Service Booking API Development

I need a clean, well-documented REST API that lets my application manage service bookings end-to-end. The core requirement is an endpoint that can be triggered by the backend to return all available appointment dates in real time; this “find booking dates” call is the linchpin of the project.

Alongside that search capability, the same API should expose standard booking operations—creating a new reservation, modifying it, or cancelling it—so that the full lifecycle stays in one place. The stack is flexible, but please choose widely-supported technologies (Node.js with Express or Python with FastAPI are both fine) and deliver tested, version-controlled code plus a brief setup guide.

Acceptance criteria
• /availability endpoint returns date slots within <200 ms on typical load
• /book, /update, /cancel endpoints respond with clear JSON status messages
• All routes protected with token-based authentication
• Postman collection and concise README provided for hand-over

If you have solid experience designing robust, secure APIs and can hit these benchmarks quickly, I’m ready to get started.