POST
/
efb0a5eccd2caa5135eb54eba6f7f300
curl --request POST \
  --url https://optimism-mainnet.core.chainstack.com/efb0a5eccd2caa5135eb54eba6f7f300 \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "method": "eth_getStorageAt",
  "id": 1,
  "params": [
    "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85",
    "0x7",
    "latest"
  ]
}'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": "<string>"
}

Optimism API method eth_getStorageAt retrieves the value from a specific storage position of a contract at a given address. This method is useful for inspecting the state of smart contracts at specific points in their execution or at a particular block.

This example makes a call to slot 7 of the USDC contract on the Optimism Mainnet.

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​
Parameters

  • address — the address of the contract to access.
  • position — the storage position to inspect, given as a hexadecimal value.
  • block — the block number (in hexadecimal) or one of the strings "earliest", "latest", or "pending", indicating the state to consider. The default is "latest".

​
Response

  • result — the value from the specified storage position at the given address, returned as a hexadecimal string.

​
Use case

The eth_getStorageAt method is essential for:

  • Developers and auditors who need to verify the state and behavior of smart contracts by inspecting their storage.
  • DApps that require access to contract state that is not exposed through contract methods.
  • Tools and services that monitor contract state for changes, updates, or anomalies.

Body

application/json
​
jsonrpc
string
default:2.0
required
​
method
string
default:eth_getStorageAt
required
​
id
integer
default:1
required
​
params
string[]
required

Response

200 - application/json
The value from the specified storage position
​
jsonrpc
string
​
id
integer
​
result
string