outlook-connector

Claude Plugins

A collection of plugins that extend Claude with direct access to the tools and services you use every day.

Why plugins?

Claude is powerful out of the box, but it can't reach into your email, calendar, or other systems without help. Plugins give Claude secure, scoped access to external services so it can work with your real data — not just talk about it.

Every plugin here is:

• Non-destructive by design — plugins are built to read and create, not delete or send on your behalf
• Locally authenticated — your credentials stay on your machine, not on any third-party server
• Open source — inspect exactly what each plugin does before you install it

Plugin Marketplace

Plugin	Description	Tools	Status
Outlook Connector	Microsoft 365 email and calendar via Graph API	18	Available

Getting started

Install a plugin

Each plugin directory is self-contained. To install one:

1. Navigate to the plugin you want (e.g., outlook-connector/)
2. Follow the setup instructions in its README
3. Add the MCP server to your Claude Desktop config

Quick start: Outlook Connector

cd outlook-connector
npm install
npm run build

Add to your Claude Desktop claude_desktop_config.json:

{
  "mcpServers": {
    "outlook": {
      "command": "node",
      "args": ["/path/to/claude-plugins/outlook-connector/build/index.js"]
    }
  }
}

Then tell Claude: "Log in to my Microsoft 365 account"

Available plugins

Outlook Connector

Connect Claude to Microsoft 365 email and calendar. Works with work, school, and personal Microsoft accounts.

Email: List, read, search, archive, move, organise folders, draft replies Calendar: View schedule, create events (including recurring), update, RSVP

Built with security in mind:

• OAuth 2.0 with PKCE — no client secrets
• HTML sanitizer defends against prompt injection in email content
• Mail.Send scope is never requested — the token physically cannot send mail
• No delete operations exist

18 tools, 166 tests. See the full documentation.

How plugins work

┌──────────┐    stdio     ┌────────────────────┐    HTTPS    ┌──────────────────┐
│  Claude   │◄───────────►│  MCP Server (local) │◄──────────►│  External Service │
└──────────┘              └────────────────────┘             └──────────────────┘
                                   │
                                   ▼
                          Local token storage
                          (your machine only)

Each plugin runs as a local MCP server. Claude communicates with it over stdio. The server handles authentication and makes API calls on your behalf. Your credentials never leave your machine.

Contributing

Want to add a plugin? Each plugin needs:

1. A .claude-plugin/plugin.json manifest with name, version, description, and author
2. A .mcp.json defining the MCP server connection
3. Skills in skills/ that tell Claude when and how to use the tools
4. A README with setup instructions

Add your plugin as a top-level directory and register it in .claude-plugin/marketplace.json.

License

MIT