Currently I'm using the API of CoinMarketCap, which supports over 1300 coins!
To your second question about monetizing. You can publish and sell your extensions aswell. In my opinions, this does not make sense as all, as there is a lot of competition and most of extensions are for free.
However, I'm not trying to make any profits with this Project. It was just for fun and wanted to contributed something to the community.
Currently I'm using the API of CoinMarketCap, which supports over 1300 coins!
To your second question about monetizing. You can publish and sell your extensions aswell. In my opinions, this does not make sense as all, as there is a lot of competition and most of extensions are for free.
However, I'm not trying to make any profits with this Project. It was just for fun and wanted to contributed something to the community.