Zoho Calendar

Zoho Calendar

Access the Zoho Calendar API with managed OAuth authentication. Manage calendars and events with full CRUD operations, including recurring events and attendee management.

Quick Start

# List calendars
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/zoho-calendar/api/v1/calendars')
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/zoho-calendar/api/v1/{endpoint}

Maton proxies requests to calendar.zoho.com/api/v1 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 Zoho Calendar OAuth connections at https://api.maton.ai.

List Connections

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections?app=zoho-calendar&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': 'zoho-calendar'}).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

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": "zoho-calendar",
    "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://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 Zoho Calendar connections, specify which one to use with the Maton-Connection header:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/zoho-calendar/api/v1/calendars')
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 include this header to ensure requests go to the intended account.

Security & Permissions

API Reference

Calendars

#### List Calendars

GET /zoho-calendar/api/v1/calendars

Example:

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

Response:

{
  "calendars": [
    {
      "uid": "fda9b0b4ad834257b622cb3dc3555727",
      "name": "My Calendar",
      "color": "#8cbf40",
      "textcolor": "#FFFFFF",
      "timezone": "PST",
      "isdefault": true,
      "category": "own",
      "privilege": "owner"
    }
  ]
}

#### Get Calendar Details

GET /zoho-calendar/api/v1/calendars/{calendar_uid}

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/zoho-calendar/api/v1/calendars/fda9b0b4ad834257b622cb3dc3555727')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

#### Create Calendar

POST /zoho-calendar/api/v1/calendars?calendarData={json}

Required Fields:

Optional Fields:

Example:

python <<'EOF'
import urllib.request, os, json, urllib.parse
calendarData = {
    "name": "Work Calendar",
    "color": "#FF5733",
    "textcolor": "#FFFFFF",
    "description": "My work calendar"
}
url = f'https://api.maton.ai/zoho-calendar/api/v1/calendars?calendarData={urllib.parse.quote(json.dumps(calendarData))}'
req = urllib.request.Request(url, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "calendars": [
    {
      "uid": "86fb9745076e4672ae4324f05e1f5393",
      "name": "Work Calendar",
      "color": "#FF5733",
      "textcolor": "#FFFFFF"
    }
  ]
}

#### Delete Calendar

DELETE /zoho-calendar/api/v1/calendars/{calendar_uid}

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/zoho-calendar/api/v1/calendars/86fb9745076e4672ae4324f05e1f5393', 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

Response:

{
  "calendars": [
    {
      "uid": "86fb9745076e4672ae4324f05e1f5393",
      "calstatus": "deleted"
    }
  ]
}

Events

#### List Events

GET /zoho-calendar/api/v1/calendars/{calendar_uid}/events?range={json}

Query Parameters:

| Parameter | Type | Description | |-----------|------|-------------| | range | JSON object | Required. Start and end dates in format {"start":"yyyyMMdd","end":"yyyyMMdd"}. Max 31-day span. | | byinstance | boolean | If true, recurring event instances are returned separately | | timezone | string | Timezone for datetime values |

Example:

python <<'EOF'
import urllib.request, os, json, urllib.parse
from datetime import datetime, timedelta
today = datetime.now()
end_date = today + timedelta(days=7)
range_param = json.dumps({
    "start": today.strftime("%Y%m%d"),
    "end": end_date.strftime("%Y%m%d")
})
url = f'https://api.maton.ai/zoho-calendar/api/v1/calendars/fda9b0b4ad834257b622cb3dc3555727/events?range={urllib.parse.quote(range_param)}'
req = urllib.request.Request(url)
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "events": [
    {
      "uid": "c63e8b9fcb3e48c2a00b16729932d636@zoho.com",
      "title": "Team Meeting",
      "dateandtime": {
        "timezone": "America/Los_Angeles",
        "start": "20260206T100000-0800",
        "end": "20260206T110000-0800"
      },
      "isallday": false,
      "etag": "1770368451507",
      "organizer": "user@example.com"
    }
  ]
}

#### Get Event Details

GET /zoho-calendar/api/v1/calendars/{calendar_uid}/events/{event_uid}

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/zoho-calendar/api/v1/calendars/fda9b0b4ad834257b622cb3dc3555727/events/c63e8b9fcb3e48c2a00b16729932d636@zoho.com')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

#### Create Event

POST /zoho-calendar/api/v1/calendars/{calendar_uid}/events?eventdata={json}

Required Fields (in eventdata):

Optional Fields:

Example:

python <<'EOF'
import urllib.request, os, json, urllib.parse
from datetime import datetime, timedelta
start_time = datetime.utcnow() + timedelta(hours=1)
end_time = start_time + timedelta(hours=1)
eventdata = {
    "title": "Team Meeting",
    "dateandtime": {
        "timezone": "America/Los_Angeles",
        "start": start_time.strftime("%Y%m%dT%H%M%SZ"),
        "end": end_time.strftime("%Y%m%dT%H%M%SZ")
    },
    "description": "Weekly team sync",
    "location": "Conference Room A"
}
url = f'https://api.maton.ai/zoho-calendar/api/v1/calendars/fda9b0b4ad834257b622cb3dc3555727/events?eventdata={urllib.parse.quote(json.dumps(eventdata))}'
req = urllib.request.Request(url, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "events": [
    {
      "uid": "c63e8b9fcb3e48c2a00b16729932d636@zoho.com",
      "title": "Team Meeting",
      "dateandtime": {
        "timezone": "America/Los_Angeles",
        "start": "20260206T100000-0800",
        "end": "20260206T110000-0800"
      },
      "etag": "1770368451507",
      "estatus": "added"
    }
  ]
}

#### Update Event

PUT /zoho-calendar/api/v1/calendars/{calendar_uid}/events/{event_uid}?eventdata={json}

Required Fields:

Optional Fields: Same as Create Event

Example:

python <<'EOF'
import urllib.request, os, json, urllib.parse
from datetime import datetime, timedelta
start_time = datetime.utcnow() + timedelta(hours=2)
end_time = start_time + timedelta(hours=1)
eventdata = {
    "title": "Updated Team Meeting",
    "dateandtime": {
        "timezone": "America/Los_Angeles",
        "start": start_time.strftime("%Y%m%dT%H%M%SZ"),
        "end": end_time.strftime("%Y%m%dT%H%M%SZ")
    },
    "etag": 1770368451507
}
url = f'https://api.maton.ai/zoho-calendar/api/v1/calendars/fda9b0b4ad834257b622cb3dc3555727/events/c63e8b9fcb3e48c2a00b16729932d636@zoho.com?eventdata={urllib.parse.quote(json.dumps(eventdata))}'
req = urllib.request.Request(url, method='PUT')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

#### Delete Event

DELETE /zoho-calendar/api/v1/calendars/{calendar_uid}/events/{event_uid}

Required Header:

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/zoho-calendar/api/v1/calendars/fda9b0b4ad834257b622cb3dc3555727/events/c63e8b9fcb3e48c2a00b16729932d636@zoho.com', method='DELETE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('etag', '1770368451507')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "events": [
    {
      "uid": "c63e8b9fcb3e48c2a00b16729932d636@zoho.com",
      "estatus": "deleted",
      "caluid": "fda9b0b4ad834257b622cb3dc3555727"
    }
  ]
}

Attendees

When creating or updating events, include attendees:

{
  "attendees": [
    {
      "email": "user@example.com",
      "permission": 1,
      "attendance": 1
    }
  ]
}

Permission levels: 0 (Guest), 1 (View), 2 (Invite), 3 (Edit) Attendance: 0 (Non-participant), 1 (Required), 2 (Optional)

Reminders

{
  "reminders": [
    {
      "action": "popup",
      "minutes": 30
    },
    {
      "action": "email",
      "minutes": 60
    }
  ]
}

Actions: email, popup, notification

Recurring Events

Use the rrule field with iCalendar RRULE format:

{
  "rrule": "FREQ=DAILY;COUNT=5;INTERVAL=1"
}

Examples:

Code Examples

JavaScript

const response = await fetch(
  'https://api.maton.ai/zoho-calendar/api/v1/calendars',
  {
    headers: {
      'Authorization': Bearer ${process.env.MATON_API_KEY}
    }
  }
);
const data = await response.json();

Python

import os
import requests
response = requests.get(
    'https://api.maton.ai/zoho-calendar/api/v1/calendars',
    headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'}
)
data = response.json()

Notes

Error Handling

| Status | Meaning | |--------|---------| | 400 | Missing Zoho Calendar connection, missing required parameter, or invalid request | | 401 | Invalid or missing Maton API key, or OAuth scope mismatch | | 404 | Resource not found | | 429 | Rate limited | | 4xx/5xx | Passthrough error from Zoho Calendar API |

Common Errors

| Error | Description | |-------|-------------| | ETAG_MISSING | etag header required for delete operations | | EXTRA_PARAM_FOUND | Invalid parameter in request | | INVALID_DATA | Malformed request data |

Troubleshooting: API Key Issues

1. Check that the MATON_API_KEY environment variable is set:

echo $MATON_API_KEY

2. 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 zoho-calendar. For example:

Resources

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