[eth]
https://rpc.nodeflare.app/eth/public
https://0xrpc.io/eth
https://rpc.fullsend.to

[bsc]
https://rpc.nodeflare.app/bnb/public

[polygon]
https://rpc.nodeflare.app/polygon/public
https://polygon.lava.build
https://pol.leorpc.com/?api_key=FREE