outlook-cli

A command-line tool for Microsoft Outlook (Work/School accounts). Search, read, send, and reply to emails. List, read, and create calendar events. Built with the O365 library and Typer.

Prerequisites

• Python 3.11+
• uv package manager
• An Azure App Registration (free) with Microsoft Graph delegated permissions:
  • Mail.ReadWrite
  • Mail.Send
  • Calendars.ReadWrite

Azure App Setup

1. Go to Azure Portal > App registrations
2. Click New registration
3. Name it anything (e.g. "Outlook CLI"), set Supported account types to your preference
4. Under Authentication > Advanced settings, set Allow public client flows to Yes and save
5. Under API permissions, add the three Delegated permissions listed above
6. If your tenant requires admin consent, have an admin grant consent for the app
7. Copy the Application (client) ID — you'll need it for outlook auth login

Installation

git clone https://github.com/mhattingpete/outlook-cli.git
cd outlook-cli
uv sync

Getting Started

# Authenticate with your Azure app
outlook auth login --client-id YOUR_CLIENT_ID

# Follow the device code flow — open the URL and enter the code

# Check status
outlook auth status

Commands

Authentication

outlook auth login [--client-id ID] [--tenant-id ID]   # Authenticate via device code flow
outlook auth logout                                      # Remove stored token
outlook auth status                                      # Show auth status and config

Email

# Search / list messages
outlook mail search                                      # List recent inbox messages
outlook mail search "quarterly report"                   # Full-text search
outlook mail search --unread                             # Unread messages only
outlook mail search --from alice@company.com             # Filter by sender
outlook mail search --start-date 2025-01-01 --end-date 2025-02-01
outlook mail search --important --has-attachments        # Combine filters
outlook mail search --folder "Sent Items" --limit 10     # Different folder

# Read a message
outlook mail read MESSAGE_ID

# Send a message
outlook mail send --to bob@company.com --subject "Hello" --body "Hi Bob!"
outlook mail send --to bob@company.com --cc carol@company.com --subject "Update" --body "FYI"

# Reply to a message
outlook mail reply MESSAGE_ID --body "Thanks for the update!"
outlook mail reply MESSAGE_ID --body "Noted, thanks." --reply-all

# Mark as read/unread
outlook mail mark MESSAGE_ID                             # Mark as read (default)
outlook mail mark MESSAGE_ID --unread                    # Mark as unread

Calendar

# List events (default: next 7 days)
outlook cal list
outlook cal list --start 2025-03-01 --end 2025-03-31    # Custom date range
outlook cal list --subject "standup"                     # Filter by subject
outlook cal list --location "Room A"                     # Filter by location
outlook cal list --all-day                               # All-day events only
outlook cal list --recurring                             # Recurring events only
outlook cal list --organizer boss@company.com            # Filter by organizer

# Read event details (shows attendees, recurrence, etc.)
outlook cal read EVENT_ID

# Create an event
outlook cal create --subject "Lunch" --start "2025-02-08 12:00" --end "2025-02-08 13:00"
outlook cal create --subject "Workshop" \
  --start "2025-02-10 09:00" --end "2025-02-10 17:00" \
  --body "Full day workshop" --location "Conference Room B"

Using with Claude Code

outlook-cli works with Claude Code out of the box. Here are example prompts and what Claude does with them:

# ── Email triage ──────────────────────────────────────────
# Prompt: "Show me unread emails from alice"
outlook mail search --unread --from alice@company.com

# Prompt: "Read the first message"
outlook mail read aB3x-def4-5678-gh90

# Prompt: "Reply saying I'll handle it today"
outlook mail reply aB3x-def4-5678-gh90 --body "I'll handle this today."

# Prompt: "Mark it as read"
outlook mail mark aB3x-def4-5678-gh90

# ── Calendar management ──────────────────────────────────
# Prompt: "What's on my calendar this week?"
outlook cal list

# Prompt: "Any recurring meetings?"
outlook cal list --recurring

# Prompt: "Schedule a team lunch Friday at noon"
outlook cal create --subject "Team Lunch" \
  --start "2025-02-14 12:00" --end "2025-02-14 13:00" \
  --location "Cafeteria"

# ── Search and respond ───────────────────────────────────
# Prompt: "Find emails about the project proposal with attachments"
outlook mail search "project proposal" --has-attachments

# Prompt: "Reply-all to the latest with my feedback"
outlook mail reply msg-id --reply-all --body "Looks good — approved."

Configuration

Config and tokens are stored in ~/.outlook-cli/:

~/.outlook-cli/
├── config.toml          # client_id, tenant_id
└── o365_token.token     # OAuth token (auto-managed)

Development

# Install dev dependencies
uv sync

# Run tests
uv run pytest tests/ -v

# Run the CLI
uv run outlook --help

License

MIT