nteract/semiotic (nteract/semiotic) is an MCP server listed on the M8ven Trust Index. It scores 89 out of 100, grade B. It declares 16 tools. No publisher has claimed this listing.

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B
Caution
89/100
2 months ago

nteract/semiotic

MCP for Semiotic, a streaming/static data visualization library

→ nteract/semiotic· listed on glama

Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

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Who stands behind it

nteract

Source: Glama · also listed on npm

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// key findings
⚠️
Known vulnerabilities in dependencies: 1 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
🔐
You'll be asked for 1 credential: OPENAI_APPS_CHALLENGE_TOKEN
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// known CVEs in dependencies1 high1 low

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

highesbuild@0.28.0GHSA-gv7w-rqvm-qjhr

esbuild: Missing binary integrity verification in Deno module enables remote code execution via NPM_CONFIG_REGISTRY

lowesbuild@0.28.0GHSA-g7r4-m6w7-qqqr

esbuild allows arbitrary file read when running the development server on Windows

Depend on this server? Get alerted when its CVEs change.Watch this server free →
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configMCP_ALLOWED_HOSTSbinary, exposes /mcp plus health endpoints, and supports for production
🔐 secretOPENAI_APPS_CHALLENGE_TOKENso HTTP mode serves the raw token from
configSEMIOTIC_AI_SCHEMA_ONLY
configSEMIOTIC_SCENE_TO_SVG
configTEST_TYPES_VERBOSE
// quality suggestions

Dependencies

78 dependencies, 3 flagged: @axe-core/playwright, @playwright/test, playwright-chromium

Tool annotations

1/16 tools have annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

15/16 tools missing one or more hints — getSchema (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); suggestChart (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); renderChart (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +12 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tool test coverage

Only 1/16 tools referenced in tests (6%)

Write tests that reference each tool by name so every tool has at least one test.

Shell command execution

17 child_process calls — runs shell commands

Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.

Dev dependencies

1 critical/high in dev-only deps (does not ship to users)

Upgrade dev dependencies when convenient.

Dependency freshness

15/15 production deps abandoned (no release in 2+ years): d3-brush@2022-06-14 (4y), d3-chord@2022-06-14 (4y), d3-force@2022-06-14 (4y)

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 5 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Verified](https://m8ven.ai/badge/mcp/nteract/semiotic?variant=verified)](https://m8ven.ai/mcp/nteract/semiotic)
Shows verification status without the grade. Want the grade badge instead? Remove ?variant=verified from the URL.
commit: 626cc0836988b47bc40e190c6a514c717c34c4f7
code hash: c8d3cbc19b2bbfd2e3b0a0d3e0d0727168d893a1e386d49da801ea9e388a1fe6
verified: 6/16/2026, 12:05:06 PM
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