Do you offer credit card payments too along with cryptocurrencies? And which cryptocurrencies are available? How much fee do you charge? Website is very simple html code, I think it will be better to set premium, responsive template and include much more details. On another hand when I clicked instant buy and other buttons, everything is perfect with UI.
Also do you accept everyone to use your gateway globally?
The user can "top up" his or her wallet with a credit card through Changelly. It takes around 1 hour.
Nimipay is open source and is free to use. It is based on the Nimiq blockchain.
To use it in production environments with backend tx validation (a simple example is in the code), you need an engineer to customize the code to your needs. Nimipay is one of the earliest apps built on the new Nimiq Hub API.