Smarkets has been OK. There's very little scope for arbitrage between Betfair and Smarkets markets, although I've had a couple of small scores doing that. Mostl

Smarkets has been OK. There's very little scope for arbitrage between Betfair and Smarkets markets, although I've had a couple of small scores doing that. Mostly, I can usually get a reasonable amount matched at the same price as Betfair, and only pay 2% commission on profits. I don't trade that much or play in running. Smarkets is really crap for in running bets. It takes far to long for the bet to be placed. They also don't offer an SP option, if that's important to you. I don't know about bots, because they don't have an official API, just an XML odds feed. However, it would appear they used to have an API in the past. No idea if it still works. https://smarkets.com/api/ https://smarkets.com/api/ http://smarkets.github.io/smk_api_docs/ http://smarkets.github.io/smk_api_docs/