starknet_getClassAt

curl --request POST \
  --url https://starknet-mainnet.core.chainstack.com/365cf697a3ad6d950b4c4a911e2e4f4d \
  --header 'Content-Type: application/json' \
  --data '
{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "starknet_getClassAt",
  "params": [
    {
      "block_number": 385940
    },
    "0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82"
  ]
}
'

import requests

url = "https://starknet-mainnet.core.chainstack.com/365cf697a3ad6d950b4c4a911e2e4f4d"

payload = {
    "id": 1,
    "jsonrpc": "2.0",
    "method": "starknet_getClassAt",
    "params": [{ "block_number": 385940 }, "0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82"]
}
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({
    id: 1,
    jsonrpc: '2.0',
    method: 'starknet_getClassAt',
    params: [
      {block_number: 385940},
      '0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82'
    ]
  })
};

fetch('https://starknet-mainnet.core.chainstack.com/365cf697a3ad6d950b4c4a911e2e4f4d', 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://starknet-mainnet.core.chainstack.com/365cf697a3ad6d950b4c4a911e2e4f4d",
  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([
    'id' => 1,
    'jsonrpc' => '2.0',
    'method' => 'starknet_getClassAt',
    'params' => [
        [
                'block_number' => 385940
        ],
        '0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82'
    ]
  ]),
  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://starknet-mainnet.core.chainstack.com/365cf697a3ad6d950b4c4a911e2e4f4d"

	payload := strings.NewReader("{\n  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"starknet_getClassAt\",\n  \"params\": [\n    {\n      \"block_number\": 385940\n    },\n    \"0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82\"\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://starknet-mainnet.core.chainstack.com/365cf697a3ad6d950b4c4a911e2e4f4d")
  .header("Content-Type", "application/json")
  .body("{\n  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"starknet_getClassAt\",\n  \"params\": [\n    {\n      \"block_number\": 385940\n    },\n    \"0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82\"\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://starknet-mainnet.core.chainstack.com/365cf697a3ad6d950b4c4a911e2e4f4d")

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  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"starknet_getClassAt\",\n  \"params\": [\n    {\n      \"block_number\": 385940\n    },\n    \"0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82\"\n  ]\n}"

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

POST

365cf697a3ad6d950b4c4a911e2e4f4d

starknet_getClassAt

curl --request POST \
  --url https://starknet-mainnet.core.chainstack.com/365cf697a3ad6d950b4c4a911e2e4f4d \
  --header 'Content-Type: application/json' \
  --data '
{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "starknet_getClassAt",
  "params": [
    {
      "block_number": 385940
    },
    "0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82"
  ]
}
'

import requests

url = "https://starknet-mainnet.core.chainstack.com/365cf697a3ad6d950b4c4a911e2e4f4d"

payload = {
    "id": 1,
    "jsonrpc": "2.0",
    "method": "starknet_getClassAt",
    "params": [{ "block_number": 385940 }, "0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82"]
}
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({
    id: 1,
    jsonrpc: '2.0',
    method: 'starknet_getClassAt',
    params: [
      {block_number: 385940},
      '0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82'
    ]
  })
};

fetch('https://starknet-mainnet.core.chainstack.com/365cf697a3ad6d950b4c4a911e2e4f4d', 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://starknet-mainnet.core.chainstack.com/365cf697a3ad6d950b4c4a911e2e4f4d",
  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([
    'id' => 1,
    'jsonrpc' => '2.0',
    'method' => 'starknet_getClassAt',
    'params' => [
        [
                'block_number' => 385940
        ],
        '0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82'
    ]
  ]),
  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://starknet-mainnet.core.chainstack.com/365cf697a3ad6d950b4c4a911e2e4f4d"

	payload := strings.NewReader("{\n  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"starknet_getClassAt\",\n  \"params\": [\n    {\n      \"block_number\": 385940\n    },\n    \"0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82\"\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://starknet-mainnet.core.chainstack.com/365cf697a3ad6d950b4c4a911e2e4f4d")
  .header("Content-Type", "application/json")
  .body("{\n  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"starknet_getClassAt\",\n  \"params\": [\n    {\n      \"block_number\": 385940\n    },\n    \"0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82\"\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://starknet-mainnet.core.chainstack.com/365cf697a3ad6d950b4c4a911e2e4f4d")

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  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"starknet_getClassAt\",\n  \"params\": [\n    {\n      \"block_number\": 385940\n    },\n    \"0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82\"\n  ]\n}"

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

Starknet OpenRPC specFor the latest version of the publicly maintained OpenRPC spec, see the Starknet specs GitHub repo.

Starknet API method that returns the class of a contract at a given address. It provides the class of a contract at a specific address. This is useful for clients or wallets to inspect the class of a contract, which can provide information about the contract’s functionality and behavior.

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Parameters

address — the string of the address of the contract.

Response

class — the class of the contract at the given address.

Use case

A practical use case for starknet_getClassAt is to retrieve the class of a specific contract. For example, a wallet may use this method to display the class of a contract to a user, or a client may use it to verify the class of a contract before interacting with it.

Deprecated feeder gateway method

The feeder gateway was deprecated on December 11, 2023. Example of the call you had to make to the feeder gateway before the deprecation:

Shell

curl 'https://alpha-mainnet.starknet.io/feeder_gateway/get_full_contract?contractAddress=0x073314940630fd6dcda0d772d4c972c4e0a9946bef9dabf4ef84eda8ef542b82'

Body

application/json

integer

default:1

jsonrpc

string

default:2.0

method

string

default:starknet_getClassAt

params

(object | string)[]

Show child attributes

Response

200

Successful response

Last modified on June 22, 2026

APIs introduction

Node APIs

Faucet API

Chainstack platform API

starknet_getClassAt | Starknet

Parameters

Response

Use case

Deprecated feeder gateway method

Body

Response

​Parameters

​Response

​Use case

​Deprecated feeder gateway method

Body

Response

Parameters

Response

Use case

Deprecated feeder gateway method