curl https://mainnet.ethereum.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getUncleCountByBlockNumber","params":["0xe8"],"id":1}'
Returns the number of uncles in a block from a block matching the given block hash.
This method will use 20 Compute Units.
QUANTITY|TAG - integer of a block number, or the string "latest", "earliest" or "pending", see the default block parameter
QUANTITY - integer of the number of uncles in this block.