The Bitcoin API is fundamentally broken - it assumes that the daemon (that syncs up to the network) and the wallet are the same thing.
There is more to it than that. The only way to use the Bitcoin API is if the coin is almost identical to Bitcoin itself, which is why 99% of the hundreds of worthless pump-and-dump altcoin clones use the Bitcoin API.
A coin that actually does anything fundamentally new or differently compared to Bitcoin (which is certainly the case for Monero) will need to have a different API.
If anything "uses the Bitcoin API" is a strong clue that you are looking at a worthless clone coin.