This will be a hard thing to do with Bitcoin, since Bitcoin in the first place isn't like a credit card where you can allow and automate your subscribers/users to automatically deduct something under their name. Easiest way to do recurring payments is using Coinbase API which even them only has the feature to notify them on a fixed period and it still requires the user to manually pay what they are due. Other options are using a time lock function for your clients but in this method it makes them feel that they spending the whole period and not taking monthly payments for you.


If you figure things out this wouldn't be a problem if you use your main BTC address as the payment address for all of your clients.