Outlook

Access the Microsoft Outlook API (via Microsoft Graph) with managed OAuth authentication. Read, send, and manage emails, folders, calendar events, and contacts.

Quick Start

CLI:

maton outlook message list --folder Inbox --top 25

maton api '/outlook/v1.0/me/messages?$top=25'

Python:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/outlook/v1.0/me')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Base URL

https://api.maton.ai/outlook/{native-api-path}

Maton proxies requests to graph.microsoft.com and automatically injects your OAuth token.

Installation

NPM:

npm install -g @maton/cli

Homebrew:

brew install maton-ai/cli/maton

Authentication

CLI:

maton login                          # Opens browser for API key
maton login --interactive            # Skip browser, paste API key directly
maton whoami                         # Show current auth state

Manual:

1. Sign in or create an account at maton.ai
2. Go to maton.ai/settings
3. Copy your API key
4. Set your API key as MATON_API_KEY:

export MATON_API_KEY="YOUR_API_KEY"

Connection Management

Manage your Microsoft OAuth connections at https://api.maton.ai.

List Connections

CLI:

maton connection list outlook --status ACTIVE

maton api -X GET /connections -f app=outlook -f status=ACTIVE

Python:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections?app=outlook&status=ACTIVE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Create Connection

CLI:

maton connection create outlook

maton api /connections -f app=outlook

Python:

python <<'EOF'
import urllib.request, os, json
data = json.dumps({'app': 'outlook'}).encode()
req = urllib.request.Request('https://api.maton.ai/connections', data=data, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Content-Type', 'application/json')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Get Connection

CLI:

maton connection view {connection_id}

maton api /connections/{connection_id}

Python:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections/{connection_id}')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "connection": {
    "connection_id": "{connection_id}",
    "status": "ACTIVE",
    "creation_time": "2025-12-08T07:20:53.488460Z",
    "last_updated_time": "2026-01-31T20:03:32.593153Z",
    "url": "https://connect.maton.ai/?session_token=...",
    "app": "outlook",
    "metadata": {}
  }
}

Open the returned url in a browser to complete OAuth authorization.

Delete Connection

CLI:

maton connection delete {connection_id}

maton api -X DELETE /connections/{connection_id}

Python:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections/{connection_id}', method='DELETE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Specifying Connection

If you have multiple Outlook connections, specify which one to use:

CLI:

maton outlook message list --folder Inbox --connection {connection_id}

maton api /outlook/v1.0/me/messages --connection {connection_id}

Python:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/outlook/v1.0/me')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Maton-Connection', '{connection_id}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

If you have multiple connections, always specify the connection to ensure requests go to the intended account.

Security & Permissions

• Access is scoped to messages, mail folders, calendar events, and contacts within the connected Outlook account.
• All write operations require explicit user approval. Before executing any create, update, or delete call, confirm the target resource and intended effect with the user.

API Reference

User Profile

GET /outlook/v1.0/me

Example:

maton outlook whoami

Mail Folders

List Mail Folders

GET /outlook/v1.0/me/mailFolders

Example:

maton outlook folder list

Get Mail Folder

GET /outlook/v1.0/me/mailFolders/{folderId}

Well-known folder names: Inbox, Drafts, SentItems, DeletedItems, Archive, JunkEmail

Example:

maton outlook folder view {folderId}

Create Mail Folder

POST /outlook/v1.0/me/mailFolders
Content-Type: application/json

{
  "displayName": "My Folder"
}

Example:

maton outlook folder create --name "My Folder"

Delete Mail Folder

DELETE /outlook/v1.0/me/mailFolders/{folderId}

Example:

maton outlook folder delete {folderId}

List Child Folders

GET /outlook/v1.0/me/mailFolders/{folderId}/childFolders

Example:

maton outlook folder list --parent {folderId}

Messages

List Messages

GET /outlook/v1.0/me/messages

Example:

maton outlook message list

From specific folder:

GET /outlook/v1.0/me/mailFolders/Inbox/messages

Example:

maton outlook message list --folder Inbox

With query filter:

GET /outlook/v1.0/me/messages?$filter=isRead eq false&$top=10

Example:

maton outlook message list --filter "isRead eq false" --top 10

Get Message

GET /outlook/v1.0/me/messages/{messageId}

Example:

maton outlook message view {messageId}

Create Draft

POST /outlook/v1.0/me/messages
Content-Type: application/json

{
  "subject": "Hello",
  "body": {
    "contentType": "Text",
    "content": "This is the email body."
  },
  "toRecipients": [
    {
      "emailAddress": {
        "address": "[email protected]"
      }
    }
  ]
}

Example:

maton outlook message draft --to [email protected] --subject "Hello" --body "This is the email body."

Send Message

POST /outlook/v1.0/me/sendMail
Content-Type: application/json

{
  "message": {
    "subject": "Hello",
    "body": {
      "contentType": "Text",
      "content": "This is the email body."
    },
    "toRecipients": [
      {
        "emailAddress": {
          "address": "[email protected]"
        }
      }
    ]
  },
  "saveToSentItems": true
}

Example:

maton outlook message send --to [email protected] --subject "Hello" --body "This is the email body."

Send Existing Draft

POST /outlook/v1.0/me/messages/{messageId}/send

Example:

maton outlook message send {messageId}

Update Message

PATCH /outlook/v1.0/me/messages/{messageId}
Content-Type: application/json

{
  "isRead": true
}

Example:

maton outlook message update {messageId} --read

Delete Message

DELETE /outlook/v1.0/me/messages/{messageId}

Example:

maton outlook message delete {messageId}

Move Message

POST /outlook/v1.0/me/messages/{messageId}/move
Content-Type: application/json

{
  "destinationId": "{folderId}"
}

Example:

maton outlook message move {messageId} --to {folderId}

Search Messages

Example:

maton outlook message search "quarterly report"

Calendar

List Calendars

GET /outlook/v1.0/me/calendars

Example:

maton outlook calendar list

List Events

GET /outlook/v1.0/me/calendar/events

Example:

maton outlook event list

With date filter:

GET /outlook/v1.0/me/calendar/events?$filter=start/dateTime ge '2024-01-01'&$top=10

Example:

maton outlook event list --filter "start/dateTime ge '2024-01-01'" --top 10

Get Event

GET /outlook/v1.0/me/events/{eventId}

Example:

maton outlook event view {eventId}

Create Event

POST /outlook/v1.0/me/calendar/events
Content-Type: application/json

{
  "subject": "Meeting",
  "start": {
    "dateTime": "2024-01-15T10:00:00",
    "timeZone": "UTC"
  },
  "end": {
    "dateTime": "2024-01-15T11:00:00",
    "timeZone": "UTC"
  },
  "attendees": [
    {
      "emailAddress": {
        "address": "[email protected]"
      },
      "type": "required"
    }
  ]
}

Example:

maton outlook event create --subject "Meeting" --start 2024-01-15T10:00:00 --end 2024-01-15T11:00:00 --timezone UTC --attendees [email protected]

Delete Event

DELETE /outlook/v1.0/me/events/{eventId}

Example:

maton outlook event delete {eventId}

Contacts

List Contacts

GET /outlook/v1.0/me/contacts

Example:

maton outlook contact list

Get Contact

GET /outlook/v1.0/me/contacts/{contactId}

Example:

maton outlook contact view {contactId}

Create Contact

POST /outlook/v1.0/me/contacts
Content-Type: application/json

{
  "givenName": "John",
  "surname": "Doe",
  "emailAddresses": [
    {
      "address": "[email protected]"
    }
  ]
}

Example:

maton outlook contact create --given-name John --surname Doe --email [email protected]

Delete Contact

DELETE /outlook/v1.0/me/contacts/{contactId}

Example:

maton outlook contact delete {contactId}

Query Parameters

Use OData query parameters:

• $top=10 - Limit results
• $skip=20 - Skip results (pagination)
• $select=subject,from - Select specific fields
• $filter=isRead eq false - Filter results
• $orderby=receivedDateTime desc - Sort results
• $search="keyword" - Search content

Pagination

Outlook uses cursor-based pagination. The CLI automatically paginates with '--paginate'.

Example:

maton outlook message list --folder Inbox --paginate

Code Examples

CLI

# List recent inbox messages
maton outlook message list --folder Inbox --top 25

# Send an email
maton outlook message send --to [email protected] --subject hi --body "hello"

# Search for messages
maton outlook message search "quarterly report"

JavaScript

const response = await fetch(
  'https://api.maton.ai/outlook/v1.0/me/messages?$top=10',
  {
    headers: {
      'Authorization': `Bearer ${process.env.MATON_API_KEY}`
    }
  }
);

Python

import os
import requests

response = requests.get(
    'https://api.maton.ai/outlook/v1.0/me/messages',
    headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'},
    params={'$top': 10, '$filter': 'isRead eq false'}
)

Notes

• Use me as the user identifier for the authenticated user
• Message body content types: Text or HTML
• Well-known folder names work as folder IDs: Inbox, Drafts, SentItems, etc.
• Calendar events use ISO 8601 datetime format
• IMPORTANT: When using curl commands, use curl -g when URLs contain brackets (fields[], sort[], records[]) to disable glob parsing
• IMPORTANT: When piping curl output to jq or other commands, environment variables like $MATON_API_KEY may not expand correctly in some shell environments. You may get "Invalid API key" errors when piping.

Error Handling

| Status | Meaning |

|--------|---------|

| 400 | Missing Outlook connection |

| 401 | Invalid or missing Maton API key |

| 429 | Rate limited (10 req/sec per account) |

| 4xx/5xx | Passthrough error from Microsoft Graph API |

Troubleshooting: API Key Issues

CLI:

1. Check your auth state:

maton whoami

1. Verify the API key is valid by listing connections:

maton connection list

Manual:

1. Check that the MATON_API_KEY environment variable is set:

echo $MATON_API_KEY

1. Verify the API key is valid by listing connections:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Troubleshooting: Invalid App Name

1. Ensure your URL path starts with outlook. For example:

• Correct: https://api.maton.ai/outlook/v1.0/me/messages
• Incorrect: https://api.maton.ai/v1.0/me/messages

Resources

• Microsoft Graph API Overview
• Mail API
• Calendar API
• Contacts API
• Query Parameters
• Maton CLI Manual
• Maton Community
• Maton Support