I am trying to integrate Paypal's Adaptive Payment API into my app with will be only using the peer to peer transactions but I can't do anything related to peer to peer payments. I tried using this tool from Paypal but I still haven't got any success. Through that Paypal tool, I tried sending money to my one personal sandbox account to my other personal sandbox account but it is still charging me
[3% + $0.30]
I think you have to get PayPal's business account to the get the access of their API. I recently talked to their tech support and they let me know that there is no way you can get the API where you don't have to pay the transaction fees.