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POST
curl --request POST \
  --url 'https://mainnet.helius-rpc.com/?api-key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "getPriorityFeeEstimate",
  "params": [
    {
      "transaction": "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"
    }
  ]
}
'
{
  "jsonrpc": "2.0",
  "result": {
    "priorityFeeEstimate": 120000
  },
  "id": "1"
}

Documentation Index

Fetch the complete documentation index at: https://www.helius.dev/docs/llms.txt

Use this file to discover all available pages before exploring further.

​
Request Parameters

​
transaction
string
Base58 or Base64 encoded Solana transaction for which to estimate optimal priority fees. The API will analyze the specific instructions and accounts in this transaction to provide accurate fee estimates based on current network conditions and computational complexity.
​
accountKeys
array
Array of Solana account public keys to estimate priority fees for (alternative to providing a transaction)
​
options
object
Advanced options for customizing Solana priority fee estimation based on network conditions
​
options.transactionEncoding
string
Encoding format of the provided Solana transaction
  • Base58
  • Base64
​
options.priorityLevel
string
Specific priority level to estimate fees for based on current Solana network congestion
  • Min
  • Low
  • Medium
  • High
  • VeryHigh
  • UnsafeMax
​
options.includeAllPriorityFeeLevels
boolean
When true, returns comprehensive estimates for all priority levels from minimum to maximum
​
options.lookbackSlots
number
Number of recent Solana blockchain slots to analyze for accurate fee estimation (1-150)
​
options.includeVote
boolean
When true, includes vote transactions in the fee calculation for more comprehensive analysis
​
options.recommended
boolean
When true, returns the recommended optimal fee based on current Solana network conditions
​
options.evaluateEmptySlotAsZero
boolean
When true, slots with no transactions are counted as zero-fee slots in the calculation

Authorizations

​
api-key
string
query
required

Your Helius API key. You can get one for free in the dashboard.

Body

application/json
​
jsonrpc
enum<string>
default:2.0

JSON-RPC version identifier for the Solana RPC API request, must be "2.0"

Available options:
2.0
​
id
string
default:1

Client-generated identifier for the request

​
method
enum<string>
default:getPriorityFeeEstimate

The RPC method name

Available options:
getPriorityFeeEstimate
​
params
object[]

Parameters for the method call

Response

Successfully retrieved Solana priority fee estimates

​
jsonrpc
enum<string>

JSON-RPC version identifier

Available options:
2.0
​
id
string

Client-generated identifier matching the request

​
result
object

Result object containing comprehensive Solana priority fee estimates