Zoho Calendar

Zoho Calendar API integration with managed OAuth. Manage calendars and events with full scheduling capabilities. Use this skill when users want to read, create, update, or delete calendar events, manage calendars, or schedule meetings. For other third party apps, use the api-gateway skill (https://clawhub.ai/byungkyu/api-gateway). Requires network access and valid Maton API key.

インストール
$clawhub install 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://gateway.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://gateway.maton.ai/zoho-calendar/api/v1/{endpoint}

The gateway 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://ctrl.maton.ai.

List Connections

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

Calendars

List Calendars

GET /zoho-calendar/api/v1/calendars

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.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: json { "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://gateway.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: - name - Calendar name (max 50 characters) - color - Hex color code (e.g., #FF5733)

Optional Fields: - textcolor - Text color hex code - description - Calendar description (max 1000 characters) - timezone - Calendar timezone - include_infreebusy - Show as Busy/Free (boolean) - public - Visibility level (disable, freebusy, or view)

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://gateway.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: json { "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://gateway.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: json { "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://gateway.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: json { "events": [ { "uid": "[email protected]", "title": "Team Meeting", "dateandtime": { "timezone": "America/Los_Angeles", "start": "20260206T100000-0800", "end": "20260206T110000-0800" }, "isallday": false, "etag": "1770368451507", "organizer": "[email protected]" } ] }

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://gateway.maton.ai/zoho-calendar/api/v1/calendars/fda9b0b4ad834257b622cb3dc3555727/events/[email protected]')
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): - dateandtime - Object with start, end, and optionally timezone - Format: yyyyMMdd'T'HHmmss'Z' (GMT) for timed events - Format: yyyyMMdd for all-day events

Optional Fields: - title - Event name - description - Event details (max 10,000 characters) - location - Event location (max 255 characters) - isallday - Boolean for all-day events - isprivate - Boolean to hide details from non-delegates - color - Hex color code - attendees - Array of attendee objects - reminders - Array of reminder objects - rrule - Recurrence rule string (e.g., FREQ=DAILY;COUNT=5)

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://gateway.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: json { "events": [ { "uid": "[email protected]", "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: - dateandtime - Start and end times - etag - Current etag value (from Get Event Details)

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://gateway.maton.ai/zoho-calendar/api/v1/calendars/fda9b0b4ad834257b622cb3dc3555727/events/[email protected]?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: - etag - Current etag value of the event

Example:

python <<'EOF'
import urllib.request, os, json

req = urllib.request.Request('https://gateway.maton.ai/zoho-calendar/api/v1/calendars/fda9b0b4ad834257b622cb3dc3555727/events/[email protected]', 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: json { "events": [ { "uid": "[email protected]", "estatus": "deleted", "caluid": "fda9b0b4ad834257b622cb3dc3555727" } ] }

Attendees

When creating or updating events, include attendees:

{
  "attendees": [
    {
      "email": "[email protected]",
      "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: - Daily for 5 days: FREQ=DAILY;COUNT=5;INTERVAL=1 - Weekly on Mon/Tue: FREQ=WEEKLY;INTERVAL=1;BYDAY=MO,TU;UNTIL=20250817T064600Z - Monthly last Tuesday: FREQ=MONTHLY;INTERVAL=1;BYDAY=TU;BYSETPOS=-1;COUNT=2

Code Examples

JavaScript

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

Notes

  • Event and calendar data is passed as JSON in the eventdata or calendarData query parameter
  • Date/time format for events: yyyyMMdd'T'HHmmss'Z' (GMT) or yyyyMMdd for all-day events
  • The range parameter for listing events cannot exceed 31 days
  • The etag is required for update and delete operations - always get the latest etag before modifying
  • For delete operations, the etag must be passed as a header, not a query parameter
  • IMPORTANT: When using curl commands, use curl -g when URLs contain brackets 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

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
  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

Troubleshooting: Invalid App Name

  1. Ensure your URL path starts with zoho-calendar. For example:
  • Correct: https://gateway.maton.ai/zoho-calendar/api/v1/calendars
  • Incorrect: https://gateway.maton.ai/api/v1/calendars

Resources

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