Automatically transfer money from one bank account to another

Is there available any API which allow us to automatically transfer money to other bank account? I only found that I can't have it done with paypal API.

I have user money on one bank account and after some action in application I need to transfer this money to other user bank account.

So to summary it all, step by step:

• User1 send money to application bank account.

• After few hours User1 confirm some action on aplication by clicking button.

• After User1 clicked button I want to transfer money to User2 bank account from application bank account automatically.

I already have in DB every information needed to do bank transfer.

I am looking for API which would allow me to do third step which is automatically transfering money from my (app) bank account to user bank account no matter which bank he is using.

We finally end with using payu API. http://developers.payu.com/en/payouts.html#payouts_payout_creation_on_account_given

But it's limitted only to businesses which generate over 100k PLN (around 20k EUR) money turnover monthly.

Good alternative tho is revolut. Their API can handle payout to clients but is not responsible for receiving payments.