Method eth_getUncleByBlockNumberAndIndex undefined ()
connect with WS protocol

Parameters

QUANTITY|TAG - integer or string

block number or "latest", "earliest" or "pending"

QUANTITY - string

the uncle’s index position.

Request

wscat -c wss://matic.getblock.io/YOUR-API-KEY/mainnet/ 
# wait for connection and send the request body 
{"jsonrpc": "2.0",
"method": "eth_getUncleByBlockNumberAndIndex",
"params": ["latest", "0x0"],
"id": "getblock.io"}

Response

{
    "id": "getblock.io",
    "jsonrpc": "2.0",
    "result": null
}