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POST
getFeeForMessage
curl --request POST \
  --url 'https://mainnet.helius-rpc.com/?api-key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "getFeeForMessage",
  "params": [
    "AQABAgIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEBAQAA"
  ]
}
'
{
  "jsonrpc": "2.0",
  "id": "1",
  "result": {
    "context": {
      "slot": 5068
    },
    "value": 5000
  }
}

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
required
Base-64 encoded serialized Solana transaction message to calculate the exact fee for.
​
commitment
string
The commitment level for the request.
  • confirmed
  • finalized
​
minContextSlot
number
The minimum slot that the request can be evaluated at.

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
required

The JSON-RPC protocol version.

Available options:
2.0
Example:

"2.0"

​
id
string
default:1
required

A unique identifier for the request.

Example:

"1"

​
method
enum<string>
default:getFeeForMessage
required

The name of the RPC method to invoke.

Available options:
getFeeForMessage
Example:

"getFeeForMessage"

​
params
(string | object)[]
required

Parameters for the method.

Base-64 encoded serialized Solana transaction message to calculate the exact fee for.

Example:

"AQABAgIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEBAQAA"

Response

Successfully retrieved the fee for the given message.

​
jsonrpc
enum<string>

The JSON-RPC protocol version.

Available options:
2.0
Example:

"2.0"

​
id
string

Identifier matching the request.

Example:

"1"

​
result
object

Fee information for the message.