Command line

curl

curl https://rpc.testnet.radiustech.xyz/<YOUR-RPC-ENDPOINT> \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc": "2.0", "method": "eth_blockNumber", "params": [], "id": 1}'

cast

To use cast you must first install Foundry.

cast cast block-number \
  --rpc-url https://rpc.testnet.radiustech.xyz/<YOUR-RPC-ENDPOINT>