primer/react (primer/react) is an MCP server listed on the M8ven Trust Index. It scores 98 out of 100, grade A. It declares 20 tools. No publisher has claimed this listing.

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A
Trusted
98/100
1 month ago

primer/react

An MCP server that connects AI tools to the Primer Design System

→ primer/react· npm: @primer/mcp· listed on npm

Trusted. Deep verification, no outstanding findings, and an established reputation. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

Code Verified⚡ Live Monitored: not connected

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Who stands behind it

primer

Source: npm

Is this your MCP?

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Install from

npm

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// key findings
🚨
Secret credentials may flow to a network call
1 flow detected: FIGMA_ACCESS_TOKEN. We can’t prove the destination matches the brand the credential belongs to.
🔐
You'll be asked for 1 credential: FIGMA_ACCESS_TOKEN
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// known CVEs in dependencies1 low

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

low@babel/core@7.29.0GHSA-4x5r-pxfx-6jf8

@babel/core: Arbitrary File Read via sourceMappingURL Comment

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.
configAPI_URL
configBABEL_MODULE
🔐 secretFIGMA_ACCESS_TOKEN
configFILE_URL
configSHOW_ALL
// quality suggestions

Dependencies

56 dependencies, 3 flagged: @playwright/test, @vitest/browser-playwright, eslint-plugin-playwright

All four hints declared on every tool

20/20 tools missing one or more hints — init (missing: destructiveHint, idempotentHint, openWorldHint); list_components (missing: destructiveHint, idempotentHint, openWorldHint); get_component (missing: destructiveHint, idempotentHint, openWorldHint), +17 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 inputs are validated

11/20 tool handlers declare input schemas (55%)

Declare an inputSchema with zod/joi/yup on every tool definition.

Tool handlers catch errors

Only 5/20 tool handlers wrap calls in try/catch (25%)

Wrap each tool handler body in try/catch and return a structured error response.

Tool test coverage

Only 0/20 tools referenced in tests (0%)

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

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 4 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 Score](https://m8ven.ai/badge/mcp/primer/react)](https://m8ven.ai/mcp/primer/react)
Shows your grade and updates automatically. Prefer no grade? Append ?variant=verified to the badge URL.
commit: 2cbe47d4cab232677c3ac65a6acca98b468823df
code hash: 971beb24d6e6df976eecc65309b6c23606147d80d3ed2d5e0a6348388bf387fd
verified: 7/30/2026, 8:19:39 PM
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