Hi There,
I am wondering if you have incorporated a way for us as developers to be able to charge a transaction fee that goes directly or periodically into our account.
We need to charge a fee for every transaction performed using our app. The app itself is capable of adding the fee before invoking the Square Mobile POS, but we have no way of getting the money into our account.
Please let me know
Thanks
iTrans
Is this for in person payments with the Square app? If so there isn’t currently a way to have a fee for every transaction go to your account. At this time the only way to collect app_fee_money is with the Payments API. 
Yes, it is for in person and the transaction is invoked using our app which in turn launches the Square app to complete the transaction. Our app is capable of adding a fee before passing the amount to the Square mobile app
At this time collecting a fee for in person payments isn’t currently available. This is a very popular feature request and we hope to have more options for you soon, so thanks for your continued patience.
That would be great!
To be honest with you, we have been hesitant to release our app with the Square component enabled for over 2 years because of this.
Hoping to see this feature soon.
Thank you