FYI, even if OP or someone else doesn't want to run their own full node, they could use service (such as getnodes.io) which offer Bitcoin Core API.
Does this getnodes.io work for you? Can you access the site?
I can't seem to access the site and my AV Kaspersky blocking it I also tried accessing it through other devices but it seems it's down.
Anyway, OP does not look exactly what we pointed to.
I also cannot access getnodes.io, although i'm sure i accessed it normally few months ago.
Getnodes.io doesn't have any IP address attached to it. Are you sure that you wen't trying to go to get
block.io or maybe
bitnodes.io? Because both of them work on my end.
The best API for price tracking is already mentioned above Coingecko and another one is Coinmarketcap but if you still looking for another price tracker with API check this one for Bitcoin only.
Personally, the most responsive price API I've seen so far is the Binance API, and you can couple that with any fiat currency exchange rate API in order to get things like BTC-USD price and stuff like that. But it needs an API key for both sites. That's fine though because you can just cache the fiat data and update it every 24 hours or at midnight.