# Hemi Documentation
> Bitcoin-secured modular rollup on Ethereum. JSON-RPC, OP-Node, and Debug.

- [Quicknode Hemi RPC Overview](https://www.quicknode.com/docs/hemi.md): Get started with Hemi RPC on Quicknode. Access reliable, low-latency blockchain infrastructure with globally distributed endpoints for seamless development.

## Making API Requests
- [Hemi QuickStart](https://www.quicknode.com/docs/hemi/quickstart.md): Get started with Hemi RPC on Quicknode. Follow this QuickStart to get up and running with your own Quicknode endpoint and making your first API request to the Hemi blockchain.
- [Hemi API Endpoints](https://www.quicknode.com/docs/hemi/endpoints.md): Learn how to use Hemi RPC endpoints, make API requests, and handle responses with Quicknode.
- [Hemi Endpoint Security](https://www.quicknode.com/docs/hemi/endpoint-security.md): Learn about endpoint security options and how to set up a Quicknode Hemi RPC endpoint for optimal performance and security.
- [Hemi Error Code Reference](https://www.quicknode.com/docs/hemi/error-references.md): Learn about Hemi error codes, including HTTP, JSON-RPC, and Quicknode's own custom error codes.

## API Reference
- [Hemi API Overview](https://www.quicknode.com/docs/hemi/api-overview.md): Overview of supported Hemi APIs, networks and supported products on Quicknode.

## Ethereum JSON-RPC API
- [eth_accounts RPC Method](https://www.quicknode.com/docs/hemi/eth_accounts.md): Returns an array of addresses owned by the client. Since Quicknode does not store private keys, this will always return an empty response.
- [eth_blockNumber RPC Method](https://www.quicknode.com/docs/hemi/eth_blockNumber.md): Returns the latest block number of the blockchain.
- [eth_call RPC Method](https://www.quicknode.com/docs/hemi/eth_call.md): Executes a new message call immediately without creating a transaction on the block chain.
- [eth_chainId RPC Method](https://www.quicknode.com/docs/hemi/eth_chainId.md): Returns the current network/chain ID, used to sign replay-protected transaction introduced in EIP-155.
- [eth_estimateGas RPC Method](https://www.quicknode.com/docs/hemi/eth_estimateGas.md): Returns an estimation of gas for a given transaction.
- [eth_feeHistory RPC Method](https://www.quicknode.com/docs/hemi/eth_feeHistory.md): Returns the collection of historical gas information.
- [eth_gasPrice RPC Method](https://www.quicknode.com/docs/hemi/eth_gasPrice.md): Returns the current gas price on the network in wei.
- [eth_getBalance RPC Method](https://www.quicknode.com/docs/hemi/eth_getBalance.md): Returns the balance of given account address in wei.
- [eth_getBlockByHash RPC Method](https://www.quicknode.com/docs/hemi/eth_getBlockByHash.md): Returns information of the block matching the given block hash.
- [eth_getBlockByNumber RPC Method](https://www.quicknode.com/docs/hemi/eth_getBlockByNumber.md): Returns information of the block matching the given block number.
- [eth_getBlockReceipts RPC Method](https://www.quicknode.com/docs/hemi/eth_getBlockReceipts.md): Returns all transaction receipts for a given block.
- [eth_getBlockTransactionCountByHash RPC Method](https://www.quicknode.com/docs/hemi/eth_getBlockTransactionCountByHash.md): Returns the number of transactions for the block matching the given block hash.
- [eth_getBlockTransactionCountByNumber RPC Method](https://www.quicknode.com/docs/hemi/eth_getBlockTransactionCountByNumber.md): Returns the number of transactions for the block matching the given block number.
- [eth_getCode RPC Method](https://www.quicknode.com/docs/hemi/eth_getCode.md): Returns the compiled bytecode of a smart contract.
- [eth_getFilterChanges RPC Method](https://www.quicknode.com/docs/hemi/eth_getFilterChanges.md): Polling method for a filter, which returns an array of events that have occurred since the last poll.
- [eth_getFilterLogs RPC Method](https://www.quicknode.com/docs/hemi/eth_getFilterLogs.md): Returns an array of all logs matching filter with given id.
- [eth_getLogs RPC Method](https://www.quicknode.com/docs/hemi/eth_getLogs.md): Returns an array of all logs matching a given filter object.
- [eth_getProof RPC Method](https://www.quicknode.com/docs/hemi/eth_getProof.md): Returns the account and storage values of the specified account including the Merkle-proof.
- [eth_getStorageAt RPC Method](https://www.quicknode.com/docs/hemi/eth_getStorageAt.md): Returns the value from a storage position at a given address.
- [eth_getTransactionByBlockHashAndIndex RPC Method](https://www.quicknode.com/docs/hemi/eth_getTransactionByBlockHashAndIndex.md): Returns information about a transaction given a blockhash and transaction index position.
- [eth_getTransactionByBlockNumberAndIndex RPC Method](https://www.quicknode.com/docs/hemi/eth_getTransactionByBlockNumberAndIndex.md): Returns information about a transaction given a block number and transaction index position.
- [eth_getTransactionByHash RPC Method](https://www.quicknode.com/docs/hemi/eth_getTransactionByHash.md): Returns the information about a transaction from a transaction hash.
- [eth_getRawTransactionByHash RPC Method](https://www.quicknode.com/docs/hemi/eth_getRawTransactionByHash.md): Returns the raw transaction data for a transaction hash.
- [eth_getTransactionCount RPC Method](https://www.quicknode.com/docs/hemi/eth_getTransactionCount.md): Returns the number of transactions sent from an address.
- [eth_getTransactionReceipt RPC Method](https://www.quicknode.com/docs/hemi/eth_getTransactionReceipt.md): Returns the receipt of a transaction by transaction hash.
- [eth_getUncleCountByBlockHash RPC Method](https://www.quicknode.com/docs/hemi/eth_getUncleCountByBlockHash.md): Returns the number of uncles for the block matching the given block hash.
- [eth_getUncleCountByBlockNumber RPC Method](https://www.quicknode.com/docs/hemi/eth_getUncleCountByBlockNumber.md): Returns the number of uncles for the block matching the given block number.
- [eth_maxPriorityFeePerGas RPC Method](https://www.quicknode.com/docs/hemi/eth_maxPriorityFeePerGas.md): Get the priority fee needed to be included in a block.
- [eth_newBlockFilter RPC Method](https://www.quicknode.com/docs/hemi/eth_newBlockFilter.md): Creates a filter in the node, to notify when a new block arrives. To check if the state has changed, call eth_getFilterChanges.
- [eth_newFilter RPC Method](https://www.quicknode.com/docs/hemi/eth_newFilter.md): Creates a filter object, based on filter options, to notify when the state changes (logs). To check if the state has changed, call eth_getFilterChanges.
- [eth_sendRawTransaction RPC Method](https://www.quicknode.com/docs/hemi/eth_sendRawTransaction.md): Creates new message call transaction or a contract creation for signed transactions. The new API Credit value for this method is 20 when used part of the Core API. If you are using eth_sendRawTransaction as part of a Marketplace add-on, view the add-on's homepage for more information about the specific charge.
- [eth_simulateV1 RPC Method](https://www.quicknode.com/docs/hemi/eth_simulateV1.md): Simulates a series of transactions at a specific block height with optional state overrides. This method allows you to test transactions with custom block and state parameters without actually submitting them to the network.
- [eth_subscribe RPC Method](https://www.quicknode.com/docs/hemi/eth_subscribe.md): Starts a subscription to a specific event.
- [eth_syncing RPC Method](https://www.quicknode.com/docs/hemi/eth_syncing.md): Returns an object with the sync status of the node if the node is out-of-sync and is syncing. Returns false when the node is already in sync.
- [eth_uninstallFilter RPC Method](https://www.quicknode.com/docs/hemi/eth_uninstallFilter.md): It uninstalls a filter with the given filter id.
- [eth_unsubscribe RPC Method](https://www.quicknode.com/docs/hemi/eth_unsubscribe.md): Cancels an existing subscription so that no further events are sent.
- [net_listening RPC Method](https://www.quicknode.com/docs/hemi/net_listening.md): Returns true if client is actively listening for network connections.
- [net_peerCount RPC Method](https://www.quicknode.com/docs/hemi/net_peerCount.md): Returns number of peers currently connected to the client.
- [net_version RPC Method](https://www.quicknode.com/docs/hemi/net_version.md): Returns the current network id.
- [web3_clientVersion RPC Method](https://www.quicknode.com/docs/hemi/web3_clientVersion.md): Returns the current version of the chain client.
- [web3_sha3 RPC Method](https://www.quicknode.com/docs/hemi/web3_sha3.md): Returns Keccak-256 (not the standardized SHA3-256) hash of the given data.

## Debug API
- [debug_getBadBlocks RPC Method](https://www.quicknode.com/docs/hemi/debug_getBadBlocks.md): Returns a list of the last bad blocks that the client has seen on the network.
- [debug_storageRangeAt RPC Method](https://www.quicknode.com/docs/hemi/debug_storageRangeAt.md): Returns the contract storage for the specified range.
- [debug_traceBlock RPC Method](https://www.quicknode.com/docs/hemi/debug_traceBlock.md): Returns a full stack trace of all invoked opcodes of all transactions that were included in a block.
- [debug_traceBlockByHash RPC Method](https://www.quicknode.com/docs/hemi/debug_traceBlockByHash.md): Returns the possible tracing result number by executing all transactions in the block specified by the block hash with a tracer.
- [debug_traceBlockByNumber RPC Method](https://www.quicknode.com/docs/hemi/debug_traceBlockByNumber.md): Returns the tracing result by executing all transactions in the block specified by number with a tracer.
- [debug_traceTransaction RPC Method](https://www.quicknode.com/docs/hemi/debug_traceTransaction.md): Returns all traces of a given transaction.

## OP-Node Methods
- [optimism_outputAtBlock RPC Method](https://www.quicknode.com/docs/hemi/optimism_outputAtBlock.md): Returns the output root at a specific block.
- [optimism_syncStatus RPC Method](https://www.quicknode.com/docs/hemi/optimism_syncStatus.md): Get the synchronization status.
- [optimism_rollupConfig RPC Method](https://www.quicknode.com/docs/hemi/optimism_rollupConfig.md): Get the rollup configuration parameters.
- [optimism_version RPC Method](https://www.quicknode.com/docs/hemi/optimism_version.md): Returns the software version.

## Marketplace
- [Supported Marketplace Add-Ons for Hemi](https://www.quicknode.com/docs/hemi/marketplace-addons.md): Learn about the Quicknode Marketplace and how to utilize Marketplace Add-ons on Hemi.