I have tried https://dexi.io/ https://dexi.io/ (free account) about a year ago and it looks very good. One downside is that it was issuing requests from Europe

I have tried https://dexi.io/ https://dexi.io/ (free account) about a year ago and it looks very good. One downside is that it was issuing requests from Europe by default, so you had to bring your own proxy for the US, for example.