mail-cal-drive-mcp

[](LICENSE) [](https://nodejs.org) [](https://docs.docker.com/compose/) [](https://modelcontextprotocol.io)

A self-hosted Model Context Protocol (MCP) server for multi-account email, calendar, and cloud storage. Connect Microsoft 365, Google Workspace, and IMAP accounts to any MCP client — Claude Desktop, Claude Code, VS Code, Cursor, and more.

Runs locally in Docker with Postgres. Credentials encrypted at rest. Survives reboots without re-authorization.

| Provider | Email | Calendar | Drive | |----------|-------|----------|-------| | Microsoft 365 | ✅ | ✅ | ✅ OneDrive | | Google Workspace | ✅ | ✅ | ✅ Google Drive | | IMAP | ✅ | ❌ | ❌ |

• Docker and Docker Compose
• Node.js 20+ (for local development only)

# 1. Clone
git clone https://github.com/rumbitopi/mail-cal-drive-mcp.git
cd mail-cal-drive-mcp

# 2. Configure
cp .env.example .env

# 3. Generate keys (run 3 times — one for each)
node -e "console.log(require('crypto').randomBytes(32).toString('hex'))"
# Paste into .env as POSTGRES_PASSWORD, CREDENTIAL_ENCRYPTION_KEY, and API_KEY
# Update DATABASE_URL to use the same POSTGRES_PASSWORD

# 4. Start (server runs with zero providers — configure them later)
docker compose up --build -d

# 5. Verify health
curl http://localhost:3100/health

# 6. Verify MCP
curl -X POST http://localhost:3100/mcp \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"