Google Calendar

Google Calendar API integration with managed OAuth. Create events, list calendars, check availability, and manage schedules. Use this skill when users want to interact with Google Calendar. For other third party apps, use the api-gateway skill (https://clawhub.ai/byungkyu/api-gateway).

Security Scan

The skill's requirements and instructions are coherent for a Google Calendar integration that proxies requests through Maton; it only needs a Maton API key and network access and does not request unrelated permissions or install code on disk.

Purpose & Capability

Name and description match the required artifact: the skill is an instruction-only wrapper that calls a Maton gateway to reach Google Calendar. Requesting MATON_API_KEY is expected for a managed-OAuth proxy service.

Instruction Scope

SKILL.md instructs the agent to call https://gateway.maton.ai and control endpoints (ctrl.maton.ai / connect.maton.ai) using MATON_API_KEY and, optionally, Maton-Connection. This stays within the declared purpose but explicitly routes calendar data through Maton-managed endpoints — users should understand that OAuth tokens and calendar data are handled by Maton, not directly by Google.

Install Mechanism

No install spec or code is provided (instruction-only), so nothing is written to disk or automatically installed. This is the lowest-risk installation mechanism.

Credentials

Only MATON_API_KEY is required, which is proportionate for a gateway-based Google Calendar integration. However, that single key grants the Maton gateway the ability to act on the user's behalf (proxy OAuth) — so protecting and trusting that key/service is important.

Persistence & Privilege

always is false and the skill is user-invocable; there is no request to modify other skills or persist broadly. Autonomous invocation is allowed by default but not elevated here.

Assessment

This skill is internally consistent: it calls Maton gateway endpoints and requires only MATON_API_KEY. Before installing, verify that maton.ai (gateway.maton.ai, ctrl.maton.ai, connect.maton.ai) is a trusted service for handling your Google OAuth tokens and calendar data. Understand that your calendar data and OAuth tokens will be proxied/stored by Maton (not directly by Google), so review Maton's privacy/security documentation, minimize permissions when authorizing, and treat MATON_API_KEY like a sensitive secret (store it securely and rotate it if compromised). Because the skill is instruction-only, it won’t install code on your system, but it will make outbound network calls whenever invoked. If you need stricter control, consider using an official Google integration or running direct API calls under your own credentials instead of a third-party gateway.

Access the Google Calendar API with managed OAuth authentication. Create and manage events, list calendars, and check availability.

Quick Start

# List upcoming events
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/google-calendar/calendar/v3/calendars/primary/events?maxResults=10&orderBy=startTime&singleEvents=true')
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/google-calendar/{native-api-path}

Replace {native-api-path} with the actual Google Calendar API endpoint path. The gateway proxies requests to www.googleapis.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 Google 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=google-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': 'google-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:

{
  "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": "google-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 Google 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/google-calendar/calendar/v3/calendars/primary/events')
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

List Calendars

GET /google-calendar/calendar/v3/users/me/calendarList

Get Calendar

GET /google-calendar/calendar/v3/calendars/{calendarId}

Use primary for the user's primary calendar.

List Events

GET /google-calendar/calendar/v3/calendars/primary/events?maxResults=10&orderBy=startTime&singleEvents=true

With time bounds:

GET /google-calendar/calendar/v3/calendars/primary/events?timeMin=2024-01-01T00:00:00Z&timeMax=2024-12-31T23:59:59Z&singleEvents=true&orderBy=startTime

Get Event

GET /google-calendar/calendar/v3/calendars/primary/events/{eventId}

Create Event

POST /google-calendar/calendar/v3/calendars/primary/events
Content-Type: application/json

{
  "summary": "Team Meeting",
  "description": "Weekly sync",
  "start": {
    "dateTime": "2024-01-15T10:00:00",
    "timeZone": "America/Los_Angeles"
  },
  "end": {
    "dateTime": "2024-01-15T11:00:00",
    "timeZone": "America/Los_Angeles"
  },
  "attendees": [
    {"email": "[e-mail]"}
  ]
}

Create All-Day Event

POST /google-calendar/calendar/v3/calendars/primary/events
Content-Type: application/json

{
  "summary": "All Day Event",
  "start": {"date": "2024-01-15"},
  "end": {"date": "2024-01-16"}
}

Update Event

PUT /google-calendar/calendar/v3/calendars/primary/events/{eventId}
Content-Type: application/json

{
  "summary": "Updated Meeting Title",
  "start": {"dateTime": "2024-01-15T10:00:00Z"},
  "end": {"dateTime": "2024-01-15T11:00:00Z"}
}

Patch Event (partial update)

PATCH /google-calendar/calendar/v3/calendars/primary/events/{eventId}
Content-Type: application/json

{
  "summary": "New Title Only"
}

Delete Event

DELETE /google-calendar/calendar/v3/calendars/primary/events/{eventId}

Quick Add Event (natural language)

POST /google-calendar/calendar/v3/calendars/primary/events/quickAdd?text=Meeting+with+John+tomorrow+at+3pm

Free/Busy Query

POST /google-calendar/calendar/v3/freeBusy
Content-Type: application/json

{
  "timeMin": "2024-01-15T00:00:00Z",
  "timeMax": "2024-01-16T00:00:00Z",
  "items": [{"id": "primary"}]
}

Code Examples

JavaScript

// List events
const response = await fetch(
  'https://gateway.maton.ai/google-calendar/calendar/v3/calendars/primary/events?maxResults=10&singleEvents=true',
  {
    headers: {
      'Authorization': `Bearer ${process.env.MATON_API_KEY}`
    }
  }
);

// Create event
await fetch(
  'https://gateway.maton.ai/google-calendar/calendar/v3/calendars/primary/events',
  {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${process.env.MATON_API_KEY}`
    },
    body: JSON.stringify({
      summary: 'Meeting',
      start: { dateTime: '2024-01-15T10:00:00Z' },
      end: { dateTime: '2024-01-15T11:00:00Z' }
    })
  }
);

Python

import os
import requests

headers = {'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'}

# List events
events = requests.get(
    'https://gateway.maton.ai/google-calendar/calendar/v3/calendars/primary/events',
    headers=headers,
    params={'maxResults': 10, 'singleEvents': 'true'}
).json()

# Create event
response = requests.post(
    'https://gateway.maton.ai/google-calendar/calendar/v3/calendars/primary/events',
    headers=headers,
    json={
        'summary': 'Meeting',
        'start': {'dateTime': '2024-01-15T10:00:00Z'},
        'end': {'dateTime': '2024-01-15T11:00:00Z'}
    }
)

Notes

• Use primary as calendarId for the user's main calendar
• Times must be in RFC3339 format (e.g., 2024-01-15T10:00:00Z)
• For recurring events, use singleEvents=true to expand instances
• orderBy=startTime requires singleEvents=true
• 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 Google Calendar connection
401	Invalid or missing Maton API key
429	Rate limited (10 req/sec per account)
4xx/5xx	Passthrough error from Google Calendar API

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://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 google-calendar. For example:

• Correct: https://gateway.maton.ai/google-calendar/calendar/v3/calendars/primary/events
• Incorrect: https://gateway.maton.ai/calendar/v3/calendars/primary/events

Resources

• Calendar API Overview
• List Calendars
• List Events
• Get Event
• Insert Event
• Update Event
• Delete Event
• Quick Add Event
• Free/Busy Query
• Maton Community
• Maton Support