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POST
/
788f110831fe13808302bd79796d55e8
estimatesmartfee
curl --request POST \
  --url https://nd-202-842-353.p2pify.com/788f110831fe13808302bd79796d55e8 \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "1.0",
  "method": "estimatesmartfee",
  "params": [
    6
  ],
  "id": 1
}
'
{
  "result": {
    "feerate": 123,
    "blocks": 123
  },
  "error": {},
  "id": 123
}
The estimatesmartfee method estimates the fee per kilobyte required for a transaction to be confirmed within a certain number of blocks. This is useful for dynamically adjusting transaction fees based on current network conditions.
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​
Parameters

  • conf_target (required): The number of blocks within which the transaction should be confirmed.

​
Response

  • result — an object containing the estimated fee rate (feerate) in BTC per kilobyte and the target number of blocks (blocks) for confirmation.
  • error — an object containing an error message if an error occurred, otherwise null.
  • id — an integer representing the ID of the request.

​
Use case

The estimatesmartfee method is crucial for wallet applications and services that need to adjust transaction fees dynamically. It helps ensure transactions are confirmed in a timely manner without overpaying.

Body

application/json
​
jsonrpc
string
default:1.0
​
method
string
default:estimatesmartfee
​
params
integer[]

The number of blocks within which the transaction is expected to be confirmed.

​
id
integer
default:1

Response

200 - application/json

The estimated fee per kilobyte for a transaction to be confirmed within the specified number of blocks.

​
result
object

Contains the estimated fee rate and the number of blocks.

​
error
object
​
id
integer
Last modified on August 7, 2025