I transfer from my Paxum checking account to my card via the API, with the help of this very nice little app that Center did:
https://gfy.com/sell-and-buy-forum/11...ol-mobile.html
Security? Yes, indeed. In Paxum you, as account holder, can select what functions you want to allow for via API, this app only requires a few functions and none of them include transferring to another account holder, so your money are always safe.
Quick and easy can I check my balance on my phone and then with two clicks, transfer money to my card. The API does not seem to be affected like their website, because I have never been denied a transfer even when reports come in here that people cannot transfer to card.