# Replace SLOT_NUMBER_TO_QUERY with a valid slot, e.g., a recent one from an explorercurl https://mainnet.helius-rpc.com/?api-key=<api-key> -X POST -H "Content-Type: application/json" -d \ '{ "jsonrpc": "2.0", "id": 1, "method": "getBlockTime", "params": [ SLOT_NUMBER_TO_QUERY ] }'