MCP Demo Server

Model Context Protocol (MCP) server implementation demonstrating production-ready patterns in TypeScript, with tools for calculation, weather, and filesystem access.

→ tylerjhayden/mcp-demo · listed on glama

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// key findings

⚠️

Known vulnerabilities in dependencies: 2 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: WEATHER_API_KEY

These are read from process.env at runtime. Make sure you trust where they’ll be sent.

// known CVEs in dependencies2 high1 low

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

highmathjs@14.0.1GHSA-29qv-4j9f-fjw5

Unsafe object property setter in mathjs

highmathjs@14.0.1GHSA-jvff-x2qm-6286

mathjs Allows Improperly Controlled Modification of Dynamically-Determined Object Attributes

lowuuid@11.0.3GHSA-w5hq-g745-h8pq

uuid: Missing buffer bounds check in v3/v5/v6 when buf is provided

Depend on this server? Get alerted when its CVEs change.Watch this server free →

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configALLOWED_FILE_PATHS— Security: Path traversal protection, restricted to , MIME type detection.

configAPI_KEYS— key1,key2 # HTTP mode only

configCORS_ORIGIN

configHTTP_PORT— 3000 # HTTP mode only

configLOG_FORMAT— pretty # jsonpretty

configLOG_LEVEL— info # debuginfowarnerror

configRATE_LIMIT_REQUESTS— 60 # Requests/min per client

configTRANSPORT_MODE— http pnpm dev

🔐 secretWEATHER_API_KEY— Edit .env and add your

configWEATHER_API_TIMEOUT

configWEATHER_CACHE_TTL— 600 # Seconds (10 min default)

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 1 concrete improvement 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/tylerjhayden-mcp-demo-a0fq0o)](https://m8ven.ai/mcp/tylerjhayden-mcp-demo-a0fq0o)

commit: 65dd9568d3ab0cd7bcca900200dae55568395e38

code hash: 424738818841289dcb382cdaa645f3496189e0938dab3cea94e23c0ac55e173d

verified: 6/11/2026, 11:54:34 AM

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