starknet_getStorageAt - STRK

Example code for the starknet_getStorageAt JSON-RPC method. Complete guide on how to use starknet_getStorageAt JSON-RPC in GetBlock Web3 documentation.

This method returns the felt value stored at a given storage key of a contract at a specific block. It is used to read raw contract state directly.

Parameters

Parameter	Type	Required	Description
contract_address	string	Yes	The contract to read from
key	string	Yes	The storage key (felt), typically a storage-var address
block_id	object | string	Yes	{block_number} or {block_hash}, or a tag

Request

cURL

curl --location --request POST 'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "starknet_getStorageAt",
    "params": ["0x049d36570d4e46f48e99674bd3fcc84644ddd6b96f7c741b1562b82f9e004dc7", "0x0206f38f7e4f15e87567361213c28f235cccdaa1d7fd34c9db1dfe9489c6a091", "latest"],
    "id": "getblock.io"
}'

Axios

example.js

const axios = require('axios');

const response = await axios.post('https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/', {
    jsonrpc: '2.0',
    method: 'starknet_getStorageAt',
    params: ['0x049d36570d4e46f48e99674bd3fcc84644ddd6b96f7c741b1562b82f9e004dc7', '0x0206f38f7e4f15e87567361213c28f235cccdaa1d7fd34c9db1dfe9489c6a091', 'latest'],
    id: 'getblock.io'
}, {
    headers: { 'Content-Type': 'application/json' }
});

console.log(response.data.result);

Request

example.py

import requests

response = requests.post(
    'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/',
    headers={'Content-Type': 'application/json'},
    json={
        'jsonrpc': '2.0',
        'method': 'starknet_getStorageAt',
        'params': ['0x049d36570d4e46f48e99674bd3fcc84644ddd6b96f7c741b1562b82f9e004dc7', '0x0206f38f7e4f15e87567361213c28f235cccdaa1d7fd34c9db1dfe9489c6a091', 'latest'],
        'id': 'getblock.io'
    }
)

print(response.json())

Rust

example.rs

use reqwest::Client;
use serde_json::{json, Value};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();

    let response = client
        .post("https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&json!({
            "jsonrpc": "2.0",
            "method": "starknet_getStorageAt",
            "params": ["0x049d36570d4e46f48e99674bd3fcc84644ddd6b96f7c741b1562b82f9e004dc7", "0x0206f38f7e4f15e87567361213c28f235cccdaa1d7fd34c9db1dfe9489c6a091", "latest"],
            "id": "getblock.io"
        }))
        .send()
        .await?
        .json::<Value>()
        .await?;

    println!("Result: {}", response["result"]);
    Ok(())
}

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "0x2386f26fc10000"
}

Response Parameters

Parameter	Type	Description
jsonrpc	string	JSON-RPC protocol version ("2.0")
id	string	Request identifier matching the request
result	string	Felt value stored at the requested key

Use Cases

• Raw State Reads: Read a storage slot that has no view function

• Proxy Inspection: Read an implementation pointer from a known slot

• Mapping Access: Read a mapping entry by its computed storage address

• Audit & Forensics: Verify on-chain state during analysis

Error Handling

Error	Message	Description
20 / CONTRACT_NOT_FOUND	Contract not found	No contract exists at the address at that block
24 / BLOCK_NOT_FOUND	Block not found	No block matches the supplied block_id