SSZ Response Support

This endpoint also supports SSZ (SimpleSerialize) responses. Set Accept: application/octet-stream in the request header to receive an SSZ-encoded payload instead of JSON. SSZ responses are smaller and faster to parse, and are useful for consensus-layer clients and indexers.

curl -X GET "YOUR_QUICKNODE_ETHEREUM_URL/eth/v2/beacon/blocks/{block_id}" \
    -H "Accept: application/octet-stream" \
    --output block.ssz

Path Parameters

block_id

string

REQUIRED

The state identifier. It can be a slot number, blockRoot (encoded in hexadecimal format) or tags (Supported tags include - head (canonical head in node's view), genesis, finalized or justified)

Returns

version

string

The enumeration. The possible values could be: phase0, altair, bellatrix

data

object

The object with the following values:

message

object

The BeaconBlock object from the CL spec

slot

string

The slot to which this block corresponds

proposer_index

string

Index of validator in validator registry

parent_root

string

The signing merkle root of the parent BeaconBlock

state_root

string

The tree hash merkle root of the BeaconState for the BeaconBlock

body

object

The BeaconBlockBody object from the CL spec

signature

string

The signature

Request

1
curl -X GET "https://docs-demo.quiknode.pro/eth/v2/beacon/blocks/head" \
2
  -H "Content-Type: application/json" \
3
  -H "Accept: application/json"

1
curl -X GET "https://docs-demo.quiknode.pro/eth/v2/beacon/blocks/head" \
2
  -H "Content-Type: application/json" \
3
  -H "Accept: application/json"

1
async function main() {
2
    const response = await fetch('https://docs-demo.quiknode.pro/eth/v2/beacon/blocks/head', {
3
        method: 'GET',
4
        headers: {'Content-Type': 'application/json', 'Accept': 'application/json'}
5
    })
6
    const data = await response.json()
7
    console.log(data)
8
}
9

10
main()

1
async function main() {
2
    const response = await fetch('https://docs-demo.quiknode.pro/eth/v2/beacon/blocks/head', {
3
        method: 'GET',
4
        headers: {'Content-Type': 'application/json', 'Accept': 'application/json'}
5
    })
6
    const data = await response.json()
7
    console.log(data)
8
}
9

10
main()

1
import requests
2
import json
3

4
url = "https://docs-demo.quiknode.pro/eth/v2/beacon/blocks/head"
5

6
headers = {
7
  'Content-Type': 'application/json',
8
  'Accept': 'application/json'
9
}
10

11
response = requests.request("GET", url, headers=headers)
12

13
print(response.text)

1
import requests
2
import json
3

4
url = "https://docs-demo.quiknode.pro/eth/v2/beacon/blocks/head"
5

6
headers = {
7
  'Content-Type': 'application/json',
8
  'Accept': 'application/json'
9
}
10

11
response = requests.request("GET", url, headers=headers)
12

13
print(response.text)

1
require "uri"
2
require "json"
3
require "net/http"
4

5
uri = URI("https://docs-demo.quiknode.pro/eth/v2/beacon/blocks/head")
6

7
request = Net::HTTP::Get.new(uri)
8
request["Content-Type"] = "application/json"
9
request["Accept"] = "application/json"
10

11
response = Net::HTTP.start(uri.host, uri.port, use_ssl: true) do |http|
12
  http.request(request)
13
end
14

15
puts response.body

1
require "uri"
2
require "json"
3
require "net/http"
4

5
uri = URI("https://docs-demo.quiknode.pro/eth/v2/beacon/blocks/head")
6

7
request = Net::HTTP::Get.new(uri)
8
request["Content-Type"] = "application/json"
9
request["Accept"] = "application/json"
10

11
response = Net::HTTP.start(uri.host, uri.port, use_ssl: true) do |http|
12
  http.request(request)
13
end
14

15
puts response.body

Response

1
{
2
  "version": "fulu",
3
  "execution_optimistic": false,
4
  "finalized": false,
5
  "data": {
6
    "message": {
7
      "slot": "14114189",
8
      "proposer_index": "1660070",
9
      "parent_root": "0x135a0798fa8e27424e078ea2ff7c34784ed74c48eccd025a2ddb26592884b3c8",
10
      "state_root": "0x4d083b32036d09f04cfc26af83d9f8c5e6d84f37b416a89334da912452039f75",
11
      "body": {
12
        "graffiti": "0x0000000000000000000000000000000000000000000000000000000000000000"
13
      }
14
    },
15
    "signature": "0xb1c39ef8dfccb963b3e741c9f0650b1ec51b663d953f3515589a578324f0dc8df7a46df84f763ffaad3ef9e01f42f185123c6ecccc0398b07d234a18402b57e6e9f5218ce1d50b0c3fa3cabbf99477c6f65a1130983e559bb32665369eded6ef"
16
  }
17
}

1
{
2
  "version": "fulu",
3
  "execution_optimistic": false,
4
  "finalized": false,
5
  "data": {
6
    "message": {
7
      "slot": "14114189",
8
      "proposer_index": "1660070",
9
      "parent_root": "0x135a0798fa8e27424e078ea2ff7c34784ed74c48eccd025a2ddb26592884b3c8",
10
      "state_root": "0x4d083b32036d09f04cfc26af83d9f8c5e6d84f37b416a89334da912452039f75",
11
      "body": {
12
        "graffiti": "0x0000000000000000000000000000000000000000000000000000000000000000"
13
      }
14
    },
15
    "signature": "0xb1c39ef8dfccb963b3e741c9f0650b1ec51b663d953f3515589a578324f0dc8df7a46df84f763ffaad3ef9e01f42f185123c6ecccc0398b07d234a18402b57e6e9f5218ce1d50b0c3fa3cabbf99477c6f65a1130983e559bb32665369eded6ef"
16
  }
17
}

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