eth_getUncleCountByBlockHash
curl --request POST \
--url https://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14 \
--header 'Content-Type: application/json' \
--data '
{
"jsonrpc": "2.0",
"method": "eth_getUncleCountByBlockHash",
"id": 1,
"params": [
"0x07fcc7d5f86839e12afa756e979de05812b5341f936b850c9409aa0938819b30"
]
}
'import requests
url = "https://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14"
payload = {
"jsonrpc": "2.0",
"method": "eth_getUncleCountByBlockHash",
"id": 1,
"params": ["0x07fcc7d5f86839e12afa756e979de05812b5341f936b850c9409aa0938819b30"]
}
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: '2.0',
method: 'eth_getUncleCountByBlockHash',
id: 1,
params: ['0x07fcc7d5f86839e12afa756e979de05812b5341f936b850c9409aa0938819b30']
})
};
fetch('https://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14', 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://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14",
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' => '2.0',
'method' => 'eth_getUncleCountByBlockHash',
'id' => 1,
'params' => [
'0x07fcc7d5f86839e12afa756e979de05812b5341f936b850c9409aa0938819b30'
]
]),
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://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14"
payload := strings.NewReader("{\n \"jsonrpc\": \"2.0\",\n \"method\": \"eth_getUncleCountByBlockHash\",\n \"id\": 1,\n \"params\": [\n \"0x07fcc7d5f86839e12afa756e979de05812b5341f936b850c9409aa0938819b30\"\n ]\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://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14")
.header("Content-Type", "application/json")
.body("{\n \"jsonrpc\": \"2.0\",\n \"method\": \"eth_getUncleCountByBlockHash\",\n \"id\": 1,\n \"params\": [\n \"0x07fcc7d5f86839e12afa756e979de05812b5341f936b850c9409aa0938819b30\"\n ]\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14")
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\": \"2.0\",\n \"method\": \"eth_getUncleCountByBlockHash\",\n \"id\": 1,\n \"params\": [\n \"0x07fcc7d5f86839e12afa756e979de05812b5341f936b850c9409aa0938819b30\"\n ]\n}"
response = http.request(request)
puts response.read_body{
"jsonrpc": "<string>",
"id": 123,
"result": "<string>"
}Base node API
eth_getUncleCountByBlockHash | Base
Base API method that retrieves the number of uncles in a block, identified by its hash. Base API method that retrieves the number of uncles in a block.
POST
/
2fc1de7f08c0465f6a28e3c355e0cb14
eth_getUncleCountByBlockHash
curl --request POST \
--url https://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14 \
--header 'Content-Type: application/json' \
--data '
{
"jsonrpc": "2.0",
"method": "eth_getUncleCountByBlockHash",
"id": 1,
"params": [
"0x07fcc7d5f86839e12afa756e979de05812b5341f936b850c9409aa0938819b30"
]
}
'import requests
url = "https://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14"
payload = {
"jsonrpc": "2.0",
"method": "eth_getUncleCountByBlockHash",
"id": 1,
"params": ["0x07fcc7d5f86839e12afa756e979de05812b5341f936b850c9409aa0938819b30"]
}
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: '2.0',
method: 'eth_getUncleCountByBlockHash',
id: 1,
params: ['0x07fcc7d5f86839e12afa756e979de05812b5341f936b850c9409aa0938819b30']
})
};
fetch('https://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14', 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://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14",
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' => '2.0',
'method' => 'eth_getUncleCountByBlockHash',
'id' => 1,
'params' => [
'0x07fcc7d5f86839e12afa756e979de05812b5341f936b850c9409aa0938819b30'
]
]),
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://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14"
payload := strings.NewReader("{\n \"jsonrpc\": \"2.0\",\n \"method\": \"eth_getUncleCountByBlockHash\",\n \"id\": 1,\n \"params\": [\n \"0x07fcc7d5f86839e12afa756e979de05812b5341f936b850c9409aa0938819b30\"\n ]\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://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14")
.header("Content-Type", "application/json")
.body("{\n \"jsonrpc\": \"2.0\",\n \"method\": \"eth_getUncleCountByBlockHash\",\n \"id\": 1,\n \"params\": [\n \"0x07fcc7d5f86839e12afa756e979de05812b5341f936b850c9409aa0938819b30\"\n ]\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://base-mainnet.core.chainstack.com/2fc1de7f08c0465f6a28e3c355e0cb14")
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\": \"2.0\",\n \"method\": \"eth_getUncleCountByBlockHash\",\n \"id\": 1,\n \"params\": [\n \"0x07fcc7d5f86839e12afa756e979de05812b5341f936b850c9409aa0938819b30\"\n ]\n}"
response = http.request(request)
puts response.read_body{
"jsonrpc": "<string>",
"id": 123,
"result": "<string>"
}Base API method that retrieves the number of uncles in a block, identified by its hash. Uncles are blocks that are not part of the main chain but are still valid and have a relation to a block on the main chain.
This might be useful in the future when there’s a decentralized or a shared sequencer.
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Parameters
hash— the hash of the block for which the uncle count is being queried, as a hexadecimal string.
Response
result— the number of uncles in the specified block, encoded as a hexadecimal string. This count includes all uncles that were referenced by the block when it was mined.
Use case
Theeth_getUncleCountByBlockHash method is useful for applications that analyze blockchain security and decentralization aspects, such as block explorers or network analysis tools. It can help these applications understand the level of block competition and the rate at which uncles are included in the blockchain.Last modified on June 22, 2026
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