Catch calendar conflicts from new Notion items automatically
You schedule something in Notion without checking whether the time is already spoken for, and the clash only surfaces later. Notis reads the new item, searches Google Calendar for anything overlapping, and flags the conflict, so you can fix it early instead of apologizing for a double booking.
Trigger
Page Created
Triggers when a new Notion page is created. Customer optionally scopes with at most one of: - data_source_id: new row in this data source - parent_page_id: new sub-page under this page (immediate parent only) With neither set, fires for any new page in the workspace the integration has access to. Notion sends ~60s aggregation latency on most events.
Action
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.
Why this helps
New commitments get scheduled in Notion without a look at the calendar, so overlaps and double bookings surface too late to fix cleanly.
- Overlaps get flagged before they become a problem
- No silent double bookings hiding until the day arrives
- Confidence that a new commitment actually fits
- Fewer awkward reschedules and apologies
Setup
Build it in a few focused steps.
- 1Connect Notion and Google Calendar to Notis from the portal.
- 2Open Automations, click New Automation, or ask Notis in any channel.
- 3Describe it: when a new dated item is created in Notion, search Google Calendar for conflicts at that time and flag any overlap.
- 4Pick the Page Created trigger and choose the channel where Notis reports findings.
- 5Test by creating one item at a busy time and confirming the conflict is flagged.
Questions about this workflow
What counts as a conflict?
Any existing event that overlaps the new item's time. Notis returns the matches so you can decide what to do.
Does it move or cancel anything automatically?
No. This automation surfaces conflicts so you stay in control. Pair it with a reschedule automation if you want action taken.
Can it check multiple calendars?
Yes. Name the calendars in the prompt and Notis will look across all of them for overlaps.
When this happens · Trigger
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Supported Triggers and Actions
Notis builds workflows that link Notion to Google Calendar. A trigger fires from one place; an action lands in another.
Notion triggers
Google Calendar actions
All Page Events
Triggers when any Notion page is created or updated across the workspace.
Insert Calendar into List
Inserts an existing calendar into the user's calendar list.
Comment Created
Triggers when a new comment is created in Notion. Optional `page_id` filter scopes to comments on a specific page. When omitted, fires for any new comment in the workspace the integration has access to. Requires the 'Read comments' capability on the Notion integration. If a connection was authorized before that capability was enabled, the user must re-authorize the connection for comment events to flow.
Update Calendar List Entry
Updates an existing entry on the user\'s calendar list.
New Comment
Triggers when a new comment is added to a specified Notion block or page.
Delete Calendar
Deletes a secondary calendar. use calendars.clear for clearing all events on primary calendars.
Database Created
Triggers when a new Notion database (the container) is created. A database is the post-2025-09-03 container that holds one or more data sources. This trigger fires for the container's creation event (`database.created`), distinct from `NOTION_DATASOURCE_CREATED` which fires when a new data source is added to an existing database. Most customers calling Notion's `POST /v1/databases` (the legacy API) or creating a database via the Notion UI will see this event. Adding a new data source to an existing database fires `data_source.created` instead — use `NOTION_DATASOURCE_CREATED` for that. Notion's payload puts `entity.type: "block"` (the container is a `child_database` block in the content tree) and `entity.id` is the database id.
Update Calendar
Updates metadata for a calendar.
Data Source Created
Triggers when a new Notion data source is created. Fires workspace-wide. The payload's `data.parent` carries the data source's tree parent (typically the teamspace) for downstream filtering. A single template-based database creation can fire multiple `data_source.created` events at once — one per data source the template instantiates.
Clear Calendar
Clears a primary calendar. this operation deletes all events associated with the primary calendar of an account.
Data Source Schema Updated
Triggers when a Notion data source's schema is updated. Fires on column add / remove / rename. Payload includes `data.updated_properties: [{id, name, action}]` so consumers can discriminate the kind of change downstream. Optional `data_source_id` filter scopes to schema changes on a single data source. When omitted, fires for any schema change in the workspace the integration has access to. Note: adding a column also fires `page.properties_updated` once per existing row in the data source. Customers wanting a single structural-change signal should use this trigger.
Create Event
Creates an event on a google calendar, needing rfc3339 utc start/end times (end after start) and write access to the calendar. by default, adds the organizer as an attendee unless exclude organizer is set to true.
New Page
Triggers when a new page is added to a Notion database.
Delete event
Deletes a specified event by `event id` from a google calendar (`calendar id`); this action is idempotent and raises a 404 error if the event is not found.
Page Added to Page
Fires when a new subpage (a `child_page` type block) is added under a specified parent Notion page.
Create a calendar
Creates a new, empty google calendar with the specified title (summary).
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