I would like to find a way to access rental car bookings from the major companies (Enterprise, Budget/Avis and Hertz). I know there are API's for each that allow you to search for cars, compare and make bookings but I do not want to carry this action out. I need to access all bookings, no matter where they have been booked from and then use the data to build an app around this.
An example of this is: [login to view URL] The user selects the rental car company, enters their reference number and then the booking is retrieved.
I would like to know how this is done, using what API or integration. Once I have the answer to this, I can begin a project of developing a website and app around this.