fast-mermaid-validator-mcp (ai-of-mine/fast-mermaid-validator-mcp) is an MCP server listed on the M8ven Trust Index. M8ven has not graded it: there is no public source to read and no endpoint we can reach, so there is nothing for us to inspect. No publisher has claimed this listing.

Back to MCP Trust Indexm8ven
C
Caution
74/100
13 days ago

fast-mermaid-validator-mcp

→ ai-of-mine/fast-mermaid-validator-mcp· listed on modelscope

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

ai-of-mine

Source: modelscope

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// key findings
⚠️
Known vulnerabilities in dependencies: 3 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.
// known CVEs in dependencies3 high9 medium2 low

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

highmulter@2.1.1GHSA-72gw-mp4g-v24j

Multer vulnerable to Denial of Service via deeply nested field names

highaxios@1.16.1GHSA-gcfj-64vw-6mp9

Axios Node HTTP adapter can use an inherited proxy after interceptor config cloning

highform-data@4.0.5GHSA-hmw2-7cc7-3qxx

form-data: CRLF injection in form-data via unescaped multipart field names and filenames

mediumaxios@1.16.1GHSA-42h9-826w-cgv3

Axios: Excessive recursion in formDataToJSON can cause denial of service

mediumaxios@1.16.1GHSA-7q8q-rj6j-mhjq

Axios: Nested axios option objects can consume polluted prototype values

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.
configCLEANUP_INTERVAL3600000 # 1 hour cleanup interval
configCORS_ORIGIN
configDISK_THRESHOLD
configENABLE_SVG_GENERATION
configHEADERS_TIMEOUT6000 # Headers timeout (must be > keep-alive)
configHOST
configHSTS_MAX_AGE31536000 # HTTPS Strict Transport Security
configKEEP_ALIVE_TIMEOUT5000 # Keep-alive timeout
configKUBERNETES_SERVICE_HOST
configLOG_FILElogs/app.log
configLOG_FORMAT
configLOG_LEVELLogging level info
configLOG_MAX_FILES
configLOG_MAX_SIZE
configLOG_TO_FILE
configMAX_CONNECTIONS1000 # Maximum concurrent connections
configMAX_HEADERS_COUNT2000 # Maximum headers per request
configMAX_REQUESTS_PER_SOCKET0 # Max requests per socket (0 = unlimited)
configMAX_REQUEST_SIZE
configMCP_AUTH_ENABLED
configMCP_CORS_ORIGIN
configMCP_HTTP_HOST
configMCP_HTTP_PORT
configMCP_MODE
configMCP_STATEFUL✅ Stateful mode opt-in via =true
configMEMORY_THRESHOLD
configPUPPETEER_TIMEOUT
configSERVER_TIMEOUT30000 # Server timeout in milliseconds
configSYNTAX_RULES_DIR
configVALIDATION_TIMEOUT
Deployment configuration, supplied by whoever hosts the server. Users are not asked for these.
deployPORT
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

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

All four hints declared on every tool

4/4 tools missing one or more hints — validate-diagrams (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); validate-files (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); fix-diagrams (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +1 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

Only 0/4 tool handlers declare input schemas (0%)

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

Tool test coverage

Only 0/4 tools referenced in tests (0%)

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

Shell command execution

2 child_process/subprocess calls in production code — runs shell commands (test-mcp-comprehensive.js:49, test-mcp-comprehensive.js:126)

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

No arbitrary install scripts

Has postinstall/preinstall script — runs arbitrary code on npm install

Remove postinstall/preinstall hooks unless they’re essential.

Production dependencies are patched

0 critical, 1 high severity in production deps — multer@2.1.1 (high), morgan@1.10.1 (low)

Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.

Dev dependencies

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

Upgrade dev dependencies when convenient.

Dependency freshness

2/19 production deps stale: jison@2022-06-19 (4.2y), swagger-ui-express@2024-05-31 (2.2y)

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 8 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
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commit: c431844ed233706cd677bc065183e5eabc135645
code hash: 17b4571b11d1d301a02eff058c3360040dff9437b96a594c9392bd059007dba9
verified: 8/13/2026, 9:18:53 PM
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