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
}
'

import requests

url = "https://nd-202-842-353.p2pify.com/788f110831fe13808302bd79796d55e8"

payload = {
    "jsonrpc": "1.0",
    "method": "estimatesmartfee",
    "params": [6],
    "id": 1
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({jsonrpc: '1.0', method: 'estimatesmartfee', params: [6], id: 1})
};

fetch('https://nd-202-842-353.p2pify.com/788f110831fe13808302bd79796d55e8', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://nd-202-842-353.p2pify.com/788f110831fe13808302bd79796d55e8",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'jsonrpc' => '1.0',
    'method' => 'estimatesmartfee',
    'params' => [
        6
    ],
    'id' => 1
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://nd-202-842-353.p2pify.com/788f110831fe13808302bd79796d55e8"

	payload := strings.NewReader("{\n  \"jsonrpc\": \"1.0\",\n  \"method\": \"estimatesmartfee\",\n  \"params\": [\n    6\n  ],\n  \"id\": 1\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://nd-202-842-353.p2pify.com/788f110831fe13808302bd79796d55e8")
  .header("Content-Type", "application/json")
  .body("{\n  \"jsonrpc\": \"1.0\",\n  \"method\": \"estimatesmartfee\",\n  \"params\": [\n    6\n  ],\n  \"id\": 1\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://nd-202-842-353.p2pify.com/788f110831fe13808302bd79796d55e8")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"jsonrpc\": \"1.0\",\n  \"method\": \"estimatesmartfee\",\n  \"params\": [\n    6\n  ],\n  \"id\": 1\n}"

response = http.request(request)
puts response.read_body

{
  "result": {
    "feerate": 123,
    "blocks": 123
  },
  "error": {},
  "id": 123
}

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
}
'

import requests

url = "https://nd-202-842-353.p2pify.com/788f110831fe13808302bd79796d55e8"

payload = {
    "jsonrpc": "1.0",
    "method": "estimatesmartfee",
    "params": [6],
    "id": 1
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({jsonrpc: '1.0', method: 'estimatesmartfee', params: [6], id: 1})
};

fetch('https://nd-202-842-353.p2pify.com/788f110831fe13808302bd79796d55e8', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://nd-202-842-353.p2pify.com/788f110831fe13808302bd79796d55e8",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'jsonrpc' => '1.0',
    'method' => 'estimatesmartfee',
    'params' => [
        6
    ],
    'id' => 1
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://nd-202-842-353.p2pify.com/788f110831fe13808302bd79796d55e8"

	payload := strings.NewReader("{\n  \"jsonrpc\": \"1.0\",\n  \"method\": \"estimatesmartfee\",\n  \"params\": [\n    6\n  ],\n  \"id\": 1\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://nd-202-842-353.p2pify.com/788f110831fe13808302bd79796d55e8")
  .header("Content-Type", "application/json")
  .body("{\n  \"jsonrpc\": \"1.0\",\n  \"method\": \"estimatesmartfee\",\n  \"params\": [\n    6\n  ],\n  \"id\": 1\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://nd-202-842-353.p2pify.com/788f110831fe13808302bd79796d55e8")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"jsonrpc\": \"1.0\",\n  \"method\": \"estimatesmartfee\",\n  \"params\": [\n    6\n  ],\n  \"id\": 1\n}"

response = http.request(request)
puts response.read_body

{
  "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.

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.

Show child attributes

error

object

integer

Last modified on June 22, 2026

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estimatesmartfee | Bitcoin

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Response

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Body

Response

​Parameters

​Response

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Body

Response

Parameters

Response

Use case