Google Calendar

48 tools available · 7 triggers

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

scheduling & booking

Connect Google Calendar Visit Google Calendar ↗

Connect Google Calendar to Definable to automate repetitive tasks, sync data with the rest of your stack, trigger on real-world events. Personas call Google Calendar's 48 tools (and react to 7 triggers) directly from chat or scheduled flows. You can wire it into any persona to read, write, and react when an event fires.

Common workflows with Google Calendar

Trigger on event

Listen for a new event
Parse and validate the payload
Take an action with the linked tool

Daily summary

Pull yesterday's activity
Summarise with the model of your choice
Send the digest via email or Slack

Cross-tool sync

Read records from one app
Transform with a persona
Write the result back via this integration

Google Calendar actions 48

Every Google Calendar action below is a callable tool any Definable persona can invoke.

Delete ACL Rule

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

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

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

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

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

Updates an access control rule for the specified calendar.

Watch ACL Changes

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

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

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

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

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

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

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

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

Delete Calendar

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

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

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

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

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

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": ["[email protected]", {"email": "[email protected]", "optional": true}] }

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

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

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

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

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

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

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

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

Watch Events

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

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

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)

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

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)

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

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

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

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

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)

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

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

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

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

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

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

List Settings

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

Watch for changes to Settings resources.

Sync Events (Deprecated)

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

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.

Frequently asked questions

What can I automate with Google Calendar on Definable?

Anything Google Calendar exposes through its API. Common scheduling & booking workflows on Definable include automate repetitive tasks, sync data with the rest of your stack, trigger on real-world events. Personas can call any of the 48 Google Calendar tools directly, or react to its 7 triggers, then chain the result into another integration without you writing code.

How does Google Calendar authentication work?

Google Calendar uses OAUTH2 on Definable. You connect once from the integrations page, scoped to the permissions you choose, and from then on any persona that has the integration enabled can act on your behalf. Tokens are encrypted at rest and rotated automatically.

Is the Google Calendar integration included in my Definable plan?

Yes — every Definable plan, including Starter, includes access to all 48 Google Calendar tools. You only need a separate Google Calendar subscription if Google Calendar itself charges per seat or per API call.

Is using Google Calendar through Definable secure?

Every call from a persona to Google Calendar is logged with the user, persona, prompt, and response. Tokens never leave Definable's secrets vault, scopes are configurable per persona, and you can revoke access at any time from the integration page.

How do I get started with Google Calendar on Definable?

Sign up for Definable, open the integrations page, find Google Calendar, and connect via OAuth or API key. You can immediately attach Google Calendar to any persona and start running workflows. The free Starter plan includes 5,000 credits/month.

What Google Calendar actions does Definable expose?

Definable exposes all 48 Google Calendar actions as callable tools — including `Delete ACL Rule`, `Get ACL Rule`, `Create ACL Rule`, plus 45 more. Each tool gets a typed parameter schema so personas know exactly how to call it.

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