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What are Compute Units and Throughput Compute Units?

For more details, please check out the Compute Units section and the Throughput Compute Units section.

Standard EVM JSON-RPC Methods

Method	CU	Throughput CU
net_version	0
eth_chainId	0
eth_syncing	0
eth_protocolVersion	0
net_listening	0
eth_uninstallFilter	10
eth_accounts	10
eth_blockNumber	10
eth_subscribe	10
eth_unsubscribe	10
eth_feeHistory	10
eth_maxPriorityFeePerGas	10
eth_createAccessList	10
eth_getTransactionReceipt	20
eth_getUncleByBlockHashAndIndex	20
eth_getUncleByBlockNumberAndIndex	20
eth_getTransactionByBlockHashAndIndex	20
eth_getTransactionByBlockNumberAndIndex	20
eth_getUncleCountByBlockHash	20
eth_getUncleCountByBlockNumber	20
web3_clientVersion	20
web3_sha3	20
eth_getBlockByNumber	20
eth_getStorageAt	20
eth_getTransactionByHash	20
eth_gasPrice	20
eth_getBalance	20
eth_getCode	20
eth_getFilterChanges	20
eth_newBlockFilter	20
eth_newFilter	20
eth_simulateV1	40
eth_newPendingTransactionFilter	20
eth_getBlockTransactionCountByHash	20
eth_getBlockTransactionCountByNumber	20
eth_getProof	20
eth_getBlockByHash	20
erigon_forks	20
erigon_getHeaderByHash	20
erigon_getHeaderByNumber	20
erigon_getLogsByHash	20
erigon_issuance	20
eth_getTransactionCount	20
eth_call	26
eth_getFilterLogs	60
eth_getLogs	60
eth_estimateGas	20
eth_sendRawTransaction	40	250
eth_getBlockReceipts	20	500
batch	CU of method # times called

To view the batch request breakdown in the dashboard, click on “raw request”

NFT API

We want builders to be able to use as much of the NFT API as they need without worrying about throughput. Because of that, we have discounted how NFT API requests count towards your applications’ guaranteed throughput by 6-10x. This means you can make more concurrent NFT API requests, and use the “Throughput CU” below to calculate how much you can use!

Method	CU	Throughput CU
getNFTMetadata	80	10
getContractMetadata	160	10
getCollectionMetadata	240	10
getNFTsForOwner	480	100
getContractsForOwner	320	100
getCollectionsForOwner	360	100
getNFTsForContract	480	50
getOwnersForNFT	80	10
getOwnersForContract	480	20
getFloorPrice	80	10
getNFTSales	160	10
computeRarity	80	10
summarizeNFTAttributes	80	10
isHolderOfContract	80	10
searchContractMetadata	480	50
getNFTMetadataBatch	480	100
getContractMetadataBatch	480	100
getSpamContracts	480	10
isSpamContract	80	10
isAirdropNFT	80	10
invalidateContract	80	80
refreshNftMetadata	40	10
reingestContract	480	480
reportSpam	0	10

🆕 Solana DAS (NFT/Token) APIs

Method	CU	Throughput CU
getAsset	80	200
getAssets	480	200
getAssetProof	160	200
getAssetProofs	480	200
getAssetsByAuthority	480	200
getAssetsByOwner	480	200
getAssetsByGroup	480	200
getAssetsByCreator	480	200
searchAssets	480	200
getAssetSignatures	160	200
getNftEditions	160	200
getTokenAccounts	160	200

Transfers API

Method	CU
alchemy_getAssetTransfers	120

Portfolio APIs

Method	CU
assets/nfts/by-address	1000
assets/nfts/contracts/by-address	600
assets/tokens/by-address	360
assets/tokens/balances/by-address	200
/transactions/history/by-address	1000

Token API

Method	CU
alchemy_getTokenBalances	20
alchemy_getTokenMetadata	10
alchemy_getTokenAllowance	20

Prices API

Method	CU
tokens/by-symbol	40
tokens/by-address	40
tokens/historical	40

Utility APIs

Method	CU
blocks/by-timestamp	10
alchemy_getTransactionReceipts	250

Transact

Method	CU
alchemy_sendGasOptimizedTransaction	2500
alchemy_getGasOptimizedTransactionStatus	25
eth_sendPrivateTransaction	250
eth_cancelPrivateTransaction	250
alchemy_simulateAssetChanges	2500
alchemy_simulateExecution	2500

Debug API

Method	CU	Throughput CU
debug_traceTransaction	40	1000
debug_traceCall	40	1000
debug_traceBlockByHash	40	1000
debug_traceBlockByNumber	40	1000

Trace API

Method	CU	Throughput CU
trace_get	20	20
trace_block	20	20
trace_transaction	40	40
trace_call	40	40
trace_rawTransaction	40	40
trace_filter	40	40
trace_replayTransaction	80	3000
trace_replayBlockTransactions	80	3000

Polygon PoS Specific Methods

Method	CU
bor_getAuthor	10
bor_getCurrentProposer	10
bor_getCurrentValidators	10
bor_getRootHash	10
bor_getSignersAtHash	10

Polygon zkEVM Specific Methods

Method	CU
zkevm_batchNumber	10
zkevm_batchNumberByBlockNumber	10
zkevm_consolidatedBlockNumber	10
zkevm_getBatchByNumber	10
zkevm_getBroadcastURI	10
zkevm_isBlockConsolidated	10
zkevm_isBlockVirtualized	10
zkevm_verifiedBatchNumber	10
zkevm_virtualBatchNumber	10
zkevm_estimateFee	40
zkevm_estimateGasPrice	40

zkSync Era Specific Methods

All zkSync Era specific methods cost 10 CUs, this includes the methods listed below:

Gas Manager & Bundler APIs

Similar to the NFT API, the Gas Manager & Bundler APIs implement “Throughput CU” to count separately toward your applications’ throughput!

Method	CU	Throughput CU
eth_sendUserOperation	1000	100
eth_estimateUserOperationGas	500	50
eth_getUserOperationByHash	20	17
eth_getUserOperationReceipt	20	15
eth_supportedEntryPoints	10	5
rundler_maxPriorityFeePerGas	10	10
alchemy_simulateUserOperationAssetChanges	2500	2500
alchemy_requestPaymasterAndData	1000	100
alchemy_requestGasAndPaymasterAndData	1250	125
alchemy_requestFeePayer	1000	100

Wallet APIs

Similar to the NFT API, the Wallet APIs implement “Throughput CU” to count separately toward your applications’ throughput!

Method	CU	Throughput CU
wallet_requestAccount	50	-
wallet_prepareCalls	700	50
wallet_sendPreparedCalls	1000	100
wallet_createAccount	50	-
wallet_createSession	50	-
wallet_getCallsStatus	20	-
wallet_listAccounts	10	-

Embedded Account APIs

Similar to the NFT API, the Embedded Account APIs implement “Throughput CU” to count separately toward your applications’ throughput!

Method	CU	Throughput CU
/signer/auth	100	50
/signer/lookup	100	50
/signer/signup	1000	300
/signer/sign-payload	6000	300
/signer/whoami	100	20

Standard Starknet JSON-RPC Methods

Method	CU
starknet_getBlockWithTxHashes	20
starknet_getBlockWithTxs	20
starknet_getStateUpdate	20
starknet_getStorageAt	20
starknet_getTransactionByHash	20
starknet_getTransactionByBlockIdAndIndex	20
starknet_getTransactionReceipt	20
starknet_getClass	20
starknet_getClassHashAt	20
starknet_getClassAt	20
starknet_getBlockTransactionCount	20
starknet_call	20
starknet_blockNumber	20
starknet_blockHashAndNumber	20
starknet_chainId	0
starknet_pendingTransactions	20
starknet_syncing	0
starknet_getNonce	20
starknet_getEvents	20
starknet_estimateFee	20
starknet_addInvokeTransaction	160
starknet_addDeclareTransaction	160
starknet_addDeployAccountTransaction	160
starknet_estimateMessageFee	20
starknet_getBlockWithReceipts	20
starknet_traceBlockTransactions	80
starknet_specVersion	10
starknet_getTransactionStatus	20
starknet_simulateTransactions	20

Standard Solana JSON-RPC Methods

Method	CU
getLeaderSchedule	20
requestAirdrop	20
getVoteAccounts	5
getBlockCommitment	5
getBlocksWithLimit	20
getHealth	20
getIdentity	20
getLatestBlockhash	20
getSlot	20
getInflationRate	20
getMaxRetransmitSlot	20
getRecentPerformanceSamples	20
getEpochInfo	20
getTokenAccountBalance	20
getBlockTime	20
getHighestSnapshotSlot	20
sendTransaction	10
getEpochSchedule	20
getStakeActivation	20
getMaxShredInsertSlot	20
getVersion	20
isBlockhashValid	20
getAccountInfo	10
getFeeForMessage	20
getFees	20
getConfirmedBlocks	20
getTokenLargestAccounts	20
getTokenOwnersByDelegate	10
getInflationGovernor	20
getSlotLeader	20
getMultipleAccounts	11
minimumLedgerSlot	20
getBlockHeight	20
simulateTransaction	20
getFeeCalculatorForBlockhash	11
getSignatureStatuses	20
getRecentBlockhash	10
getBlocks	10
getTokenAccountsByOwner	10
getMinimumBalanceForRentExemption	10
getBalance	10
getGenesisHash	10
getBlockProduction	10
getTokenSupply	20
getTransactionCount	16
getSlotLeaders	20
getClusterNodes	20
getSignaturesForAddress	20
getFirstAvailableBlock	40
getConfirmedSignaturesForAddress2	40
getConfirmedTransaction	40
getTransaction	40
getBlock	40
getProgramAccounts	20
getConfirmedBlock	40
getInflationReward	40
getSupply	160
getLargestAccounts	3000
batch*	CU of method # times called

To view the batch request breakdown in the dashboard, click on “raw request”

Webhooks and Subscription APIs

Webhooks and WebSocket WebSocket Subscriptions on Alchemy are priced based on bandwidth: the amount of data delivered as part of the subscription.

Each subscription type is priced identically per byte:

Bandwidth	CU
1 byte	.04

On average, a typical webhook or WebSocket subscription event is about 1000 bytes, so it would consume 40 compute units. Note that this can vary significantly based on the specific event delivered Subscription API Quickstart

Compute unit cost for error codes

Error	Compute Units
Non-existing methods	0
`429, 403`	0
Other `4xx` or `5xx`	CU value of specific endpoint
`32600: IP Address not on whitelist`	0
`32600: App is inactive`	0
`32600: Unspecified origin not on whitelist`	0