Chrome Auto Appointment Booker

I want a Google Chrome extension that automatically secures hard-to-get personal-event slots for me. Once I enter the event URL and preferred time range, the add-on should keep checking availability in the background and complete the booking the instant a spot opens—no manual refreshes on my side... (Budget: ₹12500 - ₹37500 INR, Jobs: API Integration, Frontend Development, Google Chrome, JavaScript, PHP, Software Architecture, Software Development, Web Development)