Passing parameters without API access

I had a quick question about passing parameters from one site to another - without an API / developer link with the third party website.

Eg: In simplistic terms -> User inputs their requirements on Site A -> Site A then queries the database on Site B with the data required -> Pass this back to Site A and carry on the interaction.

In real life -> User searches for tickets on Site A -> Site A asks this information from Site B (there is no existing relationship / API / datafeed of any sorts) -> Site B returns the availability of tickets to Site A -> User then selects the tickets, seats , show etc and then makes the payment to Site B based on the information collected from the user.

I just want to know if this is achievable?

To make matters worse -> Site B can (depending on the implementation) use SSL as well!

Thanks in advance and Kind Regards,

Have Site B provide an API that Site A will use :)

If you are saying that such an API/datafeed is not possible, then what you are trying to do is impossible by definition: you cannot discover something for which there is no way to discover it.

Thanks Laserlight!

More than not possible - we are talking more than 100 websites that need to provide an API - which in itself can be a challenge.

Ahh!!! Well I did try :(

Thanks once again.

It is possible. It just takes time for negotiation and development, e.g., you need to convince each site owner that this service will bring more bookings and hence more revenue, then agree on technical details, then implement on both sides.