wscat -c wss://go.getblock.io/<ACCESS-TOKEN>/
# wait for connection and send the request body
{"jsonrpc": "2.0",
"method": "eth_getUncleCountByBlockNumber",
"params": ["latest"],
"id": "getblock.io"}
Example code for the eth_getUncleCountByBlockNumber json-rpc method. Сomplete guide on how to use eth_getUncleCountByBlockNumber json-rpc in GetBlock.io Web3 documentation.