Proton Calendar MCP

Item: Proton Calendar MCP
Rating: 70
Author: M8ven

A dark industrial-themed MCP server that displays your Proton Calendar events directly in Claude Desktop.

→ Rixmerz/proton-calendar-app-mcp · listed on glama

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// key findings

⚠️

Known vulnerabilities in dependencies: 4 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.

// known CVEs in dependencies4 high5 medium6 low

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

high@modelcontextprotocol/sdk@1.24.0GHSA-345p-7cg4-v4c7

@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse

high@modelcontextprotocol/sdk@1.24.0GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

highvite@6.0.0GHSA-fx2h-pf6j-xcff

vite: `server.fs.deny` bypass on Windows alternate paths

highvite@6.0.0GHSA-p9ff-h696-f583

Vite Vulnerable to Arbitrary File Read via Vite Dev Server WebSocket

mediumvite@6.0.0GHSA-356w-63v5-8wf4

Vite has an `server.fs.deny` bypass with an invalid `request-target`

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// required environment variables

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

configCALENDAR_URL— "": "https://calendar.proton.me/api/calendar/v1/url/YOUR_CALENDAR_ID/calendar.ics?CacheKey=...&PassphraseKey=..."

configINPUT

// 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 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/rixmerz-proton-calendar-app-mcp-1csdlo)](https://m8ven.ai/mcp/rixmerz-proton-calendar-app-mcp-1csdlo)

commit: 659903c06cc1785be9e453cba5c04e8fffebc420

code hash: 6d0a508b9e922cc79a136e0e344df33308ddf8657d2d695ddbdafad18bcb8cf5

verified: 6/24/2026, 10:05:50 AM

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