YDrogen/calendar-mcp

Enables MCP clients to manage Google Calendar events, including CRUD operations, recurring events, free/busy queries, and push notifications via webhooks.

→ YDrogen/calendar-mcp · listed on glama

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// key findings

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

🔐

You'll be asked for 2 credentials: CALENDAR_MCP_ENCRYPTION_KEY, GOOGLE_CLIENT_SECRET

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

// required environment variables

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

🔐 secretCALENDAR_MCP_ENCRYPTION_KEY— No auto-generated 64-character hex string for AES-256-GCM token encryption

configGOOGLE_CLIENT_ID— Yes — Google OAuth2 client ID

🔐 secretGOOGLE_CLIENT_SECRET— Yes — Google OAuth2 client secret

configHTTP_PORT— No 3000 HTTP server port for SSE and webhook endpoints

configMCP_ALLOWED_HOSTS— No — Comma-separated allowed hosts for HTTP transport (DNS rebinding protection). When unset, all hosts are allowed

configOAUTH_PORT— 6. Add http://localhost:3500/oauth2callback as an authorized redirect URI (or use your configured )

// 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 2 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/ydrogen-calendar-mcp-11g55t)](https://m8ven.ai/mcp/ydrogen-calendar-mcp-11g55t)

commit: 2fff2c7e0701c39354db6d71e5a732b07bae94e4

code hash: b01c2e9d41f7fc39d37943c2be7f1770dadb974d3c4b0cf7dee95f0a56c8a043

verified: 6/14/2026, 11:03:10 AM

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