checked: @storybook/addon-mcp 10.6.2. No published advisory affects it (OSV, checked 2026-10-16).

Changes to this chain

  • 2026-09-23 Package provenance attestation detected
  • 2026-08-30 OSSF Scorecard: 4.8/10

Evidence behind this score

Coverage B: 3 of 5 independent evidence types found.

  • GitHub repository data
  • Package downloads
  • Supply-chain checks
  • Public actions (missing)
  • Community mentions (missing)

Verify this score yourself

Every build re-issues Storybook MCP Addon’s score as an Ed25519-signed credential, valid for 7 days. You can check it offline against HVTracker’s published key; if anyone changes a number after signing, verification fails.

Signed credential (JSON) How to verify

What this score doesn’t check

It covers who ships the code, not what the code does. It doesn’t read tool descriptions or prompts for injected instructions, watch runtime behaviour, or find bugs nobody has disclosed yet. For that, run a content scanner before you connect it, such as Cisco MCP Scanner or Snyk Agent Scan.

How Storybook MCP Addon compares in MCP Servers

  1. #210 Fred MCP Server 69.8 +0.1
  2. #211 YADE MCP Server 69.8 +0.1
  3. #212 Storybook MCP Addon 69.7 this agent
  4. #213 Qiskit Code Assistant MCP Server 69.6 −0.1
  5. #214 Federal Compass MCP 69.6 −0.1

Bars show each HVTrust score; the tick marks Storybook MCP Addon’s 69.7.

Where the 69.7 comes from

HVTrust dimensions vs the MCP Servers average

69.7 / 100 · 100.0% confidence

Storybook MCP Addon MCP Servers average (781 agents)

Safety / Integrity50% OSSF Scorecard · 30% provenance · 20% signed commits
14.3 / 25
3.8 above avg 10.5
Identity / Provenance60% listing status · 40% build provenance
18.0 / 18
4.5 above avg 13.5
Transparency50% declared license · 50% OSSF Scorecard
11.9 / 17
in line with avg 12.3
Maintenance60% last-push freshness · 40% commit activity
9.4 / 20
2.9 below avg 12.3
AdoptionLog-scaled stars · package downloads
14.4 / 20
7.0 above avg 7.4

Quick Trust Read

What Would Improve It
Increase the share of verified signed commits for clearer maintainer identity.
Recent Changes
2026-10-14
Warning Issued
Warning: eligibility issues detected
2026-10-12
Warning Cleared
Warning cleared: eligibility issues resolved
2026-10-09
Rank Moved
Rank dropped 10 spots (#334 → #344)
Maintainer Checklist
Raise Scorecard signals Current OSSF Scorecard is 4.0/10. Tighten the weakest checks to improve public safety evidence.
Increase signed commits Raise the share of verified-signed commits to make maintainer identity and release history easier to trust.
Refresh maintenance signals The repo was last pushed 39 days ago. Fresh activity helps separate stable projects from stale ones.
Review Flags
[5.1] repository is archived
Compare with another agent Get email alerts for Storybook MCP Addon View MCP Servers Report missing data
41.8
Activity sub-score · out of 100
#212
In MCP Servers

How to read this: HVTrust (0–100) weighs supply-chain signals (provenance, OSSF Scorecard, signed commits, open license) alongside real-world adoption. Grade B reflects the trust score band: A ≥ 80, B ≥ 65, C ≥ 50, D < 50. Evidence coverage B is separate — it grades how many independent signal types back the score (3 of 5), so a high score on thin evidence stays visible. Full methodology →

Signals refreshed 2026-10-16 16:07 UTC · Repo last pushed 39 days ago

Rank Trend

2026-09-29 2026-10-16

Activity & Reach

Stars
271
Forks
43
Last Push
2026-09-07
39 days ago
Commits (4 wk)
0
Downloads (7d)
2,528,261
npm
HN mentions (30d)
—
Open Issues
29
Rank Change
=
was #357

Analysis

Activity Inputs

41.8 / 100
StarsRepository reach
14.6 / 30
FreshnessLast push recency
19.6 / 25
ActivityRecent commits
0.0 / 25
CommunityFork signal
7.6 / 20

Common questions about Storybook MCP Addon

Storybook MCP Addon has a mixed signal profile. Some trust indicators are present, others are missing. Whether it is safe for your use case depends on which gaps matter to you — review the breakdown below before adopting in production.
Does Storybook MCP Addon publish package provenance?
Yes. Storybook MCP Addon's package releases carry build provenance attestations, which cryptographically link the published package back to its source repository and CI workflow.
Does Storybook MCP Addon have an OpenSSF Scorecard?
Storybook MCP Addon has an OpenSSF Scorecard score of 4.0/10. The Scorecard checks for branch protection, signed releases, dependency updates, fuzzing, code review, and other supply-chain hygiene items. See the full check breakdown on this page.
Is Storybook MCP Addon actively maintained?
Slowing down. Last push was 39 days ago — keep an eye on whether activity resumes.
What license does Storybook MCP Addon use?
Storybook MCP Addon ships under MIT. A declared, OSI-approved license is one of the transparency signals HVTrust scores.
Are Storybook MCP Addon's commits signed?
37% of the last 100 commits to Storybook MCP Addon are verified-signed (GPG, SSH, S/MIME, or GitHub's signing flow). Signed commits help confirm that code was authored by who the commit claims.

Not a safety endorsement. HVTracker describes what public signals show, not whether a project is safe for your use case. Run your own security review before adopting in production.

AI agent surface

MCP, providers, tool surface
Scored in HVTrust

These runtime-trust fields — detected from public repo docs and manifests — contribute a bounded adjustment to this project's HVTrust score alongside supply-chain evidence. The exact values each field can add or subtract are documented in the methodology → Compare this surface across every listed agent in the capability matrix →

MCP Server Support
high confidence
Implemented
Storybook MCP Addon appears to expose MCP server capabilities.
Detailed evidence is not shown in the public view.
External Service Dependencies
medium confidence
1 detected
Public provider/service dependencies detected.
Credential signal: No explicit API-key/config marker detected.
Tool / Plugin Surface
high confidence
Declared
Declared plugin/integration surface detected.
Detailed evidence is not shown in the public view.
Package Provenance Drift
low confidence
Unknown
Package source metadata is missing or inconclusive
Detailed evidence is not shown in the public view.
  • MCP signal live
  • External deps live
  • Tool / plugin surface live
  • Package provenance drift live
How this surface has changed

Detected changes to Storybook MCP Addon's runtime surface and supply-chain posture, from daily public-signal snapshots. A change here means our detectors see something different — a genuinely changed capability, or better evidence of an existing one.

2026-09-24
Tool Surface Changed
Detected tool/plugin surface changed: none → declared
2026-09-24
Provider Added
Runtime surface grew — new detected provider dependency: Anthropic
2026-09-24
Mcp Status Changed
Detected MCP server support changed: none → implemented
2026-09-23
Provenance Added
Package provenance attestation detected

Maintain Storybook MCP Addon?

For maintainers

HVTrust scores Storybook MCP Addon from public signals only — we never contact maintainers first. If a signal is wrong, stale, or missing (provenance you publish, a Scorecard you run, signed releases), tell us and we'll review it. Corrections are public and tracked on GitHub.

Submit a correction → Add the trust badge

Reputation Timeline

Signal history
Rank 24Warning Issued 5HVTrust 3Grade 3Warning Cleared 3Listed 2Score 2Scorecard 1Delisted 1Provenance 1MCP 1Surface 1Surface 1
2026-10-14
Warning Issued
Warning: eligibility issues detected
2026-10-12
Warning Cleared
Warning cleared: eligibility issues resolved
2026-10-09
Rank Moved
Rank dropped 10 spots (#334 → #344)
2026-10-07
Rank Moved
Rank dropped 65 spots (#264 → #329)
2026-10-07
Activity Score Changed
Activity score down 9pts (52 → 43)
2026-10-05
Warning Issued
Warning: eligibility issues detected
2026-10-03
Warning Cleared
Warning cleared: eligibility issues resolved
2026-09-30
Warning Issued
Warning: eligibility issues detected
2026-09-29
Warning Cleared
Warning cleared: eligibility issues resolved
2026-09-28
Warning Issued
Warning: eligibility issues detected
2026-09-24
Tool Surface Changed
Detected tool/plugin surface changed: none → declared
2026-09-24
Provider Added
Runtime surface grew — new detected provider dependency: Anthropic
2026-09-24
Mcp Status Changed
Detected MCP server support changed: none → implemented
2026-09-24
Rank Moved
Rank rose 42 spots (#292 → #250)
2026-09-23
Provenance Added
Package provenance attestation detected
2026-09-23
Grade Changed
Trust grade D → B
2026-09-23
Rank Moved
Rank rose 657 spots (#949 → #292)
2026-09-23
HVTrust Changed
HVTrust up 46.1pts (25.9 → 72.0)
2026-09-22
Newly Listed
First tracked at rank #949
2026-09-21
Removed From Active Tracking
Removed from active tracking
2026-09-16
Rank Moved
Rank rose 30 spots (#272 → #242)
2026-09-14
Rank Moved
Rank dropped 11 spots (#260 → #271)
2026-09-13
Rank Moved
Rank dropped 48 spots (#212 → #260)
2026-09-12
Rank Moved
Rank dropped 19 spots (#193 → #212)
2026-09-10
Rank Moved
Rank dropped 28 spots (#167 → #195)
2026-09-07
Warning Issued
Warning: eligibility issues detected
2026-09-07
Rank Moved
Rank rose 28 spots (#192 → #164)
2026-09-05
Rank Moved
Rank dropped 42 spots (#147 → #189)
2026-09-03
Grade Changed
Trust grade C → B
2026-09-03
Rank Moved
Rank rose 549 spots (#694 → #145)
2026-09-03
HVTrust Changed
HVTrust up 25.0pts (50.6 → 75.6)
2026-09-02
Rank Moved
Rank dropped 34 spots (#660 → #694)
2026-09-01
Rank Moved
Rank dropped 24 spots (#636 → #660)
2026-08-31
Rank Moved
Rank dropped 28 spots (#608 → #636)
2026-08-30
Scorecard Added
OSSF Scorecard: 4.8/10
2026-08-30
Grade Changed
Trust grade D → C
2026-08-30
Rank Moved
Rank rose 147 spots (#755 → #608)
2026-08-30
HVTrust Changed
HVTrust up 6.8pts (43.4 → 50.2)
2026-08-29
Rank Moved
Rank dropped 47 spots (#708 → #755)
2026-08-28
Rank Moved
Rank dropped 24 spots (#684 → #708)
2026-08-27
Rank Moved
Rank dropped 23 spots (#661 → #684)
2026-08-26
Rank Moved
Rank dropped 99 spots (#562 → #661)
2026-08-24
Rank Moved
Rank dropped 13 spots (#547 → #560)
2026-08-22
Rank Moved
Rank rose 12 spots (#557 → #545)
2026-08-16
Rank Moved
Rank dropped 11 spots (#548 → #559)
2026-08-10
Rank Moved
Rank dropped 21 spots (#552 → #573)
2026-08-09
Activity Score Changed
Activity score down 6pts (60 → 54)
2026-08-08
Newly Listed
First tracked at rank #532
GitHub → Website → npm: @storybook/addon-mcp

Embed Badge Badge guide for maintainers →

For maintainers
HVTrust 69.7 Grade B
Markdown:
[![HVTrust](https://hvtracker.net/badge/storybook-mcp-addon.svg)](https://hvtracker.net/agents/storybook-mcp-addon)
HTML:
<a href="https://hvtracker.net/agents/storybook-mcp-addon"><img src="https://hvtracker.net/badge/storybook-mcp-addon.svg" alt="HVTrust"></a>

Other agents in MCP Servers

Data sources
GitHub REST API (repo, commits, stars, forks, license) · npm Registry (downloads, provenance) · OpenSSF Scorecard CLI
Each agent's signals refresh once daily across 6 staggered batches. Methodology v4.4 · Raw JSON