booking API for website with calendar availability

Sure — if you want a booking API for a website with calendar availability, the usual setup is:

Core features

• Check availability
• Create booking
• Update / cancel booking
• Prevent double-booking
• Sync with calendar systems like Google Calendar / Outlook
• Timezone support
• Working hours, buffers, holidays, blackout dates

Typical API endpoints

Availability

GET /availability?service_id=123&date=2026-10-15 Returns available time slots.

Create booking

POST /bookings Example body:

{
  "service_id": 123,
  "customer_name": "John Doe",
  "customer_email": "john@example.com",
  "start_time": "2026-10-15T14:00:00Z",
  "duration_minutes": 30
}

Get booking

GET /bookings/{id}

Cancel booking

DELETE /bookings/{id}

Calendar availability logic

You usually calculate availability from:

• business hours
• existing bookings
• buffer time before/after bookings
• staff/resource schedules
• holidays and exceptions

Example:

• Open: 9 AM–5 PM
• Bookings: 10:00–10:30, 1:00–2:00
• Result: available slots exclude those times and any buffer periods

Recommended backend approach

Use:

• Node.js / Express, Python / FastAPI, or Django
• Database: PostgreSQL
• Calendar sync: Google Calendar API
• Caching for slot generation if needed

Important design points

• Use atomic transactions when creating bookings to avoid double-booking
• Store all times in UTC
• Convert to local time only for display
• Add idempotency keys for booking creation if payments are involved

If you want, I can help with one of these:

1. Design a full booking API spec
2. Build a calendar availability algorithm
3. Write backend code in Node.js, Python, or PHP
4. Integrate with Google Calendar
5. Create a database schema

If you want, I can generate a complete REST API design with sample code for your stack.