# Google Calendar

Google Calendar is a time management tool providing scheduling features, event reminders, and integration with email and other apps for streamlined organization

- **Category:** scheduling & booking
- **Auth:** OAUTH2
- **Composio Managed App Available?** Yes
- **Tools:** 48
- **Triggers:** 7
- **Slug:** `GOOGLECALENDAR`
- **Version:** 20260429_00

## Frequently Asked Questions

### How do I set up custom Google OAuth credentials for Google Calendar?

For a step-by-step guide on creating and configuring your own Google OAuth credentials with Composio, see [How to create OAuth2 credentials for Google Apps](https://composio.dev/auth/googleapps).

### Why am I seeing "App is blocked" when connecting Google Calendar?

The OAuth client is requesting scopes that Google hasn't verified for that client. This usually happens when you add extra scopes beyond the defaults.

Remove the additional scopes from your auth config, or create your own OAuth app and submit the scopes for verification. See [How to create OAuth2 credentials for Google Apps](https://composio.dev/auth/googleapps).

### Why am I getting "Google Calendar API has not been used in project" error?

When using custom OAuth credentials, the Google Calendar API must be enabled in the Google Cloud project that owns those credentials. Enable it in Google Cloud Console under APIs & Services, wait a few minutes, and retry.

### Why am I getting "Error 400: invalid_scope"?

The requested scopes are invalid or incorrectly formatted in the authorization URL. Verify your scope values against the [Google OAuth scopes docs](https://developers.google.com/identity/protocols/oauth2). If you're creating auth configs programmatically, see the [programmatic auth config guide](/docs/auth-configuration/programmatic-auth-configs).

### Why does the OAuth consent screen show "Composio" instead of my app?

By default, the consent screen uses Composio's OAuth app. To show your own app name and logo, create your own OAuth app and set a custom redirect URL. See [White-labeling authentication](/docs/white-labeling-authentication#using-your-own-oauth-apps).

### Why am I getting 401 errors on tool calls?

The user's access token is no longer valid. Common causes: the user revoked access, changed their password or 2FA, a Workspace admin policy changed, or Google's refresh token limit (~50 per account) was exceeded. Re-authenticating the user typically resolves this.

---

## Tools

### Delete ACL Rule

**Slug:** `GOOGLECALENDAR_ACL_DELETE`

Deletes an access control rule from a Google Calendar. Use when you need to remove sharing permissions for a user, group, or domain.

### Get ACL Rule

**Slug:** `GOOGLECALENDAR_ACL_GET`

Retrieves a specific access control rule for a calendar. Use when you need to check permissions for a specific user, group, or domain.

### Create ACL Rule

**Slug:** `GOOGLECALENDAR_ACL_INSERT`

Creates an access control rule for a calendar. Use when you need to grant sharing permissions to a user, group, or domain.

### List ACL Rules

**Slug:** `GOOGLECALENDAR_ACL_LIST`

Retrieves the list of access control rules (ACLs) for a specified calendar, providing the necessary 'rule_id' values required for updating specific ACL rules.

### Patch ACL Rule

**Slug:** `GOOGLECALENDAR_ACL_PATCH`

Updates an existing access control rule for a calendar using patch semantics (partial update). This allows modifying specific fields without affecting other properties. IMPORTANT: The ACL rule must already exist on the calendar. This action cannot create new rules. If you receive a 404 Not Found error, the rule does not exist - use ACL insert to create it first, or use ACL list to verify available rules. Each patch request consumes three quota units. For domain-type ACL rules, if PATCH fails with 500 error, this action will automatically fallback to UPDATE method.

### Update ACL Rule

**Slug:** `GOOGLECALENDAR_ACL_UPDATE`

Updates an access control rule for the specified calendar.

### Watch ACL Changes

**Slug:** `GOOGLECALENDAR_ACL_WATCH`

Tool to watch for changes to ACL resources. Use when you need to set up real-time notifications for access control list modifications on a calendar.

### Batch Events

**Slug:** `GOOGLECALENDAR_BATCH_EVENTS`

Execute up to 1000 event mutations (create/patch/delete) in one Google Calendar HTTP batch request with per-item status/results. Use this to materially reduce round-trips for bulk operations like migrations, cleanup, or large-scale updates.

### Remove Calendar from List

**Slug:** `GOOGLECALENDAR_CALENDAR_LIST_DELETE`

Tool to remove a calendar from the user's calendar list. Use when you need to unsubscribe from or hide a calendar from the user's list.

### Get Single Calendar by ID

**Slug:** `GOOGLECALENDAR_CALENDAR_LIST_GET`

Retrieves metadata for a SINGLE specific calendar from the user's calendar list by its calendar ID. This action requires a calendarId parameter and returns details about that one calendar only. NOTE: This does NOT list all calendars. To list all calendars in the user's calendar list, use GOOGLECALENDAR_CALENDAR_LIST_LIST instead.

### Insert Calendar into List

**Slug:** `GOOGLECALENDAR_CALENDAR_LIST_INSERT`

Inserts an existing calendar into the user's calendar list, making it visible in the UI. Calendars (e.g., newly created ones) won't appear in the list or UI until explicitly inserted.

### Patch Calendar List Entry

**Slug:** `GOOGLECALENDAR_CALENDAR_LIST_PATCH`

Updates an existing calendar on the user's calendar list using patch semantics. This method allows partial updates, modifying only the specified fields.

### Update Calendar List Entry

**Slug:** `GOOGLECALENDAR_CALENDAR_LIST_UPDATE`

Updates a calendar list entry's display/subscription settings (color, visibility, reminders, selection) for the authenticated user — does not modify the underlying calendar resource (title, timezone, etc.). To modify the calendar itself, use GOOGLECALENDAR_CALENDARS_UPDATE.

### Watch Calendar List

**Slug:** `GOOGLECALENDAR_CALENDAR_LIST_WATCH`

Watch for changes to CalendarList resources using push notifications. Use this to receive real-time updates when calendar list entries are modified.

### Delete Calendar

**Slug:** `GOOGLECALENDAR_CALENDARS_DELETE`

Deletes a secondary calendar that you own or have delete permissions on. Deletion is permanent and irreversible — verify the correct calendar_id before calling. You cannot delete your primary calendar or calendars you only have read/write access to. Use calendarList.list to find calendars with owner accessRole. For primary calendars, use calendars.clear instead. Parallel calls may trigger userRateLimitExceeded; sequence bulk deletions.

### Update Calendar

**Slug:** `GOOGLECALENDAR_CALENDARS_UPDATE`

Full PUT-style update that overwrites all calendar metadata fields; unspecified optional fields are cleared. Use GOOGLECALENDAR_PATCH_CALENDAR to update only a subset of fields. Mutates the underlying calendar resource (title, description, timeZone, etc.); use GOOGLECALENDAR_CALENDAR_LIST_UPDATE to change per-user display properties like color.

### Stop Channel

**Slug:** `GOOGLECALENDAR_CHANNELS_STOP`

Tool to stop watching resources through a notification channel. Use when you need to discontinue push notifications for a specific channel subscription.

### Clear Calendar

**Slug:** `GOOGLECALENDAR_CLEAR_CALENDAR`

Clears a primary calendar by deleting all events from it. The calendar itself is preserved; only its events are removed. Primary calendars cannot be deleted entirely.

### Get Color Definitions

**Slug:** `GOOGLECALENDAR_COLORS_GET`

Returns the color definitions for calendars and events. Use when you need to retrieve the available color palette for styling calendars or events.

### Create Event

**Slug:** `GOOGLECALENDAR_CREATE_EVENT`

Create a Google Calendar event using start_datetime plus duration fields. The organizer is added as an attendee unless exclude_organizer is True. By default adds Google Meet link (works for Workspace, gracefully falls back for personal Gmail). Attendees can be email strings (required) or objects with email and optional fields. No conflict checking is performed; use GOOGLECALENDAR_FREE_BUSY_QUERY to detect overlaps before creating. Returns event id and htmlLink nested under data.response_data. Example: { "start_datetime": "2025-01-16T13:00:00", "timezone": "America/New_York", "event_duration_hour": 1, "event_duration_minutes": 30, "summary": "Client sync", "attendees": ["required@example.com", {"email": "optional@example.com", "optional": true}] }

### Delete event

**Slug:** `GOOGLECALENDAR_DELETE_EVENT`

Deletes a specified event by `event_id` from a Google Calendar (`calendar_id`); idempotent — a 404 for an already-deleted event is a no-op. Bulk deletions may trigger `rateLimitExceeded` or `userRateLimitExceeded`; cap concurrency to 5–10 requests and apply exponential backoff.

### Create a calendar

**Slug:** `GOOGLECALENDAR_DUPLICATE_CALENDAR`

Creates a new, empty Google Calendar with the specified title (summary). Newly created calendars default to UTC timezone; use GOOGLECALENDAR_PATCH_CALENDAR afterward to set the desired timeZone if needed.

### Get Event

**Slug:** `GOOGLECALENDAR_EVENTS_GET`

Retrieves a SINGLE event by its unique event_id (REQUIRED). This action does NOT list or search events - it fetches ONE specific event when you already know its ID. If you want to list events within a time range, search for events, or filter by criteria like time_min/time_max, use GOOGLECALENDAR_EVENTS_LIST instead.

### Import Event

**Slug:** `GOOGLECALENDAR_EVENTS_IMPORT`

Tool to import an event as a private copy to a calendar. Use when you need to add an existing event to a calendar using its iCalUID. Only events with eventType='default' can be imported.

### Get Event Instances

**Slug:** `GOOGLECALENDAR_EVENTS_INSTANCES`

Returns instances of the specified recurring event. Use timeMin/timeMax to constrain the window; omitting bounds can return large result sets and is quota-heavy. On high-volume calls, 403 rateLimitExceeded or 429 too_many_requests may occur; apply exponential backoff (1s, 2s, 4s) before retrying.

### List Events

**Slug:** `GOOGLECALENDAR_EVENTS_LIST`

Returns events on the specified calendar. TIMEZONE WARNING: When using timeMin/timeMax with UTC timestamps (ending in 'Z'), the time window is interpreted in UTC regardless of the calendar's timezone. For example, querying '2026-01-19T00:00:00Z' to '2026-01-20T00:00:00Z' on a calendar in America/Los_Angeles (UTC-8) covers 2026-01-18 4pm to 2026-01-19 4pm local time, potentially missing events on the intended local date. To query for a specific local date, use timestamps with the appropriate timezone offset in timeMin/timeMax (e.g., '2026-01-19T00:00:00-08:00' for PST).

### List Events from All Calendars

**Slug:** `GOOGLECALENDAR_EVENTS_LIST_ALL_CALENDARS`

Return a unified event list across all calendars in the user's calendar list for a given time range. Use when you need a single view of all events across multiple calendars. An inverted or incorrect time range silently returns empty results rather than an error. An empty `items` list means no events matched the filters—adjust `time_min`, `time_max`, or `q` before concluding no events exist.

### Move Event

**Slug:** `GOOGLECALENDAR_EVENTS_MOVE`

Moves an event to another calendar, i.e., changes an event's organizer.

### Watch Events

**Slug:** `GOOGLECALENDAR_EVENTS_WATCH`

Watch for changes to Events resources. Watch channels expire; persist the channel `id` per `calendarId` to re-establish watches after expiration or restarts.

### Find event

**Slug:** `GOOGLECALENDAR_FIND_EVENT`

Finds events in a specified Google Calendar using text query, time ranges (event start/end, last modification), and event types. Ensure `timeMin` is not chronologically after `timeMax` if both are provided. Results may span multiple pages; always follow `nextPageToken` until absent to avoid silently missing events. Validate the correct match from results by checking summary, start.dateTime, and organizer.email before using event_id for mutations. An empty `items` array means no events matched — widen filters rather than treating it as an error.

### Find free slots

**Slug:** `GOOGLECALENDAR_FIND_FREE_SLOTS`

Finds both free and busy time slots in Google Calendars for specified calendars within a defined time range. If `time_min` is not provided, defaults to the current timestamp in the specified timezone. If `time_max` is not provided, defaults to 23:59:59 of the day specified in `time_min` (if provided), otherwise defaults to 23:59:59 of the current day in the specified timezone. Returns busy intervals and calculates free slots by finding gaps between busy periods; `time_min` must precede `time_max` if both are provided. This action retrieves free and busy time slots for the specified calendars over a given time period. It analyzes the busy intervals from the calendars and provides calculated free slots based on the gaps in the busy periods. Returned free slots are unfiltered by duration; callers must filter intervals to those fully containing the required meeting length. No event metadata (titles, descriptions, links) is returned; use GOOGLECALENDAR_EVENTS_LIST for event details.

### Query Free/Busy Information (Deprecated)

**Slug:** `GOOGLECALENDAR_FREE_BUSY_QUERY`

DEPRECATED: Use GOOGLECALENDAR_FIND_FREE_SLOTS instead (though this tool provides wider secondary/shared calendar coverage). Returns opaque busy intervals only—no event titles or details; use GOOGLECALENDAR_EVENTS_LIST when event details are needed.

### Get Google Calendar

**Slug:** `GOOGLECALENDAR_GET_CALENDAR`

Retrieves a specific Google Calendar, identified by `calendar_id`, to which the authenticated user has access. Response includes `timeZone` (IANA format, e.g., 'America/Los_Angeles') — use it directly when constructing `timeMin`/`timeMax` in other tools to avoid DST errors. An empty `defaultReminders` list is valid (no defaults configured). Insufficient `accessRole` may omit fields like `defaultReminders` and `colorId`.

### Get Calendar Profile (Deprecated)

**Slug:** `GOOGLECALENDAR_GET_CALENDAR_PROFILE`

DEPRECATED: Use CalendarListGet instead. Tool to retrieve the authenticated user's primary calendar profile. Use when you need to get information about the user's main calendar, including timezone, settings, and preferences.

### Get current date and time

**Slug:** `GOOGLECALENDAR_GET_CURRENT_DATE_TIME`

Gets the current date and time, allowing for a specific timezone offset. Call this tool first before computing relative dates (e.g., 'tomorrow', 'next Monday') to avoid off-by-one-day errors across timezones.

### List Buildings

**Slug:** `GOOGLECALENDAR_LIST_BUILDINGS`

Lists all buildings for a Google Workspace customer account with full details including addresses, coordinates, and floor names. Use this action when you need to retrieve the complete list of physical building locations configured in Google Workspace Calendar resources. This is useful for workspace administrators managing conference room and resource scheduling across multiple office buildings. Requires Google Workspace administrator privileges with Directory API access.

### List Calendar Resources

**Slug:** `GOOGLECALENDAR_LIST_CALENDAR_RESOURCES`

Retrieves calendar resources (such as conference rooms) from a Google Workspace domain using the Admin SDK Directory API. Use this action when you need to list available meeting rooms, conference spaces, or other bookable calendar resources in an organization. The action supports filtering by resource category, capacity, building location, and other criteria. IMPORTANT: This requires Admin SDK Directory API access and appropriate admin permissions - it is NOT available for personal Gmail accounts, only Google Workspace domains.

### List Google Calendars

**Slug:** `GOOGLECALENDAR_LIST_CALENDARS`

Retrieves calendars from the user's Google Calendar list, with options for pagination and filtering. Loop through all pages using nextPageToken until absent to avoid missing calendars. Use the primary flag and accessRole field from the response to identify calendars — display names are not valid calendar_id values. Read access (listing) does not imply write OAuth scopes.

### List Calendar Settings (Deprecated)

**Slug:** `GOOGLECALENDAR_LIST_SETTINGS`

DEPRECATED: Use GOOGLECALENDAR_SETTINGS_LIST instead. Tool to return all user settings for the authenticated user. Use when you need to retrieve calendar settings.

### Patch Calendar

**Slug:** `GOOGLECALENDAR_PATCH_CALENDAR`

Partially updates (PATCHes) an existing Google Calendar, modifying only the fields provided. At least one of summary, description, location, or timezone must be provided. Empty strings for `description` or `location` clear them.

### Patch Event

**Slug:** `GOOGLECALENDAR_PATCH_EVENT`

Update specified fields of an existing event in a Google Calendar using patch semantics (array fields like `attendees` are fully replaced if provided); ensure the `calendar_id` and `event_id` are valid and the user has write access to the calendar.

### Quick Add Event

**Slug:** `GOOGLECALENDAR_QUICK_ADD`

Parses natural language text to quickly create a basic Google Calendar event with its title, date, and time, suitable for simple scheduling; does not support direct attendee addition or recurring events, and `calendar_id` must be valid if not 'primary'.

### Remove attendee from event

**Slug:** `GOOGLECALENDAR_REMOVE_ATTENDEE`

Removes an attendee from a specified event in a Google Calendar; the calendar and event must exist. Concurrent calls on the same event can overwrite attendee lists — apply changes sequentially per event.

### Get Calendar Setting

**Slug:** `GOOGLECALENDAR_SETTINGS_GET`

Tool to return a single user setting for the authenticated user. Use when you need to retrieve a specific calendar setting value.

### List Settings

**Slug:** `GOOGLECALENDAR_SETTINGS_LIST`

Returns all user settings for the authenticated user. Results include multiple settings keyed by id (e.g., `timeZone`); locate a specific setting by its `id` field. `timeZone` values are IANA identifiers (e.g., `America/New_York`) — use directly in datetime and event logic; align with `timeZone` from GOOGLECALENDAR_GET_CALENDAR for consistent notification times.

### Watch Settings

**Slug:** `GOOGLECALENDAR_SETTINGS_WATCH`

Watch for changes to Settings resources.

### Sync Events (Deprecated)

**Slug:** `GOOGLECALENDAR_SYNC_EVENTS`

DEPRECATED: Use GOOGLECALENDAR_EVENTS_LIST instead. EventsList already handles syncToken with automatic param stripping. Synchronizes Google Calendar events, performing a full sync if no `sync_token` is provided or if a 410 GONE error (due to an expired token) necessitates it, otherwise performs an incremental sync for events changed since the `sync_token` was issued.

### Update Google event

**Slug:** `GOOGLECALENDAR_UPDATE_EVENT`

Updates an existing event in Google Calendar. REQUIRES event_id - you MUST first search for the event using GOOGLECALENDAR_FIND_EVENT or GOOGLECALENDAR_EVENTS_LIST to obtain the event_id. This is a full PUT replacement: omitted fields (including attendees, reminders, recurrence, conferencing) are cleared. Always provide the complete desired event state. Use GOOGLECALENDAR_PATCH_EVENT instead for partial edits.


## Triggers

### Attendee Response Changed

**Slug:** `GOOGLECALENDAR_ATTENDEE_RESPONSE_CHANGED_TRIGGER`

**Type:** poll

Polling trigger that fires when any attendee's RSVP changes to
    accepted, declined, or tentative. Returns attendee info and current status.

#### Configuration

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `calendarId` | string | No | The unique identifier for the calendar |
| `interval` | number | No | Periodic Interval to Check for Updates & Send a Trigger in Minutes |
| `showDeleted` | boolean | No | Whether to include deleted events in the results |

#### Payload

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `attendee_email` | string | No | Email of the attendee whose RSVP changed |
| `attendee_name` | string | No | Display name of the attendee |
| `calendar_id` | string | Yes | The calendar identifier |
| `event_html_link` | string | No | Link to the event in Google Calendar |
| `event_id` | string | Yes | The unique identifier of the event |
| `event_summary` | string | No | Event title/summary |
| `previous_response_status` | string | No | Previous RSVP status |
| `response_status` | string | Yes | Current RSVP status (accepted, declined, tentative) |

### Event Canceled or Deleted

**Slug:** `GOOGLECALENDAR_EVENT_CANCELED_DELETED_TRIGGER`

**Type:** poll

Triggers when a Google Calendar event is cancelled or deleted.
    Returns minimal data: event_id, summary (if available), and cancellation timestamp.

#### Configuration

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `calendarId` | string | No | The unique identifier for the calendar to monitor |
| `interval` | number | No | Periodic Interval to Check for Updates & Send a Trigger in Minutes |

#### Payload

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `cancelled_at` | string | No | Cancellation timestamp (from event.updated) |
| `event_id` | string | Yes | The unique identifier of the event |
| `summary` | string | No | Event title/summary (may be missing for cancelled events) |

### Event Starting Soon

**Slug:** `GOOGLECALENDAR_EVENT_STARTING_SOON_TRIGGER`

**Type:** poll

Triggers when a calendar event is within a configured number of minutes from starting.
    Returns event details, time remaining, attendees, and join links when available.

#### Configuration

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `calendarId` | string | No | The unique identifier for the calendar to monitor |
| `countdownWindowMinutes` | integer | No | Look-ahead window (in minutes) for upcoming events to evaluate |
| `includeAllDay` | boolean | No | Whether to consider all-day events (default False) |
| `interval` | number | No | Periodic Interval to Check for Updates & Send a Trigger in Minutes |
| `minutesBeforeStart` | integer | No | Trigger when an event is within this many minutes from starting |

#### Payload

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `attendees` | array | No | List of attendees |
| `calendar_id` | string | Yes | The calendar identifier |
| `countdown_window_minutes` | integer | Yes | Countdown window used for this trigger |
| `creator_email` | string | No | Email of the event creator |
| `description` | string | No | Event description |
| `event_id` | string | Yes | The unique identifier of the event |
| `hangout_link` | string | No | Google Meet link for the conference, if available |
| `html_link` | string | No | Link to the event in Google Calendar |
| `location` | string | No | Event location |
| `minutes_until_start` | number | No | Minutes remaining until event starts (>= 0) |
| `organizer_email` | string | No | Email of the event organizer |
| `start_time` | string | No | Event start time in ISO format |
| `start_timestamp` | number | No | Event start time as UNIX epoch timestamp (UTC) |
| `summary` | string | No | Event title/summary |

### Calendar Event Changes

**Slug:** `GOOGLECALENDAR_GOOGLE_CALENDAR_EVENT_CHANGE_TRIGGER`

**Type:** webhook

**SOON TO BE DEPRECATED** - Use Calendar Event Sync (polling trigger) instead.
    Real-time webhook trigger for calendar event changes. Returns event metadata only.
    For full event data, use Calendar Event Sync (polling trigger).

#### Configuration

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `calendar_id` | string | No | The unique identifier for the calendar |
| `ttl` | integer | No | The time-to-live in seconds for the notification channel |

#### Payload

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `channel_id` | string | Yes | The unique identifier passed to identify this channel |
| `resource_id` | string | Yes | The unique identifier of the resource |
| `resource_state` | string | Yes | The state of the resource |
| `resource_url` | string | Yes | The url for the resource |

### Event Created

**Slug:** `GOOGLECALENDAR_GOOGLE_CALENDAR_EVENT_CREATED_TRIGGER`

**Type:** poll

Polling trigger that fires when a new calendar event is created.
    Returns event ID, summary, start/end times, and organizer info.

#### Configuration

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `calendarId` | string | No | The unique identifier for the calendar |
| `interval` | number | No | Periodic Interval to Check for Updates & Send a Trigger in Minutes |
| `showDeleted` | boolean | No | Whether to include deleted events in the results |

#### Payload

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `calendar_id` | string | Yes | The calendar identifier |
| `end_time` | string | No | Event end time in ISO format |
| `event_id` | string | Yes | The unique identifier of the event |
| `organizer_email` | string | No | Email of the event organizer |
| `organizer_name` | string | No | Name of the event organizer |
| `start_time` | string | No | Event start time in ISO format |
| `summary` | string | No | Event title/summary |

### Calendar Event Sync

**Slug:** `GOOGLECALENDAR_GOOGLE_CALENDAR_EVENT_SYNC_TRIGGER`

**Type:** poll

Polling trigger that returns full event data including details, attendees, and metadata.
    For real-time notifications with basic info, use Calendar Event Changes (webhook).

#### Configuration

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `calendarId` | string | No | The unique identifier for the calendar |
| `interval` | number | No | Periodic Interval to Check for Updates & Send a Trigger in Minutes |
| `showDeleted` | boolean | No | Whether to include deleted events in the results |

#### Payload

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `attendees` | array | No | List of attendees |
| `calendar_id` | string | Yes | The calendar identifier |
| `conference_data` | object | No | Conference data structure containing details about the meeting |
| `created_at` | string | No | When the event was created |
| `creator_email` | string | No | Email of the event creator |
| `creator_name` | string | No | Name of the event creator |
| `description` | string | No | Event description |
| `end_time` | string | No | Event end time in ISO format |
| `event_id` | string | Yes | The unique identifier of the event |
| `event_type` | string | Yes | Type of change: created, updated, or deleted |
| `hangout_link` | string | No | Google Meet link for the conference, if available |
| `html_link` | string | No | Link to the event in Google Calendar |
| `location` | string | No | Event location |
| `organizer_email` | string | No | Email of the event organizer |
| `organizer_name` | string | No | Name of the event organizer |
| `recurring_event_id` | string | No | ID of recurring event if applicable |
| `start_time` | string | No | Event start time in ISO format |
| `status` | string | No | Event status (confirmed, tentative, cancelled) |
| `summary` | string | No | Event title/summary |
| `updated_at` | string | No | When the event was last updated |
| `visibility` | string | No | Event visibility |

### Event Updated

**Slug:** `GOOGLECALENDAR_GOOGLE_CALENDAR_EVENT_UPDATED_TRIGGER`

**Type:** poll

Triggers when an existing Google Calendar event is modified. Returns the event ID,
    change type, and the specific fields that changed with their previous and new values.

#### Configuration

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `calendarId` | string | No | The unique identifier for the calendar |
| `interval` | number | No | Periodic Interval to Check for Updates & Send a Trigger in Minutes |
| `showDeleted` | boolean | No | Whether to include deleted (cancelled) events in the results |
| `tracked_fields` | array | No | List of event fields to track for changes. start and end are compared as RFC3339 strings (preferring dateTime over date). Attendees are compared by email, displayName, responseStatus, and optional flag. |

#### Payload

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `calendar_id` | string | Yes | The calendar identifier |
| `change_type` | string | No | Type of change. Always 'updated' for this trigger |
| `event_id` | string | Yes | The unique identifier of the event |
| `updated_at` | string | No | When the event was last updated (RFC3339) |
| `updated_fields` | object | Yes | Dictionary of changed fields with old and new values |