For quants and coders, we provide a free JSON API with 1 minute updates on http://cryptomarketplot.com/api.json The syntax is compatible with the now discontinued CoinMarketCap JSON API. But it's better, as we also have useful extra fields: Bid, Ask, and Last price. And it's fully free, No key or login required.
We keep rolling new features. Ask, and we will see what we can do!