How would I take 10 altcoins (any) payment to my website? Any example code?

[2bfree]

I would like to avoid going through a middle man or broker like bitpay (I know it's for bitcoin only) and lets say for example take 10 litecoins or 10 feather coins for payment detect I got them and then give a url for instant download for the paid material like on paypal that I have been doing for years.

I cant figure this out been searching for hours. Can someone point me in the right direction?

Thanks.