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Returns information about a uncle of a block given the block hash and the uncle index position.

For Growth and Custom service plans

This JSON-RPC method allows a request to be forwarded to a partner service provider if Infura should experience a service issue or outage. See Failover protection and Enable API request forwarding for complete details.

If you would like failover protection but don't qualify under your current plan, then either self-upgrade to the Growth plan or contact a sales representative to upgrade to a Custom plan.


  • block hash: [Required] A string representing the hash (32 bytes) of a block.
  • uncle index position: [Required] A hexadecimal equivalent of the integer indicating the uncle's index position.


A block object, or null when no block was found. The block object returned will consist of the following keys and their values:

  • number: The block number. Null when the returned block is the pending block.
  • hash: 32 bytes. Hash of the block. Null when its pending block.
  • parentHash: 32 bytes. Hash of the parent block.
  • nonce: 8 bytes. Hash of the generated proof-of-work. Null when the returned block is the pending block.
  • sha3Uncles: 32 bytes. The SHA3 of the uncles data in the block.
  • logsBloom: 256 bytes. The Bloom filter for the logs of the block. Null when the returned block is the pending block.
  • transactionsRoot: 32 bytes. The root of the transaction trie of the block.
  • stateRoot: 32 bytes. The root of the final state trie of the block.
  • receiptsRoot: 32 bytes. The root of the receipts trie of the block.
  • miner: 20 bytes. The address of the beneficiary to whom the mining rewards were given.
  • difficulty: The hexadecimal of the difficulty for this block.
  • totalDifficulty: The hexadecimal of the total difficulty of the chain until this block.
  • extraData: The "extra data" field of this block.
  • size: The hexadecimal of the size of this block in bytes.
  • gasLimit: Maximum gas allowed in this block.
  • gasUsed: Total used gas by all transactions in this block.
  • timestamp: The unix timestamp for when the block was collated.
  • uncles: (Array). An array of uncle hashes.


Replace YOUR-API-KEY with an API key from your Infura dashboard.


curl \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getUncleByBlockHashAndIndex","params": ["0xb3b20624f8f0f86eb50dd04688409e5cea4bd02d700bf6e79e9384d47d6a5a35","0x0"],"id":1}'


"id" : 1,
"jsonrpc" : "2.0",
"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",
"totalDifficulty": null,
"transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
"uncles": []