i've been searching for hours now. Also on StackExchange here. Are there any public nodes that i can connect to using jsonrpc? I want to lookup stuff (im not into generating priv keys or anything) but I dont want to use any api. So are there any public nodes that I can connect to?
Running public nodes for others to consume the JSONRPC API is not something that is widespread in the Bitcoin community. For a number of reasons, but the main one is probably that it's very low effort to run your own (you can get away with 10G of disk space and a few days of bootstrap time on a mid-range laptop).
That said, this website (hosted by @janoside) exposes some RPC commands publicly.