Parameters

QUANTITY|TAG - A block number, or the string "earliest", "latest" or "pending", as in the default block parameter.
QUANTITY - The uncle's index position.

params: [
    "0x29c", // 668
    "0x0", // 0
];

Returns

See eth_getBlockByHash

NOTE: The return does not contain a list of transactions in the uncle block, to get this, make another request to ethgetBlockByHash or _eth_getBlockByNumber

Example

Request

curl https://eth-mainnet.unifra.io/v1/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getUncleByBlockNumberAndIndex","params":["0x29c", "0x0"],"id":0}'

URL: https://eth-mainnet.unifra.io/v1/your-api-key
RequestType: POST
Body:
{
    "jsonrpc":"2.0",
    "method":"eth_getUncleByBlockNumberAndIndex",
    "params":["0x29c", "0x0"],
    "id":0
}

Result

{
    "jsonrpc": "2.0",
    "id": 0,
    "result": {
        "difficulty": "0x57f117f5c",
        "extraData": "0x476574682f76312e302e302f77696e646f77732f676f312e342e32",
        "gasLimit": "0x1388",
        "gasUsed": "0x0",
        "hash": "0x932bdf904546a2287a2c9b2ede37925f698a7657484b172d4e5184f80bdd464d",
        "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
        "miner": "0x5bf5e9cf9b456d6591073513de7fd69a9bef04bc",
        "mixHash": "0x4500aa4ee2b3044a155252e35273770edeb2ab6f8cb19ca8e732771484462169",
        "nonce": "0x24732773618192ac",
        "number": "0x299",
        "parentHash": "0xa779859b1ee558258b7008bbabff272280136c5dd3eb3ea3bfa8f6ae03bf91e5",
        "receiptsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
        "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
        "size": "0x21d",
        "stateRoot": "0x2604fbf5183f5360da249b51f1b9f1e0f315d2ff3ffa1a4143ff221ad9ca1fec",
        "timestamp": "0x55ba4827",
        "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
        "uncles": []
    }
}