Yes, I use such a bot for trading.
Custom developed, it integrates via API on several different popular exchanges* and generates passive income for me via arbitrage (buy bitcoin cheapest possible on x platform, sell higher on y platform). Daily profit varies obviously due to BTC price fluctuations, arbitrage fluctuations, etc. If anybody is seriously interested in it and has a decent offer, PM me

Not willing to release it publicly however for obvious reasons.
*you must have valid and existing accounts on any exchange you want it to use that is supported.
Have you developed this bot yourself or bought it somewhere? Your obvious reasons for not releasing this bot is: " I want to sell it for good price" and that is fine. I understand.
One more question: where are your trading? i.e where you can use this bot, obviously it won't work on ANY exchange.