🟪 Polygon

Polygon API Documentation

eth_getUncleByBlockNumberAndIndex RPC Method

eth_getUncleByBlockNumberAndIndex method returns 'uncle' Information of a block by block number and the Uncle index position.


Block number - [required] - Block number as hexadecimal, or the string "latest", "earliest" or "pending".

Uncle index position - [required] - An integer indicating the uncle's index position encoded as hexadecimal.

params: [
    '0x10309F3', '0x0'


  • Block object or null when no block was found. Properties

    • number - The block number. Null when the returned block is the pending block.

    • hash 32 Bytes - Hash of the block. In case of a pending block, it returns null.

    • parentHash 32 Bytes - Hash of the parent block.

    • nonce 8 Bytes - Hash of the generated proof-of-work. Null if pending.

    • difficulty - The integer of the difficulty for this block encoded as a hexadecimal string.

    • totalDifficulty - Hexadecimal of the total difficulty of the chain until this block.

    • logsBloom - The bloom filter for the logs of the block. null if pending.

    • sha3uncles - SHA3 of the uncles data in the block.

    • extraData - The “extra data” field of this block.

    • timestamp - The Unix timestamp for when the block was collated.

    • size - The unix timestamp for when the block was collated.

    • miner 20 Bytes - The address of the miner receiving the reward.

    • transactionsRoot - The root of the transaction trie of the block.

    • stateRoot - The root of the final state trie of the block.

    • receiptsRoot 32 Bytes - The root of the receipts trie of the block.

    • uncles - An Array of uncle hashes.

    • transactions - Array of transaction objects, or 32 Bytes transaction hashes depending on the last given parameter.

    • gasUsed - The total used gas by all transactions in this block as a hexadecimal string.

    • gasLimit - The maximum gas allowed in this block encoded as a hexadecimal.

    • mixHash - A string of a 256-bit hash encoded as a hexadecimal.

    • baseFeePerGas - A string of the base fee encoded in hexadecimal format.


POST https://<network>.chainnodes.org/YOUR-API-KEY


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  • HTTPS POST Request with a JSON RPC call in the body
  • Replace YOUR-API-KEY with the API key from your CHAINNODES.ORG Dashboard
  • You can use a different supported network by replacing polygon-mainnet
curl https://polygon-mainnet.chainnodes.org/YOUR-API-KEY \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getUncleByBlockNumberAndIndex","params": ["0x10309F3","0x0"],"id":1}'



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JSON-RPC API Documentation by CHAINNODES is based on Erigon node client. Contact us if you are interested in specific methods that are only available on geth, besu, Nethermind or reth.