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

# Get user profile
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.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://gateway.maton.ai/outlook/{native-api-path}

Replace {native-api-path} with the actual Microsoft Graph API endpoint path. The gateway proxies requests to graph.microsoft.com and automatically injects your OAuth token.

Authentication

All requests require the Maton API key in the Authorization header:

Authorization: Bearer $MATON_API_KEY

Environment Variable: Set your API key as MATON_API_KEY:

export MATON_API_KEY="YOUR_API_KEY"

Getting Your API Key

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

Connection Management

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

List Connections

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.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

python <<'EOF'
import urllib.request, os, json
data = json.dumps({'app': 'outlook'}).encode()
req = urllib.request.Request('https://ctrl.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

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.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": "21fd90f9-5935-43cd-b6c8-bde9d915ca80",
    "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

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.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 with the Maton-Connection header:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/outlook/v1.0/me')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Maton-Connection', '21fd90f9-5935-43cd-b6c8-bde9d915ca80')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

If omitted, the gateway uses the default (oldest) active connection.

API Reference

User Profile

GET /outlook/v1.0/me

Mail Folders

List Mail Folders

GET /outlook/v1.0/me/mailFolders

Get Mail Folder

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

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

Create Mail Folder

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

{
  "displayName": "My Folder"
}

Delete Mail Folder

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

List Child Folders

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

Messages

List Messages

GET /outlook/v1.0/me/messages

From specific folder:

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

With query filter:

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

Get Message

GET /outlook/v1.0/me/messages/{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": "recipient@example.com"
      }
    }
  ]
}

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": "recipient@example.com"
        }
      }
    ]
  },
  "saveToSentItems": true
}

Send Existing Draft

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

Update Message

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

{
  "isRead": true
}

Delete Message

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

Move Message

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

{
  "destinationId": "{folderId}"
}

Calendar

List Calendars

GET /outlook/v1.0/me/calendars

List Events

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

With date filter:

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

Get Event

GET /outlook/v1.0/me/events/{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": "attendee@example.com"
      },
      "type": "required"
    }
  ]
}

Delete Event

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

Contacts

List Contacts

GET /outlook/v1.0/me/contacts

Get Contact

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

Create Contact

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

{
  "givenName": "John",
  "surname": "Doe",
  "emailAddresses": [
    {
      "address": "john.doe@example.com"
    }
  ]
}

Delete Contact

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

Code Examples

JavaScript

const response = await fetch(
  'https://gateway.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://gateway.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

Troubleshooting: Invalid API Key

When you receive a "Invalid API key" error, ALWAYS follow these steps before concluding there is an issue:

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://ctrl.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

Resources

• Microsoft Graph API Overview
• Mail API
• Calendar API
• Contacts API
• Query Parameters