Read from MegaETH

How to query state and data from MegaETH — JSON-RPC methods, rate limiting, subscriptions, and real-time queries.

Realtime API

Standard Ethereum JSON-RPC was designed for chains with multi-second block times. On those chains, a one-second delay between execution and queryability is normal — you poll eth_getTransactionReceipt, wait for the next block, and eventually get your result.

MegaETH produces mini-blocks every ~10 milliseconds. If the read API still operated on one-second EVM blocks, applications would wait 100× longer than necessary to see their results. The Realtime API closes this gap: it queries against the most recent mini-block so that balances, receipts, logs, and state changes are visible within milliseconds of execution — not seconds.

Standard methods like eth_getBalance, eth_call, and eth_getTransactionReceipt already reflect mini-block state automatically when called with latest or pending. On top of that, MegaETH introduces four extension methods for even lower-latency workflows:

• realtime_sendRawTransaction — submit a transaction and get the receipt back in one call, no polling

• eth_subscribe — stream logs, state changes, mini-blocks, and block headers over WebSocket as they happen

• eth_callAfter — simulate a transaction after a prior one confirms (nonce-gated)

• eth_getLogsWithCursor — paginated log queries for large result sets

For use-case-oriented guidance (which method to use for what), see the Realtime API page.

Available Methods

The table below reflects the public MegaETH RPC endpoint. Methods marked "Managed only" are unavailable on the public endpoint but supported by managed RPC providers such as Alchemy. See Debugging Transactions for usage of debug methods, and Tooling for provider options.

Method	Availability	Additional Restrictions
debug_getRawBlock	Managed only
debug_getRawHeader	Managed only
debug_getRawReceipts	Managed only
debug_getRawTransaction	Managed only
debug_replayBlock	Managed only
debug_traceBlock	Managed only
debug_traceBlockByHash	Available
debug_traceBlockByNumber	Available
debug_traceCall	Managed only
debug_traceCallMany	Managed only
debug_traceTransaction	Available
eth_accounts	Available
eth_blockNumber	Available
eth_call	Available	Compute gas limited to 60,000,000.
eth_callAfter	Available	Compute gas limited to 60,000,000. Timeout limited to 60 seconds.
eth_callMany	Available	Compute gas limited to 60,000,000 per call.
eth_chainId	Available
eth_createAccessList	Available	Compute gas limited to 60,000,000.
eth_estimateGas	Available	Compute gas limited to 60,000,000.
eth_feeHistory	Available	Block range limited to 256.
eth_gasPrice	Available
eth_getBalance	Available
eth_getBlockByHash	Available
eth_getBlockByNumber	Available
eth_getBlockReceipts	Available
eth_getBlockTransactionCountByHash	Available
eth_getBlockTransactionCountByNumber	Available
eth_getCode	Available
eth_getFilterChanges	Unavailable
eth_getFilterLogs	Unavailable
eth_getLogs	Available
eth_getLogsWithCursor	Managed only
eth_getStorageAt	Available
eth_getTransactionByBlockHashAndIndex	Available
eth_getTransactionByBlockNumberAndIndex	Available
eth_getTransactionByHash	Available
eth_getTransactionCount	Available
eth_getTransactionReceipt	Available
eth_getUncleByBlockHashAndIndex	Available
eth_getUncleByBlockNumberAndIndex	Available
eth_getUncleCountByBlockHash	Available
eth_getUncleCountByBlockNumber	Available
eth_maxPriorityFeePerGas	Available
eth_mining	Available
eth_newBlockFilter	Available
eth_newFilter	Available
eth_newPendingTransactionFilter	Available
eth_protocolVersion	Available
eth_sendRawTransaction	Available
eth_sendTransaction	Unavailable	Use eth_sendRawTransaction with a signed transaction.
eth_sign	Unavailable	Sign client-side.
eth_signTransaction	Unavailable	Sign client-side.
eth_signTypedData	Unavailable	Sign client-side.
eth_subscribe	WebSocket only
eth_syncing	Available
eth_uninstallFilter	Available
eth_unsubscribe	WebSocket only
net_listening	Available
net_peerCount	Available
net_version	Available
realtime_sendRawTransaction	Available
trace_block	Managed only
trace_call	Managed only
trace_callMany	Managed only
trace_get	Managed only
trace_rawTransaction	Managed only
trace_replayBlockTransactions	Managed only
trace_replayTransaction	Managed only
trace_transaction	Managed only
txpool_content	Unavailable
txpool_contentFrom	Unavailable
txpool_inspect	Unavailable
txpool_status	Unavailable
web3_clientVersion	Available

Rate Limiting

All available methods are subject to rate limiting based on two criteria:

• Compute Unit (CU) Limiting — limits the computational cost of requests based on their complexity.

• Network Bandwidth Limiting — limits the network traffic based on response sizes.

User limits are dynamically updated in response to individual behavior.

Related Pages

• Realtime API — use-case guide for streaming data and instant receipts

• Error Codes — HTTP and RPC error codes with mitigations