API3 is ChainLink in 2017. It is a first-party oracle backed by Digital Currency Group, Emurgo and many others. There is quite high probability Cardano will be using API3 as its native oracle. The current market cap is around 30M and it is available only on Uniswap, OKex and Huobi. We have been in a nice uptrend since the very beginning and now sit in the accumulation zone.