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Free/Busy Query

Google Calendar

Check busy intervals across connected Google calendars without reading event details.

Capability
Calendar management
Current price
$0.0050/call
Availability
Connected app
Last accepted verification

What this API does

Returns busy intervals for up to 50 calendars in a bounded time range without exposing event titles or descriptions. Always one $0.0050 request.

Agents select this operation with tool ID google-calendar.free-busy, then inspect its current executable contract before a run.

Public input and output shape

Input

bodyobject · required

Bounded request body sent to the connected application.

Output

calendarsobject

Returned calendars value.

kindstring

Returned kind value.

timeMaxstring

Returned time max value.

timeMinstring

Returned time min value.

Example request and output

This reviewed worked example is shared with inspect. Inspect also returns the current executable schema and price estimate before a paid run.

Request

{
  "tool_id": "google-calendar.free-busy",
  "input": {
    "body": {
      "items": [
        {
          "id": "YOUR-GOOGLE-CALENDAR-ID"
        }
      ],
      "timeMax": "2026-08-25T17:00:00Z",
      "timeMin": "2026-08-25T09:00:00Z",
      "timeZone": "Europe/London"
    }
  }
}

Output

{
  "kind": "calendar#freeBusy",
  "timeMax": "2026-08-17T17:00:00.000Z",
  "timeMin": "2026-08-17T09:00:00.000Z",
  "calendars": {
    "primary": {
      "busy": [
        {
          "end": "2026-08-17T10:30:00Z",
          "start": "2026-08-17T10:00:00Z"
        }
      ]
    }
  }
}
Teaching errors and limitations
  • connection_required: This capability acts on your own Google Calendar, which isn't connected yet.Open connect_url, approve Google Calendar event and calendar-list access, then retry this run unchanged.
Updated
21 August 2026

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