Check out FaucetBOX's api, or additionally, see if you can Xapo's API. It's going to be a pain to have to manually payout people that request it, so you're really going to have to get this fixed as soon as possible. As good as your faucet is, it will soon become worthless if people deem it as a scamming site or a site that doesn't pay out. Good luck, and keep us updated please!