C-Cex API does not allow you to withdraw, it doesn't have that option.
you can check it out here:
https://c-cex.com/?id=apii must say what you want is not such a good idea, and it is not safe either. it is best if you use your own wallet and do the withdrawals that way. using an exchange like this to pay your customer can cause a lot of trouble, for example a couple of days ago they had a 30+ hour long maintenance for their bitcoin wallet which means no withdrawal for your customers!
or their site may go down for maintenance, and a lot of other trouble.
The advantages out way the disadvantages. C-Cex has a lot of different coins my customers can use on my site. I didn't know about the down times you are talking about but I could always use a disclaimer telling my customers to expect payment within 24 to 48 hours.
If C-Cex API does not allow withdraws could there be a possible hack around? Like some how creating a hidden form on my customer cash out page that would log onto my C-Cex account and auto fill my customers withdraw info such as address and amount then send payments after everything has been verified with another script without ever having the customer know what just happen on the back end?
Was thinking about making a hidden Iframe to do what I stated above but I'm afraid customers may receive a C-Cex cookie or something that could be a security risk to me that someone happens to find my C-Cex login info.
Not sure if I'm making sense.