Credits are a unit of account that we use to bill usage for RPCs, API requests, and data streaming products like LaserStream and Enhanced WebSockets.Every plan has a base number of credits, and every API call has an assigned credit cost.Below, we outline the credits per plan, credit costs by API, and credits for streaming data.
Monthly Allocation
Credits reset monthly
Credit Priority
Credits are consumed in this order: monthly, prepaid, autoscaling
Here is a breakdown of the total number of credits that are included by default in each plan.If you need more credits, upgrade your plan, enable autoscaling, purchase prepaid credits, or contact sales to discuss enterprise options.For more information, read our plans and pricing guide
Retrieve block data and transactions for a specified slot
getBlocks
10
Get list of blocks between two slots
getBlocksWithLimit
10
Get blocks starting at a given slot with limit
getSignaturesForAddress
10
Get transaction signatures for an address
getTransaction
10
Retrieve transaction details for a specified signature
getBlockTime
10
Get estimated production time of a block
getSignatureStatuses
10 / 1
Get statuses for transaction signatures. Cost depends on searchTransactionHistory parameter: 10 credits when enabled (searches historical data), 1 credit when disabled (searches recent blocks only)
getInflationReward
10
Get inflation reward for a list of addresses for an epoch
getTransactionsForAddress
100
Enhanced transaction history with advanced filtering, sorting, and full transaction data.
Plan Requirement: getTransactionsForAddress is only available on Developer plans and above. Free plan users will receive an error when attempting to use this endpoint.
Unlike regular credits that assign credits per call, data streaming products like Enhanced WebSockets and LaserStream assign credits per amount of data consumed.
Service
Credits
Notes
LaserStream gRPC
3
Per 0.1 MB of streamed data (uncompressed)
Enhanced WebSockets
3
Per 0.1 MB of streamed data (uncompressed). For users who upgrade to Business or Professional plans after October 16, 2025
Data Add-on (Pro Plan only)
3
Per 0.1 MB after included allowance (5-100TB). Applies to LaserStream and Enhanced WebSockets usage.
Enhanced WebSockets are available on Business and Professional plans.Users who upgrade after October 16, 2025 pay 3 credits per 0.1 MB. Users on these plans before this date remain unmetered.
LaserStream is available on Professional plans only for accessing Solana Mainnet-beta.LaserStream access for Solana Devnet is available on Developer and Business plans.All users pay 3 credits per 0.1 MB usage.
If you’re on a Professional plan, you may purchase Data Add-ons between 5TB-100TB per month to be used for both Enhanced WebSockets and LaserStream.Overages will be billed at 3 credits per 0.1 MB.
Helius offers two primary transaction submission methods: Sender, our specialized transaction landing service for traders and low-latency applications; and Staked Connections (default) for fast, reliable landing rates.
Method
Credits
Description
Sender
0
Ultra-low latency submission
Staked Connections
1
Highest reliability (default)
Staked Transactions Are Now Default for All Paid Plans: All transactions via mainnet.helius-rpc.com automatically use staked connections for highest success rates.
All ZK Compression API calls cost 10 credits each.One exception is getValidityProof which costs 100 credits per request because it is computationally intensive.
