Cal.com

Cal.com is an open-source scheduling platform that lets users create and share booking pages for appointments and events. It's used by individuals and businesses to streamline scheduling and avoid the back-and-forth of traditional methods.

Official docs: https://docs.cal.com/

Cal.com Overview

• Availability
  • Availability/Event Type
• Booking
• Webhook
• User
• Team
  • Membership
• App
• Payment
• Credential
• Organization