Auto Wallet top up/exchange buy software?

[takagari]

I've seen one site so far which offers the ability to watch a wallet, and tie into your api of your exchange,
You sell one BTC it uses your exchange Fiat balance to buy 1 btc. etc.

Is anyone else working on this? the cost was pretty high for what to me seems like a pretty straight forward script/setup.

Yes i understand server space/security/etc...

But still, wondering.

This would be great for my ability to sell btc locally and not need to worry about cost fluctuations etc.


Thanks

[Patatas]

I've seen one site so far which offers the ability to watch a wallet, and tie into your api of your exchange,
You sell one BTC it uses your exchange Fiat balance to buy 1 btc. etc.

Well,too many confusions right here.You mean you have a watch only wallet on a third party site ? Dissolves the point of a "watch only wallet".Why not just keep the balance in your trading account instead ? Sorry I'm having troubles to understand the second part."Exchange Fiat Balance" ? How can you have fiat on an exchange? 

Is anyone else working on this? the cost was pretty high for what to me seems like a pretty straight forward script/setup.

Not as straight forward as it seems.

Yes i understand server space/security/etc...

Doesn't stop there,..Escrow,2FA,automation and it goes on..I could give you clarifications if you elaborate .

[takagari]

Sorry. Guess it made since in my brain.

I want a service which will watch my daily uss wallet.
And when i spend btc. It also has access to the buy api key of my exchange and will use the exchanges fiat balance to rebuy the btc i spent.
Ensuring the nunber of btc i own is always the same.
But lets me spend it?