Calendly

Scheduling and booking platform API for managing event types, scheduled events, invitees, and availability.

Capabilities

Authentication

• Type: Bearer Token (Personal Access Token or OAuth 2.0)
• Header: Authorization: Bearer {token}
• Get key: https://calendly.com/integrations/api_webhooks (Personal Access Token)

Common Agent Operations

Get current user

GET https://api.calendly.com/users/me

List event types

GET https://api.calendly.com/event_types?user={user_uri}

List scheduled events

GET https://api.calendly.com/scheduled_events?user={user_uri}&min_start_time=2024-01-01T00:00:00Z&max_start_time=2024-12-31T23:59:59Z&status=active

Get a scheduled event

GET https://api.calendly.com/scheduled_events/{event_uuid}

List invitees for an event

GET https://api.calendly.com/scheduled_events/{event_uuid}/invitees

Cancel a scheduled event

POST https://api.calendly.com/scheduled_events/{event_uuid}/cancellation

{
  "reason": "Cancellation reason"
}

Get available times

GET https://api.calendly.com/event_type_available_times?event_type={event_type_uri}&start_time=2024-01-20T00:00:00Z&end_time=2024-01-27T00:00:00Z

Get user busy times

GET https://api.calendly.com/user_busy_times?user={user_uri}&start_time=2024-01-20T00:00:00Z&end_time=2024-01-27T00:00:00Z

List organization members

GET https://api.calendly.com/organization_memberships?organization={organization_uri}

Create webhook subscription

POST https://api.calendly.com/webhook_subscriptions

{
  "url": "https://example.com/webhook",
  "events": ["invitee.created", "invitee.canceled"],
  "organization": "{organization_uri}",
  "scope": "organization"
}

List webhook subscriptions

GET https://api.calendly.com/webhook_subscriptions?organization={organization_uri}&scope=organization

Delete webhook subscription

DELETE https://api.calendly.com/webhook_subscriptions/{webhook_uuid}

Key Metrics

Scheduled Event Data

• uri - Unique event URI
• name - Event type name
• status - Event status (active, canceled)
• start_time / end_time - Event timing
• event_type - URI of the event type
• location - Meeting location details
• invitees_counter - Count of invitees (active, limit, total)

Invitee Data

• name - Invitee full name
• email - Invitee email
• status - active or canceled
• questions_and_answers - Custom question responses
• tracking - UTM parameters
• created_at / updated_at - Timestamps

Parameters

List Scheduled Events

• user - User URI (required)
• min_start_time / max_start_time - Date range filter (ISO 8601)
• status - Filter by status (active, canceled)
• count - Number of results (default 20, max 100)
• page_token - Pagination token
• sort - Sort order (start_time:asc or start_time:desc)

List Event Types

• user - User URI
• organization - Organization URI
• active - Filter active/inactive
• count - Results per page
• sort - Sort order

When to Use

• Retrieving scheduled meeting data for CRM sync
• Monitoring booking activity and conversion rates
• Automating follow-up workflows after meetings
• Checking availability before suggesting meeting times
• Tracking meeting cancellations and no-shows
• Building custom booking interfaces

Rate Limits

• Not officially documented; implement retry logic with exponential backoff
• Use conservative request rates (avoid bursting)
• Monitor for HTTP 429 responses

Relevant Skills

• lead-generation
• sales-automation
• customer-onboarding
• appointment-scheduling