Storybook MCP Addon
NPM · @STORYBOOK/ADDON-MCP · SCANNED SEP 27
Help agents automatically write and test stories for your UI components.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security90
- No malware found by supply-chain analysis.Pass
- CVE check failed: a known medium-severity CVE affects valibot 1.2.0, a direct dependency. A fixed version is available. View diagnostics → Fail
- No install/post-install scripts declared.Pass
- 1 of 14 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency97
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to storybookjs/mcp). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 8 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability0
- Schema quality not yet verified: our sandbox could not run this package, so we have no schema to assess.Unverified
Stability & Change Management0
- Stability not yet verified: our sandbox could not run this package, so we have no schema to compare.Unverified
Tool Coverage0
- Tool coverage not yet verified: our sandbox could not run this package, so we have no tool definitions to assess.Unverified
Tool Safety0
- Tool safety not yet verified: our sandbox could not run this package, so we have no tool text to scan.Unverified
Capabilities0
- Protocol version not yet verified: our sandbox could not run this package, so we never saw its MCP handshake.Unverified
Unverified: 5 categories
Categories scored 0 because our sandbox could not run this package, so we have no schema for these checks to read. That is a gap on our side rather than a finding about the package, and we only credit what we can confirm, so the score stands at 0 until we can run it. How we score packages →
How do I install the Storybook MCP Addon server?
Storybook MCP Addon runs locally as an npm package, launched with npx -y @storybook/addon-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · @storybook/addon-mcp
claude mcp add storybookjs-addon-mcp -- npx -y @storybook/addon-mcp
{
"mcpServers": {
"storybookjs-addon-mcp": {
"command": "npx",
"args": [
"-y",
"@storybook/addon-mcp"
]
}
}
} {
"servers": {
"storybookjs-addon-mcp": {
"command": "npx",
"args": [
"-y",
"@storybook/addon-mcp"
]
}
}
} codex mcp add storybookjs-addon-mcp -- npx -y @storybook/addon-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"storybookjs-addon-mcp": {
"type": "local",
"command": [
"npx",
"-y",
"@storybook/addon-mcp"
],
"enabled": true
}
}
} openclaw mcp add storybookjs-addon-mcp --command npx --arg -y --arg @storybook/addon-mcp
mcp_servers:
storybookjs-addon-mcp:
command: "npx"
args: ["-y", "@storybook/addon-mcp"] {
"McpServers": {
"storybookjs-addon-mcp": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"@storybook/addon-mcp"
]
}
}
} assistant mcp add storybookjs-addon-mcp -t stdio -c npx -a -y @storybook/addon-mcp
{
"mcpServers": {
"storybookjs-addon-mcp": {
"command": "npx",
"args": [
"-y",
"@storybook/addon-mcp"
]
}
}
} Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 7 Aug 26 0
- Dependency health: 0.72 → 0.97 ▲ functional
- 5 Aug 26 0
- Dependency health: 0.82 → 0.72 ▼ functional
- 3 Aug 26 0
- Dependency health: 0.97 → 0.82 ▼ functional
- 2 Aug 26 0
- Malware scan: unverified → pass ▲ security
- 1 Aug 26 0
- Install scripts: unverified → pass ▲ security
- Provenance: unverified → pass ▲ security
- The attested source repository moved: storybookjs/mcp security
- License: unverified → pass ▲ functional
- Maintenance: unverified → pass ▲ functional
- Licence: MIT functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 27 Sept 2026 · Analysed npm/@storybook/addon-mcp@0.6.0
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | storybookjs/mcp |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/storybookjs/mcp/.github/workflows/release.yml@refs/heads/main |
| Rekor log index | 1294120920 |
| Predicate type | https://slsa.dev/provenance/v1 |
| Subject digest | sha512:13bf66d92ee293dc22175027238f5fc1b2d092b0f4dcf89c219a4275e1616db075f4c178b4a14ac9a42d6d3ddfe9e6803f810fdbe08e2c354b090ec1d |
Background: How many MCP packages publish verified provenance →
Vulnerabilities 1 finding
| ID | CVE | Severity | Vector | Fix available |
|---|---|---|---|---|
| GHSA-5qjj-4xww-7phc | CVE-2026-59952 | medium | yes |
Background: What a vulnerability scan can and cannot prove →
Dependencies 14 packages
| Packages resolved | 14 |
|---|---|
| Stale | 1 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
Tools for package channels are captured by running the package in an isolated sandbox. Our sandbox could not run this package, so no tool list has been captured. That is a gap on our side, not a finding about the package.
What is the Storybook MCP Addon server?
Storybook MCP Addon is listed in the public MCP registry as io.github.storybookjs/addon-mcp. Help agents automatically write and test stories for your UI components. This page covers its npm package (@storybook/addon-mcp).
Is the Storybook MCP Addon server safe to use?
Storybook MCP Addon scores 46 out of 100 on VerifyMCP. We recorded 1 known advisory against it as of 27 September 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
Is the Storybook MCP Addon server still maintained?
Storybook MCP Addon is still listed as active in the MCP registry. We last reached this channel on 27 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the Storybook MCP Addon server under?
Storybook MCP Addon declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.