@mcp-z/mcp-outlook

Docs: https://mcp-z.github.io/mcp-outlook Outlook MCP server for searching, reading, and sending Microsoft 365 mail.

Common uses

• Search and read messages
• Send and reply to emails
• Manage categories and export messages to CSV

Transports

MCP supports stdio and HTTP.

Stdio

{
  "mcpServers": {
    "outlook": {
      "command": "npx",
      "args": ["-y", "@mcp-z/mcp-outlook"]
    }
  }
}

HTTP

{
  "mcpServers": {
    "outlook": {
      "type": "http",
      "url": "http://localhost:9003/mcp",
      "start": {
        "command": "npx",
        "args": ["-y", "@mcp-z/mcp-outlook", "--port=9003"]
      }
    }
  }
}

start is an extension used by npx @mcp-z/cli up to launch HTTP servers for you.

Create a Microsoft app

1. Go to Azure Portal.
2. Navigate to Azure Active Directory > App registrations.
3. Click New registration.
4. Choose a name and select a supported account type.
5. Copy the Application (client) ID and Directory (tenant) ID.
6. Select your MCP transport (stdio for local and http for remote) and platform

• For stdio, choose "Authentication", + Add Redirect URI, "Mobile and desktop applications" platform
• For http, choose "Authentication", + Add Redirect URI, "Web" platform, add your URL (default is http://localhost:3000/oauth/callback based on the --port or PORT)
• For local hosting, add "http://localhost" for Ephemeral redirect URL

7. Enable OAuth2 scopes in API Permissions: openid profile offline_access https://graph.microsoft.com/User.Read https://graph.microsoft.com/Mail.ReadWrite https://graph.microsoft.com/Mail.Send https://graph.microsoft.com/MailboxSettings.ReadWrite

OAuth modes

Configure via environment variables or the env block in .mcp.json. See server.json for the full list of options.

Loopback OAuth (default)

Environment variables:

MS_CLIENT_ID=your-client-id
MS_TENANT_ID=common
MS_CLIENT_SECRET=your-client-secret

Example (stdio) - Create .mcp.json:

{
  "mcpServers": {
    "outlook": {
      "command": "npx",
      "args": ["-y", "@mcp-z/mcp-outlook"],
      "env": {
        "MS_CLIENT_ID": "your-client-id",
        "MS_TENANT_ID": "common"
      }
    }
  }
}

Example (http) - Create .mcp.json:

{
  "mcpServers": {
    "outlook": {
      "type": "http",
      "url": "http://localhost:3000",
      "start": {
        "command": "npx",
        "args": ["-y", "@mcp-z/mcp-outlook", "--port=3000"],
        "env": {
          "MS_CLIENT_ID": "your-client-id",
          "MS_TENANT_ID": "common"
        }
      }
    }
  }
}

Local (default): omit REDIRECT_URI → ephemeral loopback. Cloud: set REDIRECT_URI to your public /oauth/callback and expose the service publicly.

Note: start block is a helper in "npx @mcp-z/cli up" for starting an http server from your .mpc.json. See @mcp-z/cli for details.

Device code

Useful for headless or remote environments.

{
  "mcpServers": {
    "outlook": {
      "command": "npx",
      "args": ["-y", "@mcp-z/mcp-outlook", "--auth=device-code"],
      "env": {
        "MS_CLIENT_ID": "your-client-id",
        "MS_TENANT_ID": "common"
      }
    }
  }
}

DCR (self-hosted)

HTTP only. Requires a public base URL. CSV export and /files are disabled in DCR mode; resourceStoreUri is ignored.

{
  "mcpServers": {
    "outlook-dcr": {
      "command": "npx",
      "args": [
        "-y",
        "@mcp-z/mcp-outlook",
        "--auth=dcr",
        "--port=3456",
        "--base-url=https://oauth.example.com"
      ],
      "env": {
        "MS_CLIENT_ID": "your-client-id",
        "MS_TENANT_ID": "common",
        "MS_CLIENT_SECRET": "your-client-secret"
      }
    }
  }
}

How to use

# List tools
mcp-z inspect --servers outlook --tools

# Call a tool
mcp-z call outlook message-search '{"query":"from:alice@example.com"}'

Tools

1. categories-list
2. label-add
3. label-delete
4. labels-list
5. message-get
6. message-mark-read
7. message-move-to-trash
8. message-respond
9. message-search
10. message-send
11. messages-export-csv

Resources

1. email

Prompts

1. draft-email
2. query-syntax

Configuration reference

See server.json for all supported environment variables, CLI arguments, and defaults.