Skip to main content

​
Overview

Updates an existing meeting with new times, attendees, or other details. This endpoint modifies the Google Calendar event for all attendees and sends a meeting.updated webhook.

​
Authentication

Requires Platform API Key in the Authorization header or X-API-Key header.

​
Request

PUT https://api.syncline.run/v1/meetings/{meeting_id}

​
Path Parameters

​
meeting_id
string
required
The meeting ID returned from the original schedule call

​
Request Body

​
start_time
string
required
New meeting start time in RFC3339 format (e.g., 2025-11-26T15:00:00-08:00)
​
end_time
string
required
New meeting end time in RFC3339 format (e.g., 2025-11-26T15:30:00-08:00)
​
attendees
array
Updated list of attendee emails. If omitted, keeps existing attendees.Example: ["alice@example.com", "bob@example.com"]
​
reason
string
Reason for the update (included in webhook). Defaults to "meeting_rescheduled".Examples:
  • “Rescheduled due to conflict”
  • “Extended meeting duration”
  • “Added new participant”

​
Example Request

{
  "start_time": "2025-11-26T15:00:00-08:00",
  "end_time": "2025-11-26T15:30:00-08:00",
  "attendees": ["alice@example.com", "bob@example.com"],
  "reason": "Rescheduled due to conflict"
}

​
Response

​
Success Response (200 OK)

{
  "success": true,
  "meeting_id": "meet_abc123",
  "start_time": "2025-11-26T15:00:00-08:00",
  "end_time": "2025-11-26T15:30:00-08:00",
  "attendees": ["alice@example.com", "bob@example.com"],
  "status": "updated"
}

​
Response Fields

​
success
boolean
Whether the update succeeded
​
meeting_id
string
ID of the updated meeting (same as request)
​
start_time
string
Confirmed new start time in RFC3339 format
​
end_time
string
Confirmed new end time in RFC3339 format
​
attendees
array
List of attendee emails for the updated meeting
​
status
string
Meeting status (always “updated” on success)

​
Example

const response = await fetch('https://api.syncline.run/v1/meetings/meet_abc123', {
  method: 'PUT',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    start_time: '2025-11-26T15:00:00-08:00',
    end_time: '2025-11-26T15:30:00-08:00',
    attendees: ['alice@example.com', 'bob@example.com'],
    reason: 'Rescheduled due to conflict'
  })
});

const result = await response.json();
console.log(`Meeting updated: ${result.meeting_id}`);

​
Webhook Notification

When a meeting is updated, Syncline sends a meeting.updated webhook: 
{
  "id": "wh_mno345",
  "event_type": "meeting.updated",
  "timestamp": "2025-11-22T11:00:00Z",
  "platform_id": "plat_xyz789",
  "api_version": "v1",
  "data": {
    "meeting_id": "meet_abc123",
    "attendees": ["alice@example.com", "bob@example.com"],
    "updated_at": "2025-11-22T11:00:00Z",
    "changes": {
      "updated_by": "plat_xyz789",
      "reason": "meeting_rescheduled",
      "old_start_time": "2025-11-25T14:00:00-08:00",
      "new_start_time": "2025-11-26T15:00:00-08:00",
      "old_end_time": "2025-11-25T14:30:00-08:00",
      "new_end_time": "2025-11-26T15:30:00-08:00"
    }
  }
}
Learn more about webhooks

​
Notes

  • Calendar invites are automatically updated for all attendees
  • Google Calendar sends update notifications to attendees
  • Both old and new times are included in the webhook for tracking changes
  • Only the platform that created the meeting can update it

​
Error Responses

​
400 Bad Request
error
Invalid request body or time format
​
401 Unauthorized
error
Invalid or missing API key
​
404 Not Found
error
Meeting not found or already cancelled
​
500 Internal Server Error
error
Failed to update Google Calendar event

Schedule Meeting

Create a new meeting

Cancel Meeting

Cancel an existing meeting