I want to make an auction like platform where a user can put a product for selling and another user can buy it from him. I want the transaction process to be between the seller and the buyer only, but I want also for the platform to take a commission fee.
Is there any payment service that provides this kind three-actor transaction process in its API?
1 transaction process, payment directly from the buyer to the seller and a certain fee for the platform.
You could use Adaptive Payments to perform this kind of transaction.